/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:04:51,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:04:51,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:04:51,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:04:52,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:04:52,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:04:52,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:04:52,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:04:52,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:04:52,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:04:52,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:04:52,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:04:52,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:04:52,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:04:52,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:04:52,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:04:52,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:04:52,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:04:52,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:04:52,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:04:52,278 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:04:52,279 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:04:52,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-07-13 20:04:52,279 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-07-13 20:04:52,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:04:52,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:04:52,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:04:52,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:04:52,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:04:52,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:04:52,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:04:52,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:04:52,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:04:52,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... [2021-07-13 20:04:52,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:04:52,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:04:52,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:04:52,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:04:52,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:04:52,590 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:04:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:04:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:04:52,590 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:04:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:04:52,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:04:52,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:04:52,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:04:52,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:04:52,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:04:52,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:04:52,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:04:52,592 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:04:52,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:04:52,706 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:04:52,708 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:04:52 BoogieIcfgContainer [2021-07-13 20:04:52,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:04:52,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:04:52,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:04:52,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:04:52,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:52" (1/2) ... [2021-07-13 20:04:52,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@731e34 and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:04:52, skipping insertion in model container [2021-07-13 20:04:52,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:04:52" (2/2) ... [2021-07-13 20:04:52,713 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-07-13 20:04:52,716 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:04:52,716 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:04:52,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:04:52,717 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:04:52,768 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:04:52,787 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:04:52,801 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:04:52,801 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:04:52,801 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:04:52,801 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:04:52,801 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:04:52,801 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:04:52,801 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:04:52,802 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:04:52,807 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-07-13 20:04:52,822 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:04:52,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:52,829 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:52,830 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-07-13 20:04:52,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:52,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975078555] [2021-07-13 20:04:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:52,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:52,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975078555] [2021-07-13 20:04:52,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975078555] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:52,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:04:52,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:04:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873876942] [2021-07-13 20:04:52,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:04:52,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:04:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:04:52,995 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2021-07-13 20:04:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:53,047 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-07-13 20:04:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:04:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2021-07-13 20:04:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:53,063 INFO L225 Difference]: With dead ends: 214 [2021-07-13 20:04:53,064 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 20:04:53,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:04:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 20:04:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-07-13 20:04:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-07-13 20:04:53,123 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-07-13 20:04:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,124 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-07-13 20:04:53,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2021-07-13 20:04:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-07-13 20:04:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:04:53,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,125 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:53,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:04:53,126 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-07-13 20:04:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:53,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698115254] [2021-07-13 20:04:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:53,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698115254] [2021-07-13 20:04:53,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698115254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540094805] [2021-07-13 20:04:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:04:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540094805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:53,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:04:53,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439463284] [2021-07-13 20:04:53,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:53,304 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:53,394 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-07-13 20:04:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:04:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:04:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:53,396 INFO L225 Difference]: With dead ends: 365 [2021-07-13 20:04:53,396 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 20:04:53,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:04:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 20:04:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-07-13 20:04:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-07-13 20:04:53,409 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-07-13 20:04:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-07-13 20:04:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-07-13 20:04:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:04:53,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:53,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:04:53,614 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-07-13 20:04:53,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:53,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783288145] [2021-07-13 20:04:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:53,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783288145] [2021-07-13 20:04:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783288145] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:04:53,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:04:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394636054] [2021-07-13 20:04:53,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:04:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:04:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:04:53,643 INFO L87 Difference]: Start difference. First operand 179 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-07-13 20:04:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:53,667 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-07-13 20:04:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:04:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2021-07-13 20:04:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:53,669 INFO L225 Difference]: With dead ends: 237 [2021-07-13 20:04:53,669 INFO L226 Difference]: Without dead ends: 237 [2021-07-13 20:04:53,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:04:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-13 20:04:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-07-13 20:04:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-07-13 20:04:53,677 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-07-13 20:04:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,678 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-07-13 20:04:53,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-07-13 20:04:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-07-13 20:04:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:04:53,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,681 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:53,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:04:53,681 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-07-13 20:04:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:53,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929426078] [2021-07-13 20:04:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:53,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929426078] [2021-07-13 20:04:53,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929426078] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:53,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:04:53,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:04:53,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631369566] [2021-07-13 20:04:53,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:53,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:53,717 INFO L87 Difference]: Start difference. First operand 188 states and 559 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) [2021-07-13 20:04:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:53,750 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-07-13 20:04:53,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:53,751 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 [2021-07-13 20:04:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:53,753 INFO L225 Difference]: With dead ends: 293 [2021-07-13 20:04:53,753 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 20:04:53,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 20:04:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-07-13 20:04:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-07-13 20:04:53,770 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-07-13 20:04:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:53,770 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-07-13 20:04:53,770 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) [2021-07-13 20:04:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-07-13 20:04:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:04:53,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:53,776 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:53,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:04:53,776 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-07-13 20:04:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:53,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818635535] [2021-07-13 20:04:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:53,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818635535] [2021-07-13 20:04:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818635535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759731905] [2021-07-13 20:04:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:53,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:04:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759731905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:53,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:53,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:04:53,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385955231] [2021-07-13 20:04:53,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:53,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:53,952 INFO L87 Difference]: Start difference. First operand 164 states and 478 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:54,006 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-07-13 20:04:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:04:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 20:04:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:54,007 INFO L225 Difference]: With dead ends: 348 [2021-07-13 20:04:54,007 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 20:04:54,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:04:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 20:04:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-07-13 20:04:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-07-13 20:04:54,013 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-07-13 20:04:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:54,013 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-07-13 20:04:54,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-07-13 20:04:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:04:54,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:54,014 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:54,221 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-07-13 20:04:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:54,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411569979] [2021-07-13 20:04:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:54,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:54,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411569979] [2021-07-13 20:04:54,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411569979] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:54,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:04:54,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:04:54,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567279372] [2021-07-13 20:04:54,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:04:54,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:04:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:04:54,240 INFO L87 Difference]: Start difference. First operand 170 states and 501 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-07-13 20:04:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:54,270 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-07-13 20:04:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:54,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2021-07-13 20:04:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:54,271 INFO L225 Difference]: With dead ends: 204 [2021-07-13 20:04:54,271 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 20:04:54,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 20:04:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-07-13 20:04:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-07-13 20:04:54,275 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-07-13 20:04:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:54,275 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-07-13 20:04:54,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2021-07-13 20:04:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-07-13 20:04:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:54,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:54,276 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:54,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:04:54,276 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-07-13 20:04:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:54,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978029268] [2021-07-13 20:04:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:54,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978029268] [2021-07-13 20:04:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978029268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134779961] [2021-07-13 20:04:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:54,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134779961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:54,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 20:04:54,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45448032] [2021-07-13 20:04:54,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:04:54,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:04:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:04:54,394 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:54,477 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-07-13 20:04:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:04:54,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:04:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:54,478 INFO L225 Difference]: With dead ends: 284 [2021-07-13 20:04:54,478 INFO L226 Difference]: Without dead ends: 284 [2021-07-13 20:04:54,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:04:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-13 20:04:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-07-13 20:04:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-07-13 20:04:54,483 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-07-13 20:04:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:54,484 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-07-13 20:04:54,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-07-13 20:04:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:54,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:54,484 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:54,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:54,697 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-07-13 20:04:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999636195] [2021-07-13 20:04:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:54,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999636195] [2021-07-13 20:04:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999636195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119356030] [2021-07-13 20:04:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:04:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119356030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:54,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:54,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:04:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644338673] [2021-07-13 20:04:54,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:54,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:54,891 INFO L87 Difference]: Start difference. First operand 216 states and 608 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:54,928 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-07-13 20:04:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:04:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:54,930 INFO L225 Difference]: With dead ends: 348 [2021-07-13 20:04:54,930 INFO L226 Difference]: Without dead ends: 327 [2021-07-13 20:04:54,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-13 20:04:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-07-13 20:04:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-07-13 20:04:54,936 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-07-13 20:04:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:54,936 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-07-13 20:04:54,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-07-13 20:04:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:54,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:54,937 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:55,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,144 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:55,144 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-07-13 20:04:55,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:55,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025002440] [2021-07-13 20:04:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:55,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:55,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025002440] [2021-07-13 20:04:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025002440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571432710] [2021-07-13 20:04:55,183 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:55,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:04:55,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:55,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571432710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:55,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:04:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120343833] [2021-07-13 20:04:55,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:55,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:55,267 INFO L87 Difference]: Start difference. First operand 250 states and 721 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:55,298 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-07-13 20:04:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:04:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:55,301 INFO L225 Difference]: With dead ends: 521 [2021-07-13 20:04:55,301 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 20:04:55,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 20:04:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-07-13 20:04:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-07-13 20:04:55,309 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-07-13 20:04:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:55,309 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-07-13 20:04:55,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-07-13 20:04:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:55,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:55,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:55,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,518 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:55,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-07-13 20:04:55,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:55,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741395600] [2021-07-13 20:04:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:55,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:55,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741395600] [2021-07-13 20:04:55,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741395600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795922539] [2021-07-13 20:04:55,562 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:04:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:04:55,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:55,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795922539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:55,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:04:55,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495616893] [2021-07-13 20:04:55,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:55,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:55,647 INFO L87 Difference]: Start difference. First operand 290 states and 869 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:55,682 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-07-13 20:04:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:04:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:55,684 INFO L225 Difference]: With dead ends: 528 [2021-07-13 20:04:55,684 INFO L226 Difference]: Without dead ends: 507 [2021-07-13 20:04:55,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-13 20:04:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-07-13 20:04:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-07-13 20:04:55,692 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-07-13 20:04:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:55,692 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-07-13 20:04:55,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-07-13 20:04:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:55,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:55,693 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:55,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,909 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-07-13 20:04:55,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:55,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862325949] [2021-07-13 20:04:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:55,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862325949] [2021-07-13 20:04:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862325949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146879915] [2021-07-13 20:04:55,926 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:55,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:55,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146879915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:56,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:04:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760763249] [2021-07-13 20:04:56,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:56,016 INFO L87 Difference]: Start difference. First operand 326 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:56,090 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-07-13 20:04:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:04:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:04:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:56,094 INFO L225 Difference]: With dead ends: 686 [2021-07-13 20:04:56,094 INFO L226 Difference]: Without dead ends: 686 [2021-07-13 20:04:56,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-13 20:04:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-07-13 20:04:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-07-13 20:04:56,105 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-07-13 20:04:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:56,105 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-07-13 20:04:56,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-07-13 20:04:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:04:56,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:56,106 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:56,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:56,321 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-07-13 20:04:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:56,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593862775] [2021-07-13 20:04:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593862775] [2021-07-13 20:04:56,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593862775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229979953] [2021-07-13 20:04:56,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:56,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:04:56,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229979953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:56,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:04:56,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493425145] [2021-07-13 20:04:56,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:56,413 INFO L87 Difference]: Start difference. First operand 370 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:56,506 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-07-13 20:04:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:04:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:04:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:56,509 INFO L225 Difference]: With dead ends: 642 [2021-07-13 20:04:56,509 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 20:04:56,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 20:04:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-07-13 20:04:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-07-13 20:04:56,519 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-07-13 20:04:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:56,519 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-07-13 20:04:56,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-07-13 20:04:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:56,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:56,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:56,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:04:56,737 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-07-13 20:04:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:56,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939800185] [2021-07-13 20:04:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939800185] [2021-07-13 20:04:56,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939800185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026745845] [2021-07-13 20:04:56,785 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:56,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:56,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026745845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:56,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:56,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:04:56,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713178424] [2021-07-13 20:04:56,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:56,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:56,853 INFO L87 Difference]: Start difference. First operand 388 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:56,887 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-07-13 20:04:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:04:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:56,891 INFO L225 Difference]: With dead ends: 752 [2021-07-13 20:04:56,891 INFO L226 Difference]: Without dead ends: 731 [2021-07-13 20:04:56,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-13 20:04:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-07-13 20:04:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-07-13 20:04:56,901 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-07-13 20:04:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:56,902 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-07-13 20:04:56,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-07-13 20:04:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:56,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:56,903 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:57,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,117 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-07-13 20:04:57,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:57,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884829095] [2021-07-13 20:04:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:57,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:57,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884829095] [2021-07-13 20:04:57,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884829095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566151007] [2021-07-13 20:04:57,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:57,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566151007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:57,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:04:57,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831339171] [2021-07-13 20:04:57,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:57,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:57,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:57,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:57,225 INFO L87 Difference]: Start difference. First operand 468 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:57,279 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-07-13 20:04:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:04:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:57,283 INFO L225 Difference]: With dead ends: 738 [2021-07-13 20:04:57,283 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 20:04:57,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 20:04:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-07-13 20:04:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-07-13 20:04:57,297 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-07-13 20:04:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:57,298 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-07-13 20:04:57,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-07-13 20:04:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:57,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:57,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:57,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,509 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:57,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-07-13 20:04:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:57,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873992452] [2021-07-13 20:04:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:57,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873992452] [2021-07-13 20:04:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873992452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538839148] [2021-07-13 20:04:57,556 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:04:57,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:57,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:04:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:57,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538839148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:57,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:04:57,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899827501] [2021-07-13 20:04:57,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:57,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:57,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:57,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:57,669 INFO L87 Difference]: Start difference. First operand 485 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:57,708 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-07-13 20:04:57,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:04:57,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:57,711 INFO L225 Difference]: With dead ends: 608 [2021-07-13 20:04:57,711 INFO L226 Difference]: Without dead ends: 587 [2021-07-13 20:04:57,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-13 20:04:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-07-13 20:04:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-07-13 20:04:57,721 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-07-13 20:04:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-07-13 20:04:57,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-07-13 20:04:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:57,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:57,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:04:57,937 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-07-13 20:04:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813985525] [2021-07-13 20:04:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:57,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813985525] [2021-07-13 20:04:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813985525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314445281] [2021-07-13 20:04:57,957 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:57,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:57,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314445281] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:58,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:04:58,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-07-13 20:04:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98157280] [2021-07-13 20:04:58,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:58,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:58,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:04:58,026 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:58,072 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-07-13 20:04:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:04:58,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:58,074 INFO L225 Difference]: With dead ends: 728 [2021-07-13 20:04:58,075 INFO L226 Difference]: Without dead ends: 696 [2021-07-13 20:04:58,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-07-13 20:04:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-07-13 20:04:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-07-13 20:04:58,087 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-07-13 20:04:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:58,087 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-07-13 20:04:58,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-07-13 20:04:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:58,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:58,089 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:04:58,297 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-07-13 20:04:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016563781] [2021-07-13 20:04:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:04:58,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016563781] [2021-07-13 20:04:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016563781] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:58,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:04:58,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:04:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044932784] [2021-07-13 20:04:58,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:58,323 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:58,339 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-07-13 20:04:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:04:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:58,342 INFO L225 Difference]: With dead ends: 673 [2021-07-13 20:04:58,342 INFO L226 Difference]: Without dead ends: 625 [2021-07-13 20:04:58,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:04:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-07-13 20:04:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-07-13 20:04:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-07-13 20:04:58,353 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-07-13 20:04:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:58,353 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-07-13 20:04:58,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-07-13 20:04:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:58,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:58,354 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:58,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 20:04:58,354 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-07-13 20:04:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047128709] [2021-07-13 20:04:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:58,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047128709] [2021-07-13 20:04:58,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047128709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:58,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885728831] [2021-07-13 20:04:58,369 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:58,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:04:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885728831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:58,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:58,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:04:58,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137198339] [2021-07-13 20:04:58,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:04:58,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:04:58,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:58,436 INFO L87 Difference]: Start difference. First operand 529 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:58,527 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-07-13 20:04:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:04:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:58,530 INFO L225 Difference]: With dead ends: 834 [2021-07-13 20:04:58,530 INFO L226 Difference]: Without dead ends: 804 [2021-07-13 20:04:58,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:04:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-13 20:04:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-07-13 20:04:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-07-13 20:04:58,543 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-07-13 20:04:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:58,543 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-07-13 20:04:58,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-07-13 20:04:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:58,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:58,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:58,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:04:58,760 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-07-13 20:04:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45032200] [2021-07-13 20:04:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:58,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45032200] [2021-07-13 20:04:58,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45032200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:58,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824725819] [2021-07-13 20:04:58,777 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:04:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:58,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824725819] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:04:58,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:04:58,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-13 20:04:58,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143802889] [2021-07-13 20:04:58,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:04:58,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:58,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:04:58,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:04:58,867 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:58,921 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-07-13 20:04:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:04:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:58,924 INFO L225 Difference]: With dead ends: 790 [2021-07-13 20:04:58,924 INFO L226 Difference]: Without dead ends: 782 [2021-07-13 20:04:58,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:04:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-07-13 20:04:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-07-13 20:04:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-07-13 20:04:58,940 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-07-13 20:04:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:58,940 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-07-13 20:04:58,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-07-13 20:04:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:58,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:58,941 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:59,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:59,158 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-07-13 20:04:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:59,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510826411] [2021-07-13 20:04:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510826411] [2021-07-13 20:04:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510826411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662842477] [2021-07-13 20:04:59,180 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:59,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:59,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:04:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662842477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:59,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 20:04:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892776785] [2021-07-13 20:04:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:59,268 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:59,375 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-07-13 20:04:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:04:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:59,378 INFO L225 Difference]: With dead ends: 768 [2021-07-13 20:04:59,378 INFO L226 Difference]: Without dead ends: 732 [2021-07-13 20:04:59,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:04:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-13 20:04:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-07-13 20:04:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-07-13 20:04:59,389 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-07-13 20:04:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:59,389 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-07-13 20:04:59,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-07-13 20:04:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:59,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:59,391 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:59,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:59,607 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-07-13 20:04:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:59,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116242938] [2021-07-13 20:04:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:59,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116242938] [2021-07-13 20:04:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116242938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926449883] [2021-07-13 20:04:59,636 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:59,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:04:59,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:59,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:04:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:59,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926449883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:59,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:59,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:04:59,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123086951] [2021-07-13 20:04:59,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:59,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:59,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:59,709 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:59,819 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-07-13 20:04:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:04:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:04:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:59,823 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 20:04:59,823 INFO L226 Difference]: Without dead ends: 987 [2021-07-13 20:04:59,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:04:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-07-13 20:04:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-07-13 20:04:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-07-13 20:04:59,837 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-07-13 20:04:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:59,837 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-07-13 20:04:59,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-07-13 20:04:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:04:59,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:59,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,053 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-07-13 20:05:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160388911] [2021-07-13 20:05:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160388911] [2021-07-13 20:05:00,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160388911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359077583] [2021-07-13 20:05:00,080 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359077583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:00,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:05:00,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120026315] [2021-07-13 20:05:00,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:05:00,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:05:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:05:00,147 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:00,230 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-07-13 20:05:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:00,234 INFO L225 Difference]: With dead ends: 1120 [2021-07-13 20:05:00,234 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 20:05:00,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 20:05:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-07-13 20:05:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-07-13 20:05:00,251 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-07-13 20:05:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:00,251 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-07-13 20:05:00,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-07-13 20:05:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:00,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,253 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:05:00,469 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-07-13 20:05:00,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636342873] [2021-07-13 20:05:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636342873] [2021-07-13 20:05:00,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636342873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041249883] [2021-07-13 20:05:00,488 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:00,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041249883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:00,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 20:05:00,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501818618] [2021-07-13 20:05:00,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:05:00,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:00,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:05:00,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:05:00,570 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:00,651 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-07-13 20:05:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:00,656 INFO L225 Difference]: With dead ends: 1340 [2021-07-13 20:05:00,656 INFO L226 Difference]: Without dead ends: 1332 [2021-07-13 20:05:00,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-13 20:05:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-07-13 20:05:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-07-13 20:05:00,676 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-07-13 20:05:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:00,676 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-07-13 20:05:00,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-07-13 20:05:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:00,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,678 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:05:00,893 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-07-13 20:05:00,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749012186] [2021-07-13 20:05:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749012186] [2021-07-13 20:05:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749012186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876815754] [2021-07-13 20:05:00,927 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:00,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:00,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876815754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:01,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:05:01,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321827925] [2021-07-13 20:05:01,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:01,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:01,022 INFO L87 Difference]: Start difference. First operand 992 states and 3345 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:01,159 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-07-13 20:05:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:05:01,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:01,178 INFO L225 Difference]: With dead ends: 1623 [2021-07-13 20:05:01,178 INFO L226 Difference]: Without dead ends: 1615 [2021-07-13 20:05:01,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-13 20:05:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-07-13 20:05:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-07-13 20:05:01,203 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-07-13 20:05:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:01,204 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-07-13 20:05:01,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-07-13 20:05:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:01,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:01,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:01,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:05:01,425 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:01,426 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-07-13 20:05:01,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:01,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462838284] [2021-07-13 20:05:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:01,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462838284] [2021-07-13 20:05:01,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462838284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111190233] [2021-07-13 20:05:01,447 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111190233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:01,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 20:05:01,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730765839] [2021-07-13 20:05:01,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:05:01,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:01,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:05:01,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:05:01,540 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:01,649 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-07-13 20:05:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:01,653 INFO L225 Difference]: With dead ends: 1527 [2021-07-13 20:05:01,653 INFO L226 Difference]: Without dead ends: 1515 [2021-07-13 20:05:01,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-13 20:05:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-07-13 20:05:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-07-13 20:05:01,677 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-07-13 20:05:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:01,678 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-07-13 20:05:01,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-07-13 20:05:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:01,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:01,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:05:01,897 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-07-13 20:05:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380160901] [2021-07-13 20:05:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:01,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380160901] [2021-07-13 20:05:01,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380160901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825703403] [2021-07-13 20:05:01,933 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:01,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825703403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:02,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-13 20:05:02,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121720231] [2021-07-13 20:05:02,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:02,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:02,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:02,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:02,010 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:02,137 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-07-13 20:05:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:02,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:02,143 INFO L225 Difference]: With dead ends: 2197 [2021-07-13 20:05:02,143 INFO L226 Difference]: Without dead ends: 2197 [2021-07-13 20:05:02,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-07-13 20:05:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-07-13 20:05:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-07-13 20:05:02,172 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-07-13 20:05:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:02,172 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-07-13 20:05:02,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-07-13 20:05:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:02,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:02,175 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:02,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:05:02,389 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-07-13 20:05:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:02,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611756720] [2021-07-13 20:05:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611756720] [2021-07-13 20:05:02,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611756720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104237249] [2021-07-13 20:05:02,412 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 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 [2021-07-13 20:05:02,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:05:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:05:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104237249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:02,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 20:05:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486294520] [2021-07-13 20:05:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:05:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:05:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:05:02,493 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:02,641 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-07-13 20:05:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:02,645 INFO L225 Difference]: With dead ends: 1739 [2021-07-13 20:05:02,645 INFO L226 Difference]: Without dead ends: 1693 [2021-07-13 20:05:02,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-07-13 20:05:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-07-13 20:05:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-07-13 20:05:02,670 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-07-13 20:05:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:02,670 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-07-13 20:05:02,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-07-13 20:05:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:02,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:02,673 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:02,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:02,889 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-07-13 20:05:02,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:02,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779187024] [2021-07-13 20:05:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:02,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:02,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779187024] [2021-07-13 20:05:02,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779187024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006215074] [2021-07-13 20:05:02,934 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 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 [2021-07-13 20:05:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:03,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006215074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:03,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:05:03,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927140478] [2021-07-13 20:05:03,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:05:03,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:05:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,011 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:03,053 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-07-13 20:05:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:05:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:03,058 INFO L225 Difference]: With dead ends: 1808 [2021-07-13 20:05:03,058 INFO L226 Difference]: Without dead ends: 1787 [2021-07-13 20:05:03,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-07-13 20:05:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-07-13 20:05:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-07-13 20:05:03,092 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-07-13 20:05:03,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:03,092 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-07-13 20:05:03,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-07-13 20:05:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:03,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:03,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:03,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:05:03,309 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-07-13 20:05:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:03,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550291804] [2021-07-13 20:05:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:03,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:03,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550291804] [2021-07-13 20:05:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550291804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867323988] [2021-07-13 20:05:03,366 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 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 [2021-07-13 20:05:03,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:03,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:03,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:03,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867323988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:05:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205443789] [2021-07-13 20:05:03,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:05:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:05:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,453 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:03,513 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-07-13 20:05:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:05:03,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:03,518 INFO L225 Difference]: With dead ends: 1722 [2021-07-13 20:05:03,518 INFO L226 Difference]: Without dead ends: 1701 [2021-07-13 20:05:03,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-07-13 20:05:03,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-07-13 20:05:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-07-13 20:05:03,548 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-07-13 20:05:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:03,548 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-07-13 20:05:03,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-07-13 20:05:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:03,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:03,551 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:03,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:05:03,765 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-07-13 20:05:03,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982798104] [2021-07-13 20:05:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982798104] [2021-07-13 20:05:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982798104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661001243] [2021-07-13 20:05:03,813 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 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 [2021-07-13 20:05:03,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:03,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661001243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:03,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:05:03,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680291831] [2021-07-13 20:05:03,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:05:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:05:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,881 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:03,928 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-07-13 20:05:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:05:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:03,932 INFO L225 Difference]: With dead ends: 1802 [2021-07-13 20:05:03,932 INFO L226 Difference]: Without dead ends: 1781 [2021-07-13 20:05:03,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-13 20:05:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-07-13 20:05:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-07-13 20:05:03,966 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-07-13 20:05:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:03,966 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-07-13 20:05:03,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-07-13 20:05:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:03,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:03,968 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:04,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:04,189 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-07-13 20:05:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:04,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584919907] [2021-07-13 20:05:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584919907] [2021-07-13 20:05:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584919907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722593202] [2021-07-13 20:05:04,227 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 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 [2021-07-13 20:05:04,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:04,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722593202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:04,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:05:04,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238738031] [2021-07-13 20:05:04,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:04,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:04,310 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:04,505 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-07-13 20:05:04,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:04,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:04,516 INFO L225 Difference]: With dead ends: 4383 [2021-07-13 20:05:04,516 INFO L226 Difference]: Without dead ends: 4383 [2021-07-13 20:05:04,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-07-13 20:05:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-07-13 20:05:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-07-13 20:05:04,585 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-07-13 20:05:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:04,585 INFO L482 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-07-13 20:05:04,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-07-13 20:05:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:04,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:04,590 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:04,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:04,807 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-07-13 20:05:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:04,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964937359] [2021-07-13 20:05:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964937359] [2021-07-13 20:05:04,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964937359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240281092] [2021-07-13 20:05:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:05:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240281092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:04,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:05:04,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597754833] [2021-07-13 20:05:04,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:04,913 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:05,110 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-07-13 20:05:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:05,126 INFO L225 Difference]: With dead ends: 6576 [2021-07-13 20:05:05,126 INFO L226 Difference]: Without dead ends: 6576 [2021-07-13 20:05:05,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-07-13 20:05:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-07-13 20:05:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-07-13 20:05:05,213 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-07-13 20:05:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:05,213 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-07-13 20:05:05,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-07-13 20:05:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:05,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:05,221 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:05,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 20:05:05,431 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-07-13 20:05:05,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:05,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621409431] [2021-07-13 20:05:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621409431] [2021-07-13 20:05:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621409431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515710086] [2021-07-13 20:05:05,455 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:05,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515710086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:05,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547350295] [2021-07-13 20:05:05,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:05,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:05,539 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:05,706 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-07-13 20:05:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:05,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:05,748 INFO L225 Difference]: With dead ends: 6297 [2021-07-13 20:05:05,749 INFO L226 Difference]: Without dead ends: 6289 [2021-07-13 20:05:05,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-07-13 20:05:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-07-13 20:05:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-07-13 20:05:05,842 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-07-13 20:05:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:05,842 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-07-13 20:05:05,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-07-13 20:05:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:05,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:05,851 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:06,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:06,067 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-07-13 20:05:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:06,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041874037] [2021-07-13 20:05:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041874037] [2021-07-13 20:05:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041874037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15979219] [2021-07-13 20:05:06,098 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:05:06,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15979219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:06,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:05:06,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127338755] [2021-07-13 20:05:06,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:06,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:06,183 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:06,472 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-07-13 20:05:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:06,496 INFO L225 Difference]: With dead ends: 8906 [2021-07-13 20:05:06,496 INFO L226 Difference]: Without dead ends: 8900 [2021-07-13 20:05:06,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-07-13 20:05:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-07-13 20:05:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-07-13 20:05:06,661 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-07-13 20:05:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:06,661 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-07-13 20:05:06,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-07-13 20:05:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:06,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:06,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:06,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:05:06,897 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-07-13 20:05:06,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:06,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244000332] [2021-07-13 20:05:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:06,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244000332] [2021-07-13 20:05:06,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244000332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177266973] [2021-07-13 20:05:06,926 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 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 [2021-07-13 20:05:06,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:07,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177266973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:07,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:07,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:05:07,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311681849] [2021-07-13 20:05:07,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:07,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:07,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:07,007 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:07,220 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-07-13 20:05:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:07,248 INFO L225 Difference]: With dead ends: 12359 [2021-07-13 20:05:07,248 INFO L226 Difference]: Without dead ends: 12359 [2021-07-13 20:05:07,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-07-13 20:05:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-07-13 20:05:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-07-13 20:05:07,549 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-07-13 20:05:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:07,549 INFO L482 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-07-13 20:05:07,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-07-13 20:05:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:07,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:07,569 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:07,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:07,774 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-07-13 20:05:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:07,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757161309] [2021-07-13 20:05:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:07,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:07,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757161309] [2021-07-13 20:05:07,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757161309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:07,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029062734] [2021-07-13 20:05:07,847 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 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 [2021-07-13 20:05:07,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:07,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:07,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:07,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029062734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:07,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:07,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:07,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991141361] [2021-07-13 20:05:07,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:07,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:07,931 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,110 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-07-13 20:05:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:05:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,173 INFO L225 Difference]: With dead ends: 11482 [2021-07-13 20:05:08,173 INFO L226 Difference]: Without dead ends: 11472 [2021-07-13 20:05:08,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-07-13 20:05:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-07-13 20:05:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-07-13 20:05:08,422 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-07-13 20:05:08,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,422 INFO L482 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-07-13 20:05:08,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-07-13 20:05:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:08,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,442 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:08,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:05:08,657 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-07-13 20:05:08,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:08,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149486962] [2021-07-13 20:05:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:08,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:08,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149486962] [2021-07-13 20:05:08,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149486962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:08,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615169496] [2021-07-13 20:05:08,689 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 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 [2021-07-13 20:05:08,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:08,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615169496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:08,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:08,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:05:08,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144327482] [2021-07-13 20:05:08,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:08,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:08,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:08,817 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:09,029 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-07-13 20:05:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:09,090 INFO L225 Difference]: With dead ends: 16493 [2021-07-13 20:05:09,090 INFO L226 Difference]: Without dead ends: 16493 [2021-07-13 20:05:09,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-07-13 20:05:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-07-13 20:05:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-07-13 20:05:09,349 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-07-13 20:05:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:09,349 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-07-13 20:05:09,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-07-13 20:05:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:09,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:09,362 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:09,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:05:09,563 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-07-13 20:05:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:09,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361620324] [2021-07-13 20:05:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361620324] [2021-07-13 20:05:09,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361620324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318708434] [2021-07-13 20:05:09,583 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 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 [2021-07-13 20:05:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318708434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:09,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:09,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635557347] [2021-07-13 20:05:09,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:09,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:09,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:09,663 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:09,880 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-07-13 20:05:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:09,896 INFO L225 Difference]: With dead ends: 8444 [2021-07-13 20:05:09,896 INFO L226 Difference]: Without dead ends: 8414 [2021-07-13 20:05:09,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-07-13 20:05:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-07-13 20:05:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-07-13 20:05:10,022 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-07-13 20:05:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:10,022 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-07-13 20:05:10,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-07-13 20:05:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:10,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:10,034 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:10,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:05:10,234 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-07-13 20:05:10,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:10,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204047748] [2021-07-13 20:05:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:10,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:10,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204047748] [2021-07-13 20:05:10,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204047748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:10,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053478502] [2021-07-13 20:05:10,260 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 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 [2021-07-13 20:05:10,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053478502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 20:05:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460754839] [2021-07-13 20:05:10,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:10,337 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:05:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:10,544 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-07-13 20:05:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 23 [2021-07-13 20:05:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:10,563 INFO L225 Difference]: With dead ends: 8606 [2021-07-13 20:05:10,563 INFO L226 Difference]: Without dead ends: 8543 [2021-07-13 20:05:10,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-07-13 20:05:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-07-13 20:05:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-07-13 20:05:10,728 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-07-13 20:05:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:10,728 INFO L482 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-07-13 20:05:10,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-13 20:05:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-07-13 20:05:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:10,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:10,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:10,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:05:10,942 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-07-13 20:05:10,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:10,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028158321] [2021-07-13 20:05:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028158321] [2021-07-13 20:05:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028158321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124983133] [2021-07-13 20:05:11,003 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 [2021-07-13 20:05:11,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:11,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124983133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:11,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:05:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46734483] [2021-07-13 20:05:11,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:11,121 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:11,275 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-07-13 20:05:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-07-13 20:05:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:11,294 INFO L225 Difference]: With dead ends: 8205 [2021-07-13 20:05:11,294 INFO L226 Difference]: Without dead ends: 8172 [2021-07-13 20:05:11,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-07-13 20:05:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-07-13 20:05:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-07-13 20:05:11,486 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-07-13 20:05:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:11,486 INFO L482 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-07-13 20:05:11,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-07-13 20:05:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:11,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:11,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:11,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:05:11,698 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-07-13 20:05:11,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:11,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479017670] [2021-07-13 20:05:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479017670] [2021-07-13 20:05:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479017670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236422781] [2021-07-13 20:05:11,756 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 [2021-07-13 20:05:11,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:11,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236422781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:11,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:05:11,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804918885] [2021-07-13 20:05:11,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:05:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:05:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:05:11,883 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:12,042 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-07-13 20:05:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:05:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:12,062 INFO L225 Difference]: With dead ends: 10295 [2021-07-13 20:05:12,063 INFO L226 Difference]: Without dead ends: 10247 [2021-07-13 20:05:12,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-07-13 20:05:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-07-13 20:05:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-07-13 20:05:12,208 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-07-13 20:05:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:12,208 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-07-13 20:05:12,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-07-13 20:05:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:12,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:12,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:12,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:05:12,421 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-07-13 20:05:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705815546] [2021-07-13 20:05:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:12,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705815546] [2021-07-13 20:05:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705815546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453469086] [2021-07-13 20:05:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:12,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453469086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:12,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:12,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:05:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531915958] [2021-07-13 20:05:12,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:05:12,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:05:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:12,612 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:12,818 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-07-13 20:05:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:12,839 INFO L225 Difference]: With dead ends: 10743 [2021-07-13 20:05:12,840 INFO L226 Difference]: Without dead ends: 10695 [2021-07-13 20:05:12,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-07-13 20:05:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-07-13 20:05:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-07-13 20:05:13,014 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-07-13 20:05:13,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:13,014 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-07-13 20:05:13,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-07-13 20:05:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:13,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:13,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:13,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:05:13,240 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-07-13 20:05:13,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:13,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261581293] [2021-07-13 20:05:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:13,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261581293] [2021-07-13 20:05:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261581293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:13,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237886195] [2021-07-13 20:05:13,296 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 [2021-07-13 20:05:13,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:13,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237886195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:13,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:13,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:05:13,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713125555] [2021-07-13 20:05:13,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:05:13,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:05:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:13,432 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:13,711 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-07-13 20:05:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:13,737 INFO L225 Difference]: With dead ends: 10785 [2021-07-13 20:05:13,737 INFO L226 Difference]: Without dead ends: 10737 [2021-07-13 20:05:13,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-07-13 20:05:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-07-13 20:05:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-07-13 20:05:13,900 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-07-13 20:05:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:13,900 INFO L482 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-07-13 20:05:13,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-07-13 20:05:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:13,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:13,913 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:14,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:05:14,113 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-07-13 20:05:14,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:14,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132194246] [2021-07-13 20:05:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132194246] [2021-07-13 20:05:14,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132194246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134433439] [2021-07-13 20:05:14,166 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 [2021-07-13 20:05:14,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:05:14,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134433439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:14,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:14,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080404714] [2021-07-13 20:05:14,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:14,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:14,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:14,271 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:05:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:14,434 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-07-13 20:05:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 [2021-07-13 20:05:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:14,450 INFO L225 Difference]: With dead ends: 8314 [2021-07-13 20:05:14,450 INFO L226 Difference]: Without dead ends: 8255 [2021-07-13 20:05:14,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:05:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-07-13 20:05:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-07-13 20:05:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-07-13 20:05:14,603 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-07-13 20:05:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:14,603 INFO L482 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-07-13 20:05:14,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:05:14,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-07-13 20:05:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:14,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:14,615 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:14,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:05:14,829 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-07-13 20:05:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362539583] [2021-07-13 20:05:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:14,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362539583] [2021-07-13 20:05:14,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362539583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913437821] [2021-07-13 20:05:14,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:14,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:14,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913437821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:14,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:05:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647137293] [2021-07-13 20:05:14,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:14,998 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:15,187 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-07-13 20:05:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:05:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:15,208 INFO L225 Difference]: With dead ends: 10367 [2021-07-13 20:05:15,208 INFO L226 Difference]: Without dead ends: 10321 [2021-07-13 20:05:15,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-07-13 20:05:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-07-13 20:05:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-07-13 20:05:15,348 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-07-13 20:05:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:15,348 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-07-13 20:05:15,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-07-13 20:05:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:15,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:15,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:15,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:15,561 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-07-13 20:05:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586627497] [2021-07-13 20:05:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:15,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586627497] [2021-07-13 20:05:15,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586627497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238230357] [2021-07-13 20:05:15,617 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 [2021-07-13 20:05:15,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:15,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238230357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:15,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:15,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:05:15,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105807885] [2021-07-13 20:05:15,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:05:15,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:15,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:05:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:05:15,762 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:16,023 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-07-13 20:05:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:16,023 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:16,045 INFO L225 Difference]: With dead ends: 10852 [2021-07-13 20:05:16,045 INFO L226 Difference]: Without dead ends: 10785 [2021-07-13 20:05:16,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-07-13 20:05:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-07-13 20:05:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-07-13 20:05:16,245 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-07-13 20:05:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:16,245 INFO L482 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-07-13 20:05:16,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-07-13 20:05:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:16,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:16,258 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:16,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 20:05:16,459 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:16,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-07-13 20:05:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:16,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514020523] [2021-07-13 20:05:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514020523] [2021-07-13 20:05:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514020523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193155597] [2021-07-13 20:05:16,534 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) [2021-07-13 20:05:16,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:16,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:16,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193155597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:16,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:16,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:16,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092441795] [2021-07-13 20:05:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:16,648 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:16,823 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-07-13 20:05:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:16,842 INFO L225 Difference]: With dead ends: 8303 [2021-07-13 20:05:16,843 INFO L226 Difference]: Without dead ends: 8248 [2021-07-13 20:05:16,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-07-13 20:05:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-07-13 20:05:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-07-13 20:05:17,007 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-07-13 20:05:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:17,008 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-07-13 20:05:17,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-07-13 20:05:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:17,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:17,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:17,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:17,221 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-07-13 20:05:17,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:17,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835396006] [2021-07-13 20:05:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:17,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835396006] [2021-07-13 20:05:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835396006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708347637] [2021-07-13 20:05:17,292 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 [2021-07-13 20:05:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708347637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:17,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:17,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:17,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094710590] [2021-07-13 20:05:17,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:17,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:17,407 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:17,612 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-07-13 20:05:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:05:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:17,635 INFO L225 Difference]: With dead ends: 10332 [2021-07-13 20:05:17,635 INFO L226 Difference]: Without dead ends: 10286 [2021-07-13 20:05:17,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-07-13 20:05:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-07-13 20:05:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-07-13 20:05:17,812 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-07-13 20:05:17,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:17,812 INFO L482 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-07-13 20:05:17,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-07-13 20:05:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:17,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:17,824 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:18,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:05:18,037 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-07-13 20:05:18,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:18,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126394854] [2021-07-13 20:05:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:18,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:18,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126394854] [2021-07-13 20:05:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126394854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:18,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660226053] [2021-07-13 20:05:18,114 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 [2021-07-13 20:05:18,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:18,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:18,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660226053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:18,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:18,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:18,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018002490] [2021-07-13 20:05:18,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:18,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:18,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:18,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:18,200 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:18,351 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-07-13 20:05:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:05:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:18,367 INFO L225 Difference]: With dead ends: 8275 [2021-07-13 20:05:18,367 INFO L226 Difference]: Without dead ends: 8232 [2021-07-13 20:05:18,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-07-13 20:05:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-07-13 20:05:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-07-13 20:05:18,509 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-07-13 20:05:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-07-13 20:05:18,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-07-13 20:05:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:18,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:18,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:18,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 20:05:18,721 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-07-13 20:05:18,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:18,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257352850] [2021-07-13 20:05:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:18,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:18,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257352850] [2021-07-13 20:05:18,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257352850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:18,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187712675] [2021-07-13 20:05:18,766 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 [2021-07-13 20:05:18,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:18,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187712675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:18,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:18,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:18,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028389528] [2021-07-13 20:05:18,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:18,836 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:19,053 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-07-13 20:05:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:19,074 INFO L225 Difference]: With dead ends: 10463 [2021-07-13 20:05:19,075 INFO L226 Difference]: Without dead ends: 10463 [2021-07-13 20:05:19,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-07-13 20:05:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-07-13 20:05:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-07-13 20:05:19,223 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-07-13 20:05:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:19,223 INFO L482 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-07-13 20:05:19,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-07-13 20:05:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:19,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:19,236 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:19,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:19,437 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-07-13 20:05:19,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:19,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665364798] [2021-07-13 20:05:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:19,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665364798] [2021-07-13 20:05:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665364798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074392528] [2021-07-13 20:05:19,478 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 [2021-07-13 20:05:19,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:19,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074392528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:19,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:19,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125520478] [2021-07-13 20:05:19,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:19,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:19,570 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:19,803 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-07-13 20:05:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:05:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:19,847 INFO L225 Difference]: With dead ends: 18599 [2021-07-13 20:05:19,847 INFO L226 Difference]: Without dead ends: 18599 [2021-07-13 20:05:19,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-07-13 20:05:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-07-13 20:05:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-07-13 20:05:20,139 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-07-13 20:05:20,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:20,139 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-07-13 20:05:20,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,139 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-07-13 20:05:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:20,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:20,159 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:20,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 20:05:20,359 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-07-13 20:05:20,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:20,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607173887] [2021-07-13 20:05:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:20,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:20,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607173887] [2021-07-13 20:05:20,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607173887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:20,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918232988] [2021-07-13 20:05:20,399 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 [2021-07-13 20:05:20,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:20,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918232988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:20,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:20,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79288199] [2021-07-13 20:05:20,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:20,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:20,478 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:20,680 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-07-13 20:05:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:20,714 INFO L225 Difference]: With dead ends: 14997 [2021-07-13 20:05:20,714 INFO L226 Difference]: Without dead ends: 14997 [2021-07-13 20:05:20,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-07-13 20:05:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-07-13 20:05:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-07-13 20:05:20,970 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-07-13 20:05:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-07-13 20:05:20,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-07-13 20:05:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:21,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:21,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:21,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:21,283 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:21,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-07-13 20:05:21,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:21,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307189366] [2021-07-13 20:05:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:21,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307189366] [2021-07-13 20:05:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307189366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459609699] [2021-07-13 20:05:21,323 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 [2021-07-13 20:05:21,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459609699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:05:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950813386] [2021-07-13 20:05:21,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:21,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:21,413 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:21,707 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-07-13 20:05:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:21,790 INFO L225 Difference]: With dead ends: 25256 [2021-07-13 20:05:21,790 INFO L226 Difference]: Without dead ends: 25256 [2021-07-13 20:05:21,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-07-13 20:05:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-07-13 20:05:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-07-13 20:05:22,154 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-07-13 20:05:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:22,154 INFO L482 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-07-13 20:05:22,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-07-13 20:05:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:22,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:22,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:22,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:05:22,373 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-07-13 20:05:22,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:22,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572907038] [2021-07-13 20:05:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572907038] [2021-07-13 20:05:22,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572907038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263833770] [2021-07-13 20:05:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:22,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263833770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:22,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:22,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:22,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421754074] [2021-07-13 20:05:22,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:22,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:22,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:22,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:22,516 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:22,791 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-07-13 20:05:22,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:05:22,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:22,846 INFO L225 Difference]: With dead ends: 21867 [2021-07-13 20:05:22,846 INFO L226 Difference]: Without dead ends: 21867 [2021-07-13 20:05:22,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-07-13 20:05:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-07-13 20:05:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-07-13 20:05:23,274 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-07-13 20:05:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:23,274 INFO L482 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-07-13 20:05:23,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-07-13 20:05:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:23,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:23,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:23,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:05:23,493 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-07-13 20:05:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:23,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415780394] [2021-07-13 20:05:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:23,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:23,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415780394] [2021-07-13 20:05:23,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415780394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:23,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260334299] [2021-07-13 20:05:23,536 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 [2021-07-13 20:05:23,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:23,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:23,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:23,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260334299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:23,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:23,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:05:23,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155618270] [2021-07-13 20:05:23,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:05:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:05:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:05:23,655 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:24,055 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-07-13 20:05:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:24,127 INFO L225 Difference]: With dead ends: 27150 [2021-07-13 20:05:24,127 INFO L226 Difference]: Without dead ends: 27144 [2021-07-13 20:05:24,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-07-13 20:05:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-07-13 20:05:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-07-13 20:05:24,509 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-07-13 20:05:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:24,509 INFO L482 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-07-13 20:05:24,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-07-13 20:05:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:24,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:24,531 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:24,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:24,731 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-07-13 20:05:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:24,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605905516] [2021-07-13 20:05:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:24,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605905516] [2021-07-13 20:05:24,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605905516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579565398] [2021-07-13 20:05:24,780 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 [2021-07-13 20:05:24,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:05:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:24,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579565398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:24,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:24,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:05:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192075720] [2021-07-13 20:05:24,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:24,941 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:25,316 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-07-13 20:05:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:05:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-07-13 20:05:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:25,371 INFO L225 Difference]: With dead ends: 22680 [2021-07-13 20:05:25,371 INFO L226 Difference]: Without dead ends: 22680 [2021-07-13 20:05:25,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-07-13 20:05:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-07-13 20:05:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-07-13 20:05:25,833 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-07-13 20:05:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:25,833 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-07-13 20:05:25,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-07-13 20:05:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:25,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:25,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:26,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 20:05:26,058 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:26,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-07-13 20:05:26,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:26,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113417438] [2021-07-13 20:05:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:26,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:26,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113417438] [2021-07-13 20:05:26,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113417438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:26,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502821880] [2021-07-13 20:05:26,096 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 [2021-07-13 20:05:26,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:26,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502821880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:26,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:26,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:26,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669182760] [2021-07-13 20:05:26,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:26,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:26,189 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:26,510 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-07-13 20:05:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:26,563 INFO L225 Difference]: With dead ends: 19297 [2021-07-13 20:05:26,564 INFO L226 Difference]: Without dead ends: 19297 [2021-07-13 20:05:26,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-07-13 20:05:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-07-13 20:05:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-07-13 20:05:26,932 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-07-13 20:05:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:26,932 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-07-13 20:05:26,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-07-13 20:05:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:26,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:26,954 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:27,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:05:27,154 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-07-13 20:05:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:27,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469226806] [2021-07-13 20:05:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:27,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469226806] [2021-07-13 20:05:27,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469226806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263791259] [2021-07-13 20:05:27,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:05:27,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263791259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:27,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833838923] [2021-07-13 20:05:27,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:27,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:27,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:27,280 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:27,567 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-07-13 20:05:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:27,660 INFO L225 Difference]: With dead ends: 33945 [2021-07-13 20:05:27,661 INFO L226 Difference]: Without dead ends: 33935 [2021-07-13 20:05:27,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-07-13 20:05:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-07-13 20:05:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-07-13 20:05:28,442 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-07-13 20:05:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:28,442 INFO L482 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-07-13 20:05:28,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-07-13 20:05:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:28,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:28,473 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:28,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:05:28,674 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-07-13 20:05:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721175500] [2021-07-13 20:05:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:28,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:28,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721175500] [2021-07-13 20:05:28,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721175500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:28,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188522163] [2021-07-13 20:05:28,725 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 [2021-07-13 20:05:28,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:05:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188522163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:28,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:28,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785060770] [2021-07-13 20:05:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:28,810 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:29,107 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-07-13 20:05:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:29,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:29,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:29,180 INFO L225 Difference]: With dead ends: 26734 [2021-07-13 20:05:29,180 INFO L226 Difference]: Without dead ends: 26734 [2021-07-13 20:05:29,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-07-13 20:05:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-07-13 20:05:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-07-13 20:05:29,693 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-07-13 20:05:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:29,693 INFO L482 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-07-13 20:05:29,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-07-13 20:05:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:29,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:29,724 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:29,924 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-07-13 20:05:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160961411] [2021-07-13 20:05:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:29,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:29,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160961411] [2021-07-13 20:05:29,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160961411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:29,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348676147] [2021-07-13 20:05:29,945 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 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 [2021-07-13 20:05:29,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:30,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348676147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:30,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:30,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:30,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475716188] [2021-07-13 20:05:30,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:30,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:30,033 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:30,325 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-07-13 20:05:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:30,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:30,402 INFO L225 Difference]: With dead ends: 27275 [2021-07-13 20:05:30,402 INFO L226 Difference]: Without dead ends: 27223 [2021-07-13 20:05:30,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-07-13 20:05:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-07-13 20:05:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-07-13 20:05:31,053 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-07-13 20:05:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:31,053 INFO L482 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-07-13 20:05:31,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-07-13 20:05:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:31,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:31,083 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:31,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:31,284 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-07-13 20:05:31,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:31,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327469103] [2021-07-13 20:05:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:31,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:31,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327469103] [2021-07-13 20:05:31,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327469103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:31,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138049355] [2021-07-13 20:05:31,306 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 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 [2021-07-13 20:05:31,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:31,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:31,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138049355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:31,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:31,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241307636] [2021-07-13 20:05:31,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:31,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:31,392 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:31,679 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-07-13 20:05:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:31,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:31,754 INFO L225 Difference]: With dead ends: 26807 [2021-07-13 20:05:31,754 INFO L226 Difference]: Without dead ends: 26797 [2021-07-13 20:05:31,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-07-13 20:05:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-07-13 20:05:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-07-13 20:05:32,273 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-07-13 20:05:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:32,274 INFO L482 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-07-13 20:05:32,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-07-13 20:05:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:32,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:32,304 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:32,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:32,505 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-07-13 20:05:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475399445] [2021-07-13 20:05:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:32,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:32,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475399445] [2021-07-13 20:05:32,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475399445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:32,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129202960] [2021-07-13 20:05:32,543 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 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 [2021-07-13 20:05:32,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129202960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:32,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:32,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474481754] [2021-07-13 20:05:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:32,660 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:32,994 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-07-13 20:05:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:33,069 INFO L225 Difference]: With dead ends: 26602 [2021-07-13 20:05:33,069 INFO L226 Difference]: Without dead ends: 26542 [2021-07-13 20:05:33,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:05:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-07-13 20:05:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-07-13 20:05:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:33,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-07-13 20:05:33,727 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-07-13 20:05:33,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:33,727 INFO L482 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-07-13 20:05:33,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-07-13 20:05:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:33,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:33,757 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:33,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:33,958 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-07-13 20:05:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:33,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095266961] [2021-07-13 20:05:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:33,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095266961] [2021-07-13 20:05:33,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095266961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523010773] [2021-07-13 20:05:33,987 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 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 [2021-07-13 20:05:34,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:34,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:34,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523010773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:34,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:34,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657094657] [2021-07-13 20:05:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:34,068 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:34,323 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-07-13 20:05:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:34,396 INFO L225 Difference]: With dead ends: 26987 [2021-07-13 20:05:34,396 INFO L226 Difference]: Without dead ends: 26963 [2021-07-13 20:05:34,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-07-13 20:05:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-07-13 20:05:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-07-13 20:05:34,930 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-07-13 20:05:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:34,930 INFO L482 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-07-13 20:05:34,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-07-13 20:05:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:34,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:34,960 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:35,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 20:05:35,161 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-07-13 20:05:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:35,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871024815] [2021-07-13 20:05:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:35,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:35,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871024815] [2021-07-13 20:05:35,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871024815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:35,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966862870] [2021-07-13 20:05:35,195 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 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 [2021-07-13 20:05:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:35,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:35,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966862870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:35,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:35,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246940800] [2021-07-13 20:05:35,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:35,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:35,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:35,275 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:35,582 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-07-13 20:05:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:35,651 INFO L225 Difference]: With dead ends: 26543 [2021-07-13 20:05:35,652 INFO L226 Difference]: Without dead ends: 26533 [2021-07-13 20:05:35,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-07-13 20:05:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-07-13 20:05:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-07-13 20:05:36,345 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-07-13 20:05:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:36,345 INFO L482 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-07-13 20:05:36,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-07-13 20:05:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:36,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:36,379 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:36,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:36,580 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-07-13 20:05:36,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:36,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131120533] [2021-07-13 20:05:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:36,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:36,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131120533] [2021-07-13 20:05:36,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131120533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:36,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290496174] [2021-07-13 20:05:36,606 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 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 [2021-07-13 20:05:36,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:36,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:36,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290496174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:36,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:36,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 20:05:36,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850152602] [2021-07-13 20:05:36,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:36,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:36,696 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:05:36,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:36,986 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-07-13 20:05:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 23 [2021-07-13 20:05:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:37,066 INFO L225 Difference]: With dead ends: 26792 [2021-07-13 20:05:37,066 INFO L226 Difference]: Without dead ends: 26792 [2021-07-13 20:05:37,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:05:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-07-13 20:05:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-07-13 20:05:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-07-13 20:05:37,681 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-07-13 20:05:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:37,681 INFO L482 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-07-13 20:05:37,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-13 20:05:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-07-13 20:05:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:37,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:37,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:37,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:05:37,913 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-07-13 20:05:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:37,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140249443] [2021-07-13 20:05:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:37,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:37,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140249443] [2021-07-13 20:05:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140249443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:37,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012330241] [2021-07-13 20:05:37,971 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 [2021-07-13 20:05:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:37,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:37,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:38,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012330241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:38,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:38,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:38,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509690587] [2021-07-13 20:05:38,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:38,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:38,056 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:38,342 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-07-13 20:05:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:38,421 INFO L225 Difference]: With dead ends: 26475 [2021-07-13 20:05:38,422 INFO L226 Difference]: Without dead ends: 26404 [2021-07-13 20:05:38,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-07-13 20:05:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-07-13 20:05:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-07-13 20:05:38,919 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-07-13 20:05:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-07-13 20:05:38,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-07-13 20:05:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:38,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:38,950 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:39,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:39,153 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-07-13 20:05:39,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:39,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955863868] [2021-07-13 20:05:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:39,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955863868] [2021-07-13 20:05:39,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955863868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816295200] [2021-07-13 20:05:39,204 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 [2021-07-13 20:05:39,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:39,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816295200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:39,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:39,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896976385] [2021-07-13 20:05:39,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:39,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:39,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:39,489 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:05:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:39,796 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-07-13 20:05:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:05:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 [2021-07-13 20:05:39,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:39,882 INFO L225 Difference]: With dead ends: 33195 [2021-07-13 20:05:39,883 INFO L226 Difference]: Without dead ends: 33149 [2021-07-13 20:05:39,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-07-13 20:05:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-07-13 20:05:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-07-13 20:05:40,458 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-07-13 20:05:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:40,459 INFO L482 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-07-13 20:05:40,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:05:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-07-13 20:05:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:40,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:40,488 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:40,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:05:40,688 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-07-13 20:05:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:40,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010896244] [2021-07-13 20:05:40,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:40,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:40,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010896244] [2021-07-13 20:05:40,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010896244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:40,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768042886] [2021-07-13 20:05:40,739 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 [2021-07-13 20:05:40,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:05:40,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:40,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:40,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768042886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:40,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:40,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:05:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022779186] [2021-07-13 20:05:40,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:40,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:40,862 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:41,646 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-07-13 20:05:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:05:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-07-13 20:05:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:41,733 INFO L225 Difference]: With dead ends: 33827 [2021-07-13 20:05:41,733 INFO L226 Difference]: Without dead ends: 33589 [2021-07-13 20:05:41,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:05:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-07-13 20:05:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-07-13 20:05:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-07-13 20:05:42,308 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-07-13 20:05:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:42,308 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-07-13 20:05:42,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-07-13 20:05:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-07-13 20:05:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:42,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:42,338 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:42,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:42,539 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-07-13 20:05:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32541984] [2021-07-13 20:05:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:42,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32541984] [2021-07-13 20:05:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32541984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359128049] [2021-07-13 20:05:42,597 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 [2021-07-13 20:05:42,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359128049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:42,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:42,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:05:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953844343] [2021-07-13 20:05:42,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:42,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:42,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:42,671 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:05:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:42,905 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-07-13 20:05:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-07-13 20:05:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:42,975 INFO L225 Difference]: With dead ends: 26465 [2021-07-13 20:05:42,975 INFO L226 Difference]: Without dead ends: 26406 [2021-07-13 20:05:42,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-07-13 20:05:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-07-13 20:05:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-07-13 20:05:43,491 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-07-13 20:05:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:43,492 INFO L482 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-07-13 20:05:43,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:05:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-07-13 20:05:43,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:43,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:43,522 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:43,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:43,723 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-07-13 20:05:43,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:43,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41006245] [2021-07-13 20:05:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:43,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41006245] [2021-07-13 20:05:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41006245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766189784] [2021-07-13 20:05:43,786 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 [2021-07-13 20:05:43,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:43,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766189784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:43,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:43,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905524886] [2021-07-13 20:05:43,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:43,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:43,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:43,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:43,886 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:44,206 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-07-13 20:05:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:05:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:44,416 INFO L225 Difference]: With dead ends: 33157 [2021-07-13 20:05:44,416 INFO L226 Difference]: Without dead ends: 33111 [2021-07-13 20:05:44,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-07-13 20:05:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-07-13 20:05:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-07-13 20:05:44,923 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-07-13 20:05:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:44,923 INFO L482 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-07-13 20:05:44,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-07-13 20:05:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:44,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:44,952 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:45,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 20:05:45,153 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-07-13 20:05:45,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:45,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612002992] [2021-07-13 20:05:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:45,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612002992] [2021-07-13 20:05:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612002992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183503410] [2021-07-13 20:05:45,235 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 [2021-07-13 20:05:45,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:45,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:45,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183503410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:45,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:45,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:05:45,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725400934] [2021-07-13 20:05:45,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:45,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:45,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:45,311 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:45,579 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-07-13 20:05:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:45,652 INFO L225 Difference]: With dead ends: 26430 [2021-07-13 20:05:45,652 INFO L226 Difference]: Without dead ends: 26387 [2021-07-13 20:05:45,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-07-13 20:05:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-07-13 20:05:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-07-13 20:05:46,172 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-07-13 20:05:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:46,172 INFO L482 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-07-13 20:05:46,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-07-13 20:05:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:46,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:46,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:46,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:05:46,403 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:46,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-07-13 20:05:46,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:46,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742739896] [2021-07-13 20:05:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:46,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742739896] [2021-07-13 20:05:46,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742739896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77545644] [2021-07-13 20:05:46,447 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 [2021-07-13 20:05:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:46,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77545644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:46,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:46,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:05:46,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655452265] [2021-07-13 20:05:46,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:46,518 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:46,783 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-07-13 20:05:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:46,854 INFO L225 Difference]: With dead ends: 27397 [2021-07-13 20:05:46,854 INFO L226 Difference]: Without dead ends: 27397 [2021-07-13 20:05:46,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:05:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-07-13 20:05:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-07-13 20:05:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-07-13 20:05:47,476 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-07-13 20:05:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:47,476 INFO L482 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-07-13 20:05:47,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-07-13 20:05:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:47,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:47,505 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:47,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:47,710 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:47,710 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-07-13 20:05:47,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:47,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688237314] [2021-07-13 20:05:47,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:47,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688237314] [2021-07-13 20:05:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688237314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781307768] [2021-07-13 20:05:47,770 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 [2021-07-13 20:05:47,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:47,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781307768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:05:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081936091] [2021-07-13 20:05:47,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:47,881 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:48,336 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-07-13 20:05:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:48,466 INFO L225 Difference]: With dead ends: 42723 [2021-07-13 20:05:48,466 INFO L226 Difference]: Without dead ends: 42723 [2021-07-13 20:05:48,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-07-13 20:05:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-07-13 20:05:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-07-13 20:05:49,086 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-07-13 20:05:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:49,086 INFO L482 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-07-13 20:05:49,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-07-13 20:05:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:49,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:49,114 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:49,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:05:49,314 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-07-13 20:05:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:49,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393321464] [2021-07-13 20:05:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393321464] [2021-07-13 20:05:49,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393321464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424782492] [2021-07-13 20:05:49,363 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 [2021-07-13 20:05:49,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:49,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424782492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:49,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:05:49,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865370100] [2021-07-13 20:05:49,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:49,457 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:05:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:49,856 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-07-13 20:05:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:05:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-07-13 20:05:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:49,945 INFO L225 Difference]: With dead ends: 32944 [2021-07-13 20:05:49,946 INFO L226 Difference]: Without dead ends: 32944 [2021-07-13 20:05:49,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-07-13 20:05:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-07-13 20:05:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-07-13 20:05:50,687 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-07-13 20:05:50,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:50,687 INFO L482 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-07-13 20:05:50,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:05:50,687 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-07-13 20:05:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:50,719 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:50,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:50,919 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-07-13 20:05:50,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:50,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956210070] [2021-07-13 20:05:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:50,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:50,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956210070] [2021-07-13 20:05:50,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956210070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:50,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830010672] [2021-07-13 20:05:50,999 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 [2021-07-13 20:05:51,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:51,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830010672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:51,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:51,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:05:51,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140899091] [2021-07-13 20:05:51,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:51,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:51,080 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:05:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:51,340 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-07-13 20:05:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 23 [2021-07-13 20:05:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:51,408 INFO L225 Difference]: With dead ends: 26059 [2021-07-13 20:05:51,408 INFO L226 Difference]: Without dead ends: 26010 [2021-07-13 20:05:51,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-07-13 20:05:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-07-13 20:05:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-07-13 20:05:51,898 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-07-13 20:05:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:51,898 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-07-13 20:05:51,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-07-13 20:05:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-07-13 20:05:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:51,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:51,930 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:52,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 20:05:52,131 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:52,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-07-13 20:05:52,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:52,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260642976] [2021-07-13 20:05:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260642976] [2021-07-13 20:05:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260642976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853311660] [2021-07-13 20:05:52,210 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 [2021-07-13 20:05:52,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:52,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:52,525 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:05:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853311660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:52,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:05:52,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450904106] [2021-07-13 20:05:52,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:05:52,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:52,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:05:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:05:52,637 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:53,310 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-07-13 20:05:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:05:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:53,407 INFO L225 Difference]: With dead ends: 32792 [2021-07-13 20:05:53,407 INFO L226 Difference]: Without dead ends: 32673 [2021-07-13 20:05:53,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:05:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-07-13 20:05:53,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-07-13 20:05:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-07-13 20:05:54,044 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-07-13 20:05:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:54,044 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-07-13 20:05:54,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-07-13 20:05:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:54,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:54,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:54,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:54,289 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-07-13 20:05:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:54,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729943849] [2021-07-13 20:05:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:54,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:54,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729943849] [2021-07-13 20:05:54,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729943849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:54,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989219148] [2021-07-13 20:05:54,373 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 [2021-07-13 20:05:54,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:54,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989219148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:54,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:54,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:05:54,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647982852] [2021-07-13 20:05:54,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:54,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:54,447 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:54,830 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-07-13 20:05:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:05:54,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:54,898 INFO L225 Difference]: With dead ends: 26059 [2021-07-13 20:05:54,899 INFO L226 Difference]: Without dead ends: 26016 [2021-07-13 20:05:54,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-07-13 20:05:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-07-13 20:05:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-07-13 20:05:55,563 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-07-13 20:05:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:55,563 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-07-13 20:05:55,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-07-13 20:05:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:55,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:55,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:55,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:05:55,796 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-07-13 20:05:55,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:55,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018744084] [2021-07-13 20:05:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:55,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:55,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018744084] [2021-07-13 20:05:55,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018744084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:55,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146990328] [2021-07-13 20:05:55,839 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 [2021-07-13 20:05:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:55,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:55,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146990328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:55,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:55,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:05:55,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125436453] [2021-07-13 20:05:55,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:55,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:55,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:55,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:55,907 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:56,340 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-07-13 20:05:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:05:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:56,426 INFO L225 Difference]: With dead ends: 27582 [2021-07-13 20:05:56,426 INFO L226 Difference]: Without dead ends: 27582 [2021-07-13 20:05:56,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-07-13 20:05:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-07-13 20:05:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-07-13 20:05:57,177 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-07-13 20:05:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:57,177 INFO L482 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-07-13 20:05:57,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-07-13 20:05:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:57,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:57,336 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:57,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:57,552 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-07-13 20:05:57,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:57,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781599008] [2021-07-13 20:05:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781599008] [2021-07-13 20:05:57,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781599008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82798190] [2021-07-13 20:05:57,592 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 [2021-07-13 20:05:57,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:05:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82798190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:57,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:05:57,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418081626] [2021-07-13 20:05:57,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:05:57,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:05:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:05:57,686 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:05:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:58,070 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-07-13 20:05:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-07-13 20:05:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:58,166 INFO L225 Difference]: With dead ends: 35465 [2021-07-13 20:05:58,167 INFO L226 Difference]: Without dead ends: 35465 [2021-07-13 20:05:58,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:05:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-07-13 20:05:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-07-13 20:05:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-07-13 20:05:58,928 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-07-13 20:05:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:58,928 INFO L482 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-07-13 20:05:58,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:05:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-07-13 20:05:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:58,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:58,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:59,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:05:59,165 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-07-13 20:05:59,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:59,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289632864] [2021-07-13 20:05:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289632864] [2021-07-13 20:05:59,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289632864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197753191] [2021-07-13 20:05:59,245 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 [2021-07-13 20:05:59,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:05:59,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197753191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:59,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:05:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593127497] [2021-07-13 20:05:59,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:05:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:05:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:05:59,323 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:59,669 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-07-13 20:05:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:05:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:59,734 INFO L225 Difference]: With dead ends: 26050 [2021-07-13 20:05:59,734 INFO L226 Difference]: Without dead ends: 26007 [2021-07-13 20:05:59,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-07-13 20:06:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-07-13 20:06:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-07-13 20:06:00,273 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-07-13 20:06:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:00,273 INFO L482 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-07-13 20:06:00,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-07-13 20:06:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:00,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:00,305 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:00,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:00,506 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:00,506 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-07-13 20:06:00,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:00,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551309600] [2021-07-13 20:06:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551309600] [2021-07-13 20:06:00,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551309600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939392598] [2021-07-13 20:06:00,559 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 [2021-07-13 20:06:00,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:00,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939392598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:00,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:06:00,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000073004] [2021-07-13 20:06:00,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:00,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:00,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:00,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:00,627 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:01,039 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-07-13 20:06:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:06:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:01,115 INFO L225 Difference]: With dead ends: 29926 [2021-07-13 20:06:01,115 INFO L226 Difference]: Without dead ends: 29926 [2021-07-13 20:06:01,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:06:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-07-13 20:06:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-07-13 20:06:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-07-13 20:06:01,829 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-07-13 20:06:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:01,829 INFO L482 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-07-13 20:06:01,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-07-13 20:06:01,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:01,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:01,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:02,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:02,069 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-07-13 20:06:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:02,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189327789] [2021-07-13 20:06:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189327789] [2021-07-13 20:06:02,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189327789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419667265] [2021-07-13 20:06:02,104 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 [2021-07-13 20:06:02,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:06:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419667265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:02,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:06:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589887947] [2021-07-13 20:06:02,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:06:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:06:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:06:02,175 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:02,701 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-07-13 20:06:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:06:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:02,805 INFO L225 Difference]: With dead ends: 29526 [2021-07-13 20:06:02,805 INFO L226 Difference]: Without dead ends: 29526 [2021-07-13 20:06:02,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-07-13 20:06:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-07-13 20:06:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-07-13 20:06:03,536 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-07-13 20:06:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:03,536 INFO L482 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-07-13 20:06:03,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-07-13 20:06:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:03,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:03,571 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:03,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:06:03,771 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-07-13 20:06:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:03,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143034802] [2021-07-13 20:06:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:03,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:03,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143034802] [2021-07-13 20:06:03,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143034802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256288747] [2021-07-13 20:06:03,839 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 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 [2021-07-13 20:06:03,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:03,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:03,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256288747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:03,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:06:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419474092] [2021-07-13 20:06:03,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:03,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:03,910 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:04,089 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-07-13 20:06:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:04,317 INFO L225 Difference]: With dead ends: 29072 [2021-07-13 20:06:04,317 INFO L226 Difference]: Without dead ends: 29019 [2021-07-13 20:06:04,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-07-13 20:06:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-07-13 20:06:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-07-13 20:06:04,953 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-07-13 20:06:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:04,953 INFO L482 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-07-13 20:06:04,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-07-13 20:06:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:04,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:04,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:05,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:06:05,186 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-07-13 20:06:05,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:05,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418879948] [2021-07-13 20:06:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:05,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418879948] [2021-07-13 20:06:05,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418879948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405466762] [2021-07-13 20:06:05,218 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 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 [2021-07-13 20:06:05,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:06:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405466762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:05,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:06:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842975218] [2021-07-13 20:06:05,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:05,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:05,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:05,289 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:05,741 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-07-13 20:06:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:06:05,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:05,840 INFO L225 Difference]: With dead ends: 37800 [2021-07-13 20:06:05,840 INFO L226 Difference]: Without dead ends: 37800 [2021-07-13 20:06:05,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-07-13 20:06:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-07-13 20:06:06,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-07-13 20:06:06,430 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-07-13 20:06:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:06,430 INFO L482 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-07-13 20:06:06,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-07-13 20:06:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:06,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:06,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:06,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:06,657 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-07-13 20:06:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:06,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614211314] [2021-07-13 20:06:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:06,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614211314] [2021-07-13 20:06:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614211314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270533196] [2021-07-13 20:06:06,688 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 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 [2021-07-13 20:06:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:06:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:06,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270533196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:06,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:06:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589742090] [2021-07-13 20:06:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:06,759 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:07,213 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-07-13 20:06:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:06:07,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:07,300 INFO L225 Difference]: With dead ends: 28786 [2021-07-13 20:06:07,301 INFO L226 Difference]: Without dead ends: 28786 [2021-07-13 20:06:07,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:06:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-07-13 20:06:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-07-13 20:06:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-07-13 20:06:07,951 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-07-13 20:06:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:07,952 INFO L482 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-07-13 20:06:07,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-07-13 20:06:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:07,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:07,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:08,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:08,186 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-07-13 20:06:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:08,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224696020] [2021-07-13 20:06:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:08,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224696020] [2021-07-13 20:06:08,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224696020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464738762] [2021-07-13 20:06:08,227 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 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 [2021-07-13 20:06:08,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:08,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:06:08,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464738762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:08,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:08,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:06:08,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418336777] [2021-07-13 20:06:08,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:06:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:06:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:08,427 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:08,605 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-07-13 20:06:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:06:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:08,691 INFO L225 Difference]: With dead ends: 27858 [2021-07-13 20:06:08,691 INFO L226 Difference]: Without dead ends: 27777 [2021-07-13 20:06:08,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-07-13 20:06:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-07-13 20:06:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-07-13 20:06:09,283 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-07-13 20:06:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:09,284 INFO L482 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-07-13 20:06:09,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-07-13 20:06:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:09,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:09,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:09,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:09,640 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-07-13 20:06:09,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:09,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140613558] [2021-07-13 20:06:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140613558] [2021-07-13 20:06:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140613558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610342592] [2021-07-13 20:06:09,679 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 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 [2021-07-13 20:06:09,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:09,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:06:09,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610342592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:09,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:09,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:06:09,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193662783] [2021-07-13 20:06:09,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:09,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:09,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:09,758 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:10,191 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-07-13 20:06:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:06:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:10,314 INFO L225 Difference]: With dead ends: 38461 [2021-07-13 20:06:10,314 INFO L226 Difference]: Without dead ends: 38461 [2021-07-13 20:06:10,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-07-13 20:06:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-07-13 20:06:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-07-13 20:06:11,012 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-07-13 20:06:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:11,012 INFO L482 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-07-13 20:06:11,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-07-13 20:06:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:11,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:11,043 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:11,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:06:11,243 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:11,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-07-13 20:06:11,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:11,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150340718] [2021-07-13 20:06:11,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:11,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:11,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150340718] [2021-07-13 20:06:11,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150340718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:11,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613450788] [2021-07-13 20:06:11,293 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 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 [2021-07-13 20:06:11,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:11,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:11,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613450788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:11,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:11,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:06:11,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251187860] [2021-07-13 20:06:11,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:11,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:11,355 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:11,493 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-07-13 20:06:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:11,556 INFO L225 Difference]: With dead ends: 24924 [2021-07-13 20:06:11,556 INFO L226 Difference]: Without dead ends: 24835 [2021-07-13 20:06:11,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-07-13 20:06:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-07-13 20:06:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-07-13 20:06:12,270 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-07-13 20:06:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:12,270 INFO L482 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-07-13 20:06:12,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-07-13 20:06:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:12,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:12,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:12,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:06:12,507 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-07-13 20:06:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:12,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194095952] [2021-07-13 20:06:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:06:12,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194095952] [2021-07-13 20:06:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194095952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345459775] [2021-07-13 20:06:12,565 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 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 [2021-07-13 20:06:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:06:12,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345459775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:12,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:12,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:06:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991235780] [2021-07-13 20:06:12,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:12,638 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:12,841 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-07-13 20:06:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:12,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:12,912 INFO L225 Difference]: With dead ends: 24748 [2021-07-13 20:06:12,912 INFO L226 Difference]: Without dead ends: 24675 [2021-07-13 20:06:12,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-07-13 20:06:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-07-13 20:06:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-07-13 20:06:13,474 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-07-13 20:06:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,474 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-07-13 20:06:13,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-07-13 20:06:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:13,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,506 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:06:13,707 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-07-13 20:06:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831307581] [2021-07-13 20:06:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:13,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831307581] [2021-07-13 20:06:13,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831307581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297244716] [2021-07-13 20:06:13,743 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 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 [2021-07-13 20:06:13,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:13,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297244716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:13,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:06:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036282633] [2021-07-13 20:06:13,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:13,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:13,820 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:14,173 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-07-13 20:06:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:14,237 INFO L225 Difference]: With dead ends: 24905 [2021-07-13 20:06:14,238 INFO L226 Difference]: Without dead ends: 24844 [2021-07-13 20:06:14,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-07-13 20:06:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-07-13 20:06:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-07-13 20:06:14,743 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-07-13 20:06:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:14,743 INFO L482 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-07-13 20:06:14,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-07-13 20:06:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:14,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:14,775 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:14,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:06:14,976 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-07-13 20:06:14,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:14,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563289674] [2021-07-13 20:06:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:15,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563289674] [2021-07-13 20:06:15,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563289674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186698823] [2021-07-13 20:06:15,003 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 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 [2021-07-13 20:06:15,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:06:15,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186698823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:15,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:06:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680251942] [2021-07-13 20:06:15,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:15,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:15,096 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:06:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:15,721 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-07-13 20:06:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:06:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-07-13 20:06:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:15,970 INFO L225 Difference]: With dead ends: 66091 [2021-07-13 20:06:15,970 INFO L226 Difference]: Without dead ends: 66077 [2021-07-13 20:06:15,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:06:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-07-13 20:06:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-07-13 20:06:17,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-07-13 20:06:17,800 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-07-13 20:06:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:17,800 INFO L482 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-07-13 20:06:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:06:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-07-13 20:06:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:17,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:17,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:18,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:06:18,077 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:18,077 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-07-13 20:06:18,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:18,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090716529] [2021-07-13 20:06:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:18,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090716529] [2021-07-13 20:06:18,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090716529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:18,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895454583] [2021-07-13 20:06:18,129 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 [2021-07-13 20:06:18,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:06:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:18,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895454583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:18,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:18,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:06:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302351574] [2021-07-13 20:06:18,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:18,198 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:18,872 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-07-13 20:06:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,103 INFO L225 Difference]: With dead ends: 64761 [2021-07-13 20:06:19,103 INFO L226 Difference]: Without dead ends: 64712 [2021-07-13 20:06:19,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-07-13 20:06:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-07-13 20:06:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-07-13 20:06:20,836 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-07-13 20:06:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:20,836 INFO L482 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-07-13 20:06:20,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-07-13 20:06:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:20,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:20,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 20:06:21,122 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-07-13 20:06:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732573167] [2021-07-13 20:06:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732573167] [2021-07-13 20:06:21,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732573167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877776306] [2021-07-13 20:06:21,157 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 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 [2021-07-13 20:06:21,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877776306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:21,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:06:21,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397095047] [2021-07-13 20:06:21,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:21,235 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:22,377 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-07-13 20:06:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:06:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:23,111 INFO L225 Difference]: With dead ends: 123260 [2021-07-13 20:06:23,111 INFO L226 Difference]: Without dead ends: 123260 [2021-07-13 20:06:23,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-07-13 20:06:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-07-13 20:06:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-07-13 20:06:25,465 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-07-13 20:06:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:25,465 INFO L482 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-07-13 20:06:25,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-07-13 20:06:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:25,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:25,584 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:25,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:25,787 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:25,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:25,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-07-13 20:06:25,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:25,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896924270] [2021-07-13 20:06:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896924270] [2021-07-13 20:06:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896924270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102245348] [2021-07-13 20:06:25,853 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:06:25,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:26,185 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:06:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:26,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102245348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:26,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:26,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:06:26,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979691598] [2021-07-13 20:06:26,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:06:26,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:26,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:06:26,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:26,254 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:26,738 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-07-13 20:06:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:06:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:27,215 INFO L225 Difference]: With dead ends: 76364 [2021-07-13 20:06:27,215 INFO L226 Difference]: Without dead ends: 76324 [2021-07-13 20:06:27,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-07-13 20:06:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-07-13 20:06:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-07-13 20:06:29,223 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-07-13 20:06:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:29,223 INFO L482 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-07-13 20:06:29,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-07-13 20:06:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:29,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:29,355 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:29,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:29,555 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-07-13 20:06:29,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:29,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132420023] [2021-07-13 20:06:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:29,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132420023] [2021-07-13 20:06:29,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132420023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767718470] [2021-07-13 20:06:29,607 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 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 [2021-07-13 20:06:29,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:29,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:29,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767718470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:06:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057748116] [2021-07-13 20:06:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:06:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:06:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:29,672 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:30,391 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-07-13 20:06:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:06:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:30,882 INFO L225 Difference]: With dead ends: 77328 [2021-07-13 20:06:30,882 INFO L226 Difference]: Without dead ends: 77263 [2021-07-13 20:06:30,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-07-13 20:06:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-07-13 20:06:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-07-13 20:06:32,977 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-07-13 20:06:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:32,977 INFO L482 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-07-13 20:06:32,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-07-13 20:06:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:33,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:33,117 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:33,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:33,317 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-07-13 20:06:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408796895] [2021-07-13 20:06:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:33,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408796895] [2021-07-13 20:06:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408796895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576524842] [2021-07-13 20:06:33,364 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 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 [2021-07-13 20:06:33,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:06:33,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:33,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:33,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576524842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:33,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:33,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:06:33,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142086035] [2021-07-13 20:06:33,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:06:33,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:06:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:33,446 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:34,192 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-07-13 20:06:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:06:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:34,466 INFO L225 Difference]: With dead ends: 77024 [2021-07-13 20:06:34,466 INFO L226 Difference]: Without dead ends: 76999 [2021-07-13 20:06:34,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-07-13 20:06:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-07-13 20:06:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-07-13 20:06:36,459 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-07-13 20:06:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:36,459 INFO L482 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-07-13 20:06:36,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-07-13 20:06:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:36,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:36,583 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:36,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-07-13 20:06:36,784 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-07-13 20:06:36,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:36,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611866297] [2021-07-13 20:06:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:36,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:36,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611866297] [2021-07-13 20:06:36,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611866297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212156743] [2021-07-13 20:06:36,839 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 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 [2021-07-13 20:06:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212156743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:06:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320350258] [2021-07-13 20:06:36,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:06:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:06:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:36,912 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:37,696 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-07-13 20:06:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:06:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:37,973 INFO L225 Difference]: With dead ends: 77120 [2021-07-13 20:06:37,973 INFO L226 Difference]: Without dead ends: 77074 [2021-07-13 20:06:37,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-07-13 20:06:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-07-13 20:06:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-07-13 20:06:40,052 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-07-13 20:06:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:40,052 INFO L482 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-07-13 20:06:40,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-07-13 20:06:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:40,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:40,190 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:40,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:40,391 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-07-13 20:06:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:40,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253782344] [2021-07-13 20:06:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:40,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253782344] [2021-07-13 20:06:40,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253782344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:40,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495263354] [2021-07-13 20:06:40,464 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 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 [2021-07-13 20:06:40,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:40,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:40,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495263354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:40,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:40,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:06:40,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413469064] [2021-07-13 20:06:40,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:06:40,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:40,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:06:40,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:40,541 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:41,302 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-07-13 20:06:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:06:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:41,580 INFO L225 Difference]: With dead ends: 77628 [2021-07-13 20:06:41,580 INFO L226 Difference]: Without dead ends: 77580 [2021-07-13 20:06:41,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-07-13 20:06:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-07-13 20:06:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-07-13 20:06:43,575 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-07-13 20:06:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,575 INFO L482 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-07-13 20:06:43,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-07-13 20:06:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:43,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,709 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:43,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 20:06:43,910 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-07-13 20:06:43,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235092801] [2021-07-13 20:06:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235092801] [2021-07-13 20:06:43,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235092801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368921161] [2021-07-13 20:06:43,979 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 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 [2021-07-13 20:06:44,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368921161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:44,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:06:44,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415488260] [2021-07-13 20:06:44,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:06:44,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:06:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:44,048 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:44,814 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-07-13 20:06:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:06:44,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:45,078 INFO L225 Difference]: With dead ends: 79341 [2021-07-13 20:06:45,078 INFO L226 Difference]: Without dead ends: 79297 [2021-07-13 20:06:45,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-07-13 20:06:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-07-13 20:06:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-07-13 20:06:46,976 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-07-13 20:06:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:46,976 INFO L482 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-07-13 20:06:46,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-07-13 20:06:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:47,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:47,387 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:06:47,588 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-07-13 20:06:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969634539] [2021-07-13 20:06:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969634539] [2021-07-13 20:06:47,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969634539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644735872] [2021-07-13 20:06:47,622 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 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 [2021-07-13 20:06:47,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644735872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:47,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:06:47,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683507741] [2021-07-13 20:06:47,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:06:47,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:06:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:06:47,701 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:06:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:48,649 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-07-13 20:06:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:06:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-07-13 20:06:48,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:49,036 INFO L225 Difference]: With dead ends: 98993 [2021-07-13 20:06:49,037 INFO L226 Difference]: Without dead ends: 98979 [2021-07-13 20:06:49,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-07-13 20:06:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-07-13 20:06:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-07-13 20:06:50,348 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-07-13 20:06:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:50,348 INFO L482 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-07-13 20:06:50,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-07-13 20:06:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-07-13 20:06:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:50,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:50,379 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:50,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 20:06:50,580 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-07-13 20:06:50,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:50,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829744503] [2021-07-13 20:06:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829744503] [2021-07-13 20:06:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829744503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7968425] [2021-07-13 20:06:50,610 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 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 [2021-07-13 20:06:50,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7968425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:50,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:06:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635806095] [2021-07-13 20:06:50,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:06:50,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:06:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:06:50,705 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:51,112 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-07-13 20:06:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:06:51,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:51,449 INFO L225 Difference]: With dead ends: 52085 [2021-07-13 20:06:51,449 INFO L226 Difference]: Without dead ends: 52085 [2021-07-13 20:06:51,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-07-13 20:06:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-07-13 20:06:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-07-13 20:06:52,544 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-07-13 20:06:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:52,545 INFO L482 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-07-13 20:06:52,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-07-13 20:06:52,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:52,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:52,853 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:53,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:06:53,069 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-07-13 20:06:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:53,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001885653] [2021-07-13 20:06:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001885653] [2021-07-13 20:06:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001885653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75250498] [2021-07-13 20:06:53,098 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 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 [2021-07-13 20:06:53,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:06:53,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:53,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75250498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:06:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313739112] [2021-07-13 20:06:53,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:06:53,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:06:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:06:53,192 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:53,687 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-07-13 20:06:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:06:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:54,126 INFO L225 Difference]: With dead ends: 60283 [2021-07-13 20:06:54,126 INFO L226 Difference]: Without dead ends: 60283 [2021-07-13 20:06:54,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:06:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-07-13 20:06:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-07-13 20:06:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-07-13 20:06:55,200 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-07-13 20:06:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:55,200 INFO L482 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-07-13 20:06:55,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-07-13 20:06:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:55,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:55,482 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:55,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:55,682 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-07-13 20:06:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:55,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668015310] [2021-07-13 20:06:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:55,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668015310] [2021-07-13 20:06:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668015310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71055579] [2021-07-13 20:06:55,753 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 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 [2021-07-13 20:06:55,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:55,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71055579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:55,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:06:55,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166193695] [2021-07-13 20:06:55,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:06:55,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:06:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:06:55,874 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:06:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:56,351 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-07-13 20:06:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-07-13 20:06:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:56,508 INFO L225 Difference]: With dead ends: 49947 [2021-07-13 20:06:56,509 INFO L226 Difference]: Without dead ends: 49819 [2021-07-13 20:06:56,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-07-13 20:06:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-07-13 20:06:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-07-13 20:06:57,676 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-07-13 20:06:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:57,676 INFO L482 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-07-13 20:06:57,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:06:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-07-13 20:06:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:57,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:57,747 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:57,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:57,948 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-07-13 20:06:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:57,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008178501] [2021-07-13 20:06:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008178501] [2021-07-13 20:06:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008178501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082627760] [2021-07-13 20:06:58,006 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 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 [2021-07-13 20:06:58,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:58,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:58,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:58,288 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:06:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082627760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:06:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949352664] [2021-07-13 20:06:58,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:06:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:06:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:06:58,326 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:58,745 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-07-13 20:06:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:06:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:58,900 INFO L225 Difference]: With dead ends: 49466 [2021-07-13 20:06:58,901 INFO L226 Difference]: Without dead ends: 49403 [2021-07-13 20:06:58,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:06:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-07-13 20:06:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-07-13 20:06:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-07-13 20:07:00,111 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-07-13 20:07:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:00,111 INFO L482 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-07-13 20:07:00,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-07-13 20:07:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:00,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:00,186 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:00,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 20:07:00,386 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-07-13 20:07:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:00,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56155790] [2021-07-13 20:07:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56155790] [2021-07-13 20:07:00,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56155790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975189931] [2021-07-13 20:07:00,475 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 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 [2021-07-13 20:07:00,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:07:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:00,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975189931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:00,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:07:00,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045035652] [2021-07-13 20:07:00,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:00,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:00,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:00,612 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:01,313 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-07-13 20:07:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:07:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:01,481 INFO L225 Difference]: With dead ends: 50050 [2021-07-13 20:07:01,481 INFO L226 Difference]: Without dead ends: 49977 [2021-07-13 20:07:01,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-07-13 20:07:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-07-13 20:07:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-07-13 20:07:02,680 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-07-13 20:07:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:02,680 INFO L482 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-07-13 20:07:02,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-07-13 20:07:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:02,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:02,753 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:02,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:02,953 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-07-13 20:07:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:02,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795455965] [2021-07-13 20:07:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:03,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795455965] [2021-07-13 20:07:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795455965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601144237] [2021-07-13 20:07:03,009 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 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 [2021-07-13 20:07:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:03,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601144237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:03,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:07:03,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432809348] [2021-07-13 20:07:03,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:03,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:03,134 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:03,886 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-07-13 20:07:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:07:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:04,068 INFO L225 Difference]: With dead ends: 49588 [2021-07-13 20:07:04,068 INFO L226 Difference]: Without dead ends: 49563 [2021-07-13 20:07:04,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-07-13 20:07:04,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-07-13 20:07:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-07-13 20:07:05,287 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-07-13 20:07:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,288 INFO L482 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-07-13 20:07:05,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-07-13 20:07:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:05,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,364 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:05,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 20:07:05,566 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:05,566 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-07-13 20:07:05,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:05,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662751074] [2021-07-13 20:07:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662751074] [2021-07-13 20:07:05,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662751074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748085458] [2021-07-13 20:07:05,654 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 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 [2021-07-13 20:07:05,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748085458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:05,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:07:05,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960725201] [2021-07-13 20:07:05,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:07:05,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:05,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:07:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:05,780 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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) [2021-07-13 20:07:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,397 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-07-13 20:07:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:07:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 25 [2021-07-13 20:07:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:06,558 INFO L225 Difference]: With dead ends: 50065 [2021-07-13 20:07:06,559 INFO L226 Difference]: Without dead ends: 49947 [2021-07-13 20:07:06,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:07:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-07-13 20:07:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-07-13 20:07:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-07-13 20:07:07,853 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-07-13 20:07:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:07,853 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-07-13 20:07:07,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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) [2021-07-13 20:07:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-07-13 20:07:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:07,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:07,931 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:08,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:08,132 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-07-13 20:07:08,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:08,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087845209] [2021-07-13 20:07:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:08,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087845209] [2021-07-13 20:07:08,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087845209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177518991] [2021-07-13 20:07:08,190 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 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 [2021-07-13 20:07:08,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177518991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:08,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:07:08,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466582760] [2021-07-13 20:07:08,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:07:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:07:08,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:08,309 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:08,930 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-07-13 20:07:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:09,088 INFO L225 Difference]: With dead ends: 49758 [2021-07-13 20:07:09,088 INFO L226 Difference]: Without dead ends: 49695 [2021-07-13 20:07:09,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-07-13 20:07:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-07-13 20:07:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-07-13 20:07:10,335 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-07-13 20:07:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:10,335 INFO L482 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-07-13 20:07:10,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-07-13 20:07:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:10,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:10,414 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:10,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:07:10,614 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-07-13 20:07:10,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:10,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854802129] [2021-07-13 20:07:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:10,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854802129] [2021-07-13 20:07:10,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854802129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:10,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709865761] [2021-07-13 20:07:10,673 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 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 [2021-07-13 20:07:10,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:10,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:10,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709865761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:10,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:10,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:07:10,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714270287] [2021-07-13 20:07:10,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:07:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:07:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:07:10,803 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:11,471 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-07-13 20:07:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:11,535 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-07-13 20:07:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:11,690 INFO L225 Difference]: With dead ends: 50900 [2021-07-13 20:07:11,690 INFO L226 Difference]: Without dead ends: 50875 [2021-07-13 20:07:11,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:07:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-07-13 20:07:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-07-13 20:07:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-07-13 20:07:12,980 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-07-13 20:07:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:12,980 INFO L482 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-07-13 20:07:12,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-07-13 20:07:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:13,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:13,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:13,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-07-13 20:07:13,253 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:13,253 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-07-13 20:07:13,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:13,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933204656] [2021-07-13 20:07:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:13,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:13,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933204656] [2021-07-13 20:07:13,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933204656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270596755] [2021-07-13 20:07:13,285 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 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 [2021-07-13 20:07:13,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:07:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:13,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270596755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:13,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-13 20:07:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474224969] [2021-07-13 20:07:13,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:13,386 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,155 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-07-13 20:07:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,467 INFO L225 Difference]: With dead ends: 92519 [2021-07-13 20:07:14,467 INFO L226 Difference]: Without dead ends: 92495 [2021-07-13 20:07:14,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-07-13 20:07:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-07-13 20:07:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-07-13 20:07:16,654 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-07-13 20:07:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,654 INFO L482 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-07-13 20:07:16,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-07-13 20:07:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:17,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:17,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:17,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:07:17,311 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-07-13 20:07:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116996451] [2021-07-13 20:07:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:17,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116996451] [2021-07-13 20:07:17,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116996451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827938195] [2021-07-13 20:07:17,342 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 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 [2021-07-13 20:07:17,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:07:17,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:17,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:07:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827938195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:17,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 20:07:17,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911963557] [2021-07-13 20:07:17,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:07:17,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:07:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:17,436 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-07-13 20:07:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:18,609 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-07-13 20:07:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:07:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 [2021-07-13 20:07:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:19,418 INFO L225 Difference]: With dead ends: 137171 [2021-07-13 20:07:19,418 INFO L226 Difference]: Without dead ends: 137155 [2021-07-13 20:07:19,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:07:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-07-13 20:07:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-07-13 20:07:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-07-13 20:07:21,851 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-07-13 20:07:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:21,851 INFO L482 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-07-13 20:07:21,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-07-13 20:07:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-07-13 20:07:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:21,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:21,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:22,169 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-07-13 20:07:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968110533] [2021-07-13 20:07:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:22,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:22,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968110533] [2021-07-13 20:07:22,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968110533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750291183] [2021-07-13 20:07:22,238 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 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 [2021-07-13 20:07:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750291183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:22,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648243057] [2021-07-13 20:07:22,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:22,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:22,669 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:07:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:23,230 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-07-13 20:07:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:07:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:07:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:23,705 INFO L225 Difference]: With dead ends: 76022 [2021-07-13 20:07:23,705 INFO L226 Difference]: Without dead ends: 75973 [2021-07-13 20:07:23,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-07-13 20:07:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-07-13 20:07:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-07-13 20:07:25,739 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-07-13 20:07:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:25,739 INFO L482 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-07-13 20:07:25,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:07:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-07-13 20:07:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:25,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:25,890 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:26,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:26,091 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-07-13 20:07:26,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:26,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387248091] [2021-07-13 20:07:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387248091] [2021-07-13 20:07:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387248091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640282673] [2021-07-13 20:07:26,160 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 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 [2021-07-13 20:07:26,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:26,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:26,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640282673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:26,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:26,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907421214] [2021-07-13 20:07:26,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:26,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:26,252 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:07:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:27,038 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-07-13 20:07:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:07:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-13 20:07:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:27,308 INFO L225 Difference]: With dead ends: 76818 [2021-07-13 20:07:27,309 INFO L226 Difference]: Without dead ends: 76793 [2021-07-13 20:07:27,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-07-13 20:07:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-07-13 20:07:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-07-13 20:07:29,338 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-07-13 20:07:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:29,338 INFO L482 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-07-13 20:07:29,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-07-13 20:07:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-07-13 20:07:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:29,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:29,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:29,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:29,668 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-07-13 20:07:29,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:29,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147030583] [2021-07-13 20:07:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:29,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147030583] [2021-07-13 20:07:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147030583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:29,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125450854] [2021-07-13 20:07:29,729 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 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 [2021-07-13 20:07:29,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:29,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125450854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:29,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:29,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:07:29,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658421063] [2021-07-13 20:07:29,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:07:29,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:29,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:07:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:29,843 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:30,686 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-07-13 20:07:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:07:30,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:30,956 INFO L225 Difference]: With dead ends: 76411 [2021-07-13 20:07:30,957 INFO L226 Difference]: Without dead ends: 76386 [2021-07-13 20:07:30,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-07-13 20:07:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-07-13 20:07:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-07-13 20:07:32,910 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-07-13 20:07:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:32,911 INFO L482 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-07-13 20:07:32,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-07-13 20:07:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:33,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:33,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:33,229 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-07-13 20:07:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968822277] [2021-07-13 20:07:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968822277] [2021-07-13 20:07:33,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968822277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633555187] [2021-07-13 20:07:33,262 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 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 [2021-07-13 20:07:33,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:07:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633555187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:33,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-13 20:07:33,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014312319] [2021-07-13 20:07:33,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:07:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:07:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:07:33,347 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:34,154 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-07-13 20:07:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:07:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:34,418 INFO L225 Difference]: With dead ends: 81206 [2021-07-13 20:07:34,418 INFO L226 Difference]: Without dead ends: 81196 [2021-07-13 20:07:34,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-07-13 20:07:36,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-07-13 20:07:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-07-13 20:07:36,626 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-07-13 20:07:36,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:36,626 INFO L482 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-07-13 20:07:36,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:36,626 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-07-13 20:07:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:36,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:36,904 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:37,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 20:07:37,120 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-07-13 20:07:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:37,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862636584] [2021-07-13 20:07:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:37,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:37,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862636584] [2021-07-13 20:07:37,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862636584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399251825] [2021-07-13 20:07:37,212 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 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 [2021-07-13 20:07:37,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:07:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:37,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:37,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399251825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:37,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:37,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:37,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615891125] [2021-07-13 20:07:37,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:37,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:37,328 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:38,023 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-07-13 20:07:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:38,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:38,466 INFO L225 Difference]: With dead ends: 77680 [2021-07-13 20:07:38,466 INFO L226 Difference]: Without dead ends: 77600 [2021-07-13 20:07:38,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:07:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-07-13 20:07:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-07-13 20:07:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-07-13 20:07:40,518 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-07-13 20:07:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:40,518 INFO L482 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-07-13 20:07:40,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-07-13 20:07:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:40,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:40,647 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:40,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-13 20:07:40,849 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-07-13 20:07:40,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:40,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127369673] [2021-07-13 20:07:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:40,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127369673] [2021-07-13 20:07:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127369673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307752030] [2021-07-13 20:07:40,910 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 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 [2021-07-13 20:07:40,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:07:40,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:40,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307752030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:41,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816942184] [2021-07-13 20:07:41,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:41,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:41,001 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,880 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-07-13 20:07:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:42,155 INFO L225 Difference]: With dead ends: 78459 [2021-07-13 20:07:42,155 INFO L226 Difference]: Without dead ends: 78434 [2021-07-13 20:07:42,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:07:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-07-13 20:07:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-07-13 20:07:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-07-13 20:07:44,186 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-07-13 20:07:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:44,186 INFO L482 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-07-13 20:07:44,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-07-13 20:07:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:44,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:44,305 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:44,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:44,506 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-07-13 20:07:44,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:44,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264033547] [2021-07-13 20:07:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264033547] [2021-07-13 20:07:44,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264033547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825409172] [2021-07-13 20:07:44,579 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:07:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825409172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:44,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:07:44,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870445277] [2021-07-13 20:07:44,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:44,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:44,679 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:45,462 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-07-13 20:07:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:07:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:45,719 INFO L225 Difference]: With dead ends: 77563 [2021-07-13 20:07:45,719 INFO L226 Difference]: Without dead ends: 77530 [2021-07-13 20:07:45,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-07-13 20:07:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-07-13 20:07:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-07-13 20:07:47,737 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-07-13 20:07:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:47,737 INFO L482 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-07-13 20:07:47,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-07-13 20:07:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:48,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:48,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:48,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-07-13 20:07:48,431 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:48,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-07-13 20:07:48,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:48,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275834805] [2021-07-13 20:07:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275834805] [2021-07-13 20:07:48,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275834805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703487215] [2021-07-13 20:07:48,511 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 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 [2021-07-13 20:07:48,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:07:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703487215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:48,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:07:48,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453274418] [2021-07-13 20:07:48,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:07:48,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:07:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:07:48,636 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:49,584 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-07-13 20:07:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:07:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:07:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:49,853 INFO L225 Difference]: With dead ends: 77659 [2021-07-13 20:07:49,854 INFO L226 Difference]: Without dead ends: 77589 [2021-07-13 20:07:49,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-07-13 20:07:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-07-13 20:07:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-07-13 20:07:52,094 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-07-13 20:07:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:52,094 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-07-13 20:07:52,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-07-13 20:07:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:52,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:52,227 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:52,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:52,427 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:52,427 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-07-13 20:07:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:52,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198983358] [2021-07-13 20:07:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:52,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:52,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198983358] [2021-07-13 20:07:52,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198983358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:52,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591112523] [2021-07-13 20:07:52,518 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 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 [2021-07-13 20:07:52,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:52,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:07:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:52,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591112523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:52,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:52,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:07:52,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681802604] [2021-07-13 20:07:52,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:52,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:52,659 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:53,703 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-07-13 20:07:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:07:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:53,978 INFO L225 Difference]: With dead ends: 78113 [2021-07-13 20:07:53,978 INFO L226 Difference]: Without dead ends: 78039 [2021-07-13 20:07:53,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-07-13 20:07:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-07-13 20:07:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-07-13 20:07:56,010 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-07-13 20:07:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:56,010 INFO L482 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-07-13 20:07:56,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-07-13 20:07:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:07:56,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:56,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:56,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:56,654 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-07-13 20:07:56,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:56,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126190503] [2021-07-13 20:07:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:56,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126190503] [2021-07-13 20:07:56,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126190503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299174184] [2021-07-13 20:07:56,743 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 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 [2021-07-13 20:07:56,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:56,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:56,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:07:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299174184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:56,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:07:56,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930352397] [2021-07-13 20:07:56,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:07:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:07:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:07:56,866 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:57,830 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-07-13 20:07:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:07:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:07:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:58,082 INFO L225 Difference]: With dead ends: 77694 [2021-07-13 20:07:58,082 INFO L226 Difference]: Without dead ends: 77515 [2021-07-13 20:07:58,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:07:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-07-13 20:07:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-07-13 20:07:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-07-13 20:08:00,179 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-07-13 20:08:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:00,179 INFO L482 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-07-13 20:08:00,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-07-13 20:08:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:00,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:00,309 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:00,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:00,510 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:00,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:00,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-07-13 20:08:00,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:00,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279162613] [2021-07-13 20:08:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279162613] [2021-07-13 20:08:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279162613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328084844] [2021-07-13 20:08:00,576 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 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 [2021-07-13 20:08:00,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:00,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:00,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:08:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328084844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:08:00,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966987490] [2021-07-13 20:08:00,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:08:00,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:08:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:00,698 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:01,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:01,816 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-07-13 20:08:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:02,102 INFO L225 Difference]: With dead ends: 79339 [2021-07-13 20:08:02,102 INFO L226 Difference]: Without dead ends: 79274 [2021-07-13 20:08:02,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-07-13 20:08:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-07-13 20:08:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-07-13 20:08:04,471 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-07-13 20:08:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:04,472 INFO L482 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-07-13 20:08:04,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-07-13 20:08:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:04,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:04,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:04,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:04,812 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-07-13 20:08:04,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:04,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723677984] [2021-07-13 20:08:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:04,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723677984] [2021-07-13 20:08:04,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723677984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891438548] [2021-07-13 20:08:04,902 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 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 [2021-07-13 20:08:04,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:04,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:04,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:05,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891438548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:05,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:08:05,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403647886] [2021-07-13 20:08:05,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:05,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:05,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:05,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:05,053 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:06,129 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-07-13 20:08:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:08:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:06,465 INFO L225 Difference]: With dead ends: 94772 [2021-07-13 20:08:06,466 INFO L226 Difference]: Without dead ends: 94731 [2021-07-13 20:08:06,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:08:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-07-13 20:08:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-07-13 20:08:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-07-13 20:08:09,144 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-07-13 20:08:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-07-13 20:08:09,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-07-13 20:08:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:09,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:09,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:08:09,493 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-07-13 20:08:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:09,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729707827] [2021-07-13 20:08:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:09,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729707827] [2021-07-13 20:08:09,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729707827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440704713] [2021-07-13 20:08:09,601 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 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 [2021-07-13 20:08:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440704713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:09,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:08:09,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192066708] [2021-07-13 20:08:09,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:09,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:09,756 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 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) [2021-07-13 20:08:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:10,835 INFO L93 Difference]: Finished difference Result 94989 states and 343844 transitions. [2021-07-13 20:08:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:10,835 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 25 [2021-07-13 20:08:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:11,192 INFO L225 Difference]: With dead ends: 94989 [2021-07-13 20:08:11,192 INFO L226 Difference]: Without dead ends: 94948 [2021-07-13 20:08:11,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94948 states. [2021-07-13 20:08:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94948 to 77792. [2021-07-13 20:08:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77792 states, 77791 states have (on average 3.638647144271188) internal successors, (283054), 77791 states have internal predecessors, (283054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77792 states to 77792 states and 283054 transitions. [2021-07-13 20:08:13,666 INFO L78 Accepts]: Start accepts. Automaton has 77792 states and 283054 transitions. Word has length 25 [2021-07-13 20:08:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:13,666 INFO L482 AbstractCegarLoop]: Abstraction has 77792 states and 283054 transitions. [2021-07-13 20:08:13,667 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) [2021-07-13 20:08:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 77792 states and 283054 transitions. [2021-07-13 20:08:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:13,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:13,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:14,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:14,003 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-07-13 20:08:14,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:14,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810541957] [2021-07-13 20:08:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:14,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:14,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810541957] [2021-07-13 20:08:14,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810541957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:14,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529888515] [2021-07-13 20:08:14,107 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 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 [2021-07-13 20:08:14,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:14,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529888515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:14,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:14,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:08:14,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2347593] [2021-07-13 20:08:14,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:08:14,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:08:14,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:08:14,273 INFO L87 Difference]: Start difference. First operand 77792 states and 283054 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:15,887 INFO L93 Difference]: Finished difference Result 89830 states and 327389 transitions. [2021-07-13 20:08:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:08:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:16,403 INFO L225 Difference]: With dead ends: 89830 [2021-07-13 20:08:16,403 INFO L226 Difference]: Without dead ends: 89585 [2021-07-13 20:08:16,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:08:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89585 states. [2021-07-13 20:08:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89585 to 77799. [2021-07-13 20:08:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-07-13 20:08:18,720 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-07-13 20:08:18,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:18,720 INFO L482 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-07-13 20:08:18,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,720 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-07-13 20:08:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:18,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:18,848 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:19,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:19,049 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 75 times [2021-07-13 20:08:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:19,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382042537] [2021-07-13 20:08:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:19,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382042537] [2021-07-13 20:08:19,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382042537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184203303] [2021-07-13 20:08:19,124 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 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 [2021-07-13 20:08:19,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:19,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184203303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:19,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:08:19,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751297705] [2021-07-13 20:08:19,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:08:19,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:08:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:19,267 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:20,326 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-07-13 20:08:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:08:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:20,849 INFO L225 Difference]: With dead ends: 94982 [2021-07-13 20:08:20,849 INFO L226 Difference]: Without dead ends: 94949 [2021-07-13 20:08:20,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:08:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-07-13 20:08:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-07-13 20:08:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-07-13 20:08:23,044 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-07-13 20:08:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,044 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-07-13 20:08:23,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-07-13 20:08:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:23,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,179 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:23,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:23,379 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 76 times [2021-07-13 20:08:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:23,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874032300] [2021-07-13 20:08:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:23,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:23,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874032300] [2021-07-13 20:08:23,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874032300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099156362] [2021-07-13 20:08:23,466 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 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 [2021-07-13 20:08:23,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:23,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099156362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:23,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:08:23,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636784638] [2021-07-13 20:08:23,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:23,636 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:08:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:24,923 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-07-13 20:08:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:08:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-13 20:08:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:25,264 INFO L225 Difference]: With dead ends: 95030 [2021-07-13 20:08:25,264 INFO L226 Difference]: Without dead ends: 95001 [2021-07-13 20:08:25,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-07-13 20:08:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-07-13 20:08:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-07-13 20:08:27,415 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-07-13 20:08:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-07-13 20:08:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:08:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-07-13 20:08:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:27,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:27,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,739 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 77 times [2021-07-13 20:08:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712419237] [2021-07-13 20:08:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712419237] [2021-07-13 20:08:27,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712419237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338551381] [2021-07-13 20:08:27,819 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 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 [2021-07-13 20:08:27,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:27,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338551381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:27,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:08:27,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233433780] [2021-07-13 20:08:27,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:27,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:27,993 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:29,499 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-07-13 20:08:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:29,832 INFO L225 Difference]: With dead ends: 88722 [2021-07-13 20:08:29,833 INFO L226 Difference]: Without dead ends: 88697 [2021-07-13 20:08:29,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 830.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:08:29,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-07-13 20:08:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-07-13 20:08:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-07-13 20:08:31,972 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-07-13 20:08:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:31,972 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-07-13 20:08:31,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-07-13 20:08:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:32,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:32,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:32,297 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 78 times [2021-07-13 20:08:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:32,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007107756] [2021-07-13 20:08:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:32,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007107756] [2021-07-13 20:08:32,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007107756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010757487] [2021-07-13 20:08:32,382 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 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 [2021-07-13 20:08:32,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:32,802 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 20:08:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:32,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010757487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:32,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:32,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:08:32,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215385700] [2021-07-13 20:08:32,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:32,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:32,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:32,829 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:08:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:33,953 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-07-13 20:08:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:08:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-13 20:08:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:34,296 INFO L225 Difference]: With dead ends: 94397 [2021-07-13 20:08:34,296 INFO L226 Difference]: Without dead ends: 94360 [2021-07-13 20:08:34,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-07-13 20:08:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-07-13 20:08:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-07-13 20:08:36,468 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-07-13 20:08:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:36,469 INFO L482 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-07-13 20:08:36,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:08:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-07-13 20:08:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:36,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:36,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:36,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:36,791 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:36,792 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 79 times [2021-07-13 20:08:36,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:36,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943330855] [2021-07-13 20:08:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943330855] [2021-07-13 20:08:37,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943330855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936676019] [2021-07-13 20:08:37,179 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 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 [2021-07-13 20:08:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936676019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:37,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:08:37,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950873070] [2021-07-13 20:08:37,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:37,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:37,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:37,382 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:38,823 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-07-13 20:08:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:08:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:39,215 INFO L225 Difference]: With dead ends: 106020 [2021-07-13 20:08:39,215 INFO L226 Difference]: Without dead ends: 105968 [2021-07-13 20:08:39,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:08:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-07-13 20:08:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-07-13 20:08:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-07-13 20:08:41,844 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-07-13 20:08:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:41,844 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-07-13 20:08:41,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:41,844 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-07-13 20:08:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:41,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:41,977 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:42,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 20:08:42,193 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 80 times [2021-07-13 20:08:42,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:42,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361128385] [2021-07-13 20:08:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:42,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:42,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361128385] [2021-07-13 20:08:42,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361128385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876639612] [2021-07-13 20:08:42,285 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 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 [2021-07-13 20:08:42,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:42,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:42,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876639612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:42,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:08:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462471436] [2021-07-13 20:08:42,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:08:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:08:42,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:08:42,507 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:43,920 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-07-13 20:08:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:08:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:44,460 INFO L225 Difference]: With dead ends: 96396 [2021-07-13 20:08:44,460 INFO L226 Difference]: Without dead ends: 96342 [2021-07-13 20:08:44,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:08:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-07-13 20:08:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-07-13 20:08:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-07-13 20:08:46,677 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-07-13 20:08:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:46,677 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-07-13 20:08:46,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-07-13 20:08:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:46,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:46,808 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:47,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:47,008 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 81 times [2021-07-13 20:08:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:47,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839592280] [2021-07-13 20:08:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839592280] [2021-07-13 20:08:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839592280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651968188] [2021-07-13 20:08:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:47,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:08:47,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:08:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651968188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:47,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:08:47,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704134255] [2021-07-13 20:08:47,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:08:47,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:08:47,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:47,231 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 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) [2021-07-13 20:08:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:48,148 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-07-13 20:08:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:08:48,149 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 [2021-07-13 20:08:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:48,455 INFO L225 Difference]: With dead ends: 85565 [2021-07-13 20:08:48,456 INFO L226 Difference]: Without dead ends: 85370 [2021-07-13 20:08:48,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:08:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-07-13 20:08:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-07-13 20:08:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-07-13 20:08:50,818 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-07-13 20:08:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:50,818 INFO L482 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-07-13 20:08:50,819 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) [2021-07-13 20:08:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-07-13 20:08:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:50,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:50,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:51,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-13 20:08:51,161 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 82 times [2021-07-13 20:08:51,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:51,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510103325] [2021-07-13 20:08:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:51,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:51,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510103325] [2021-07-13 20:08:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510103325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123378942] [2021-07-13 20:08:51,222 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 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 [2021-07-13 20:08:51,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:51,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:51,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:08:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:51,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123378942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:51,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:08:51,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234711946] [2021-07-13 20:08:51,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:08:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:08:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:08:51,334 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:52,186 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-07-13 20:08:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:08:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:52,499 INFO L225 Difference]: With dead ends: 79701 [2021-07-13 20:08:52,499 INFO L226 Difference]: Without dead ends: 79594 [2021-07-13 20:08:52,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:08:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-07-13 20:08:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-07-13 20:08:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-07-13 20:08:54,474 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-07-13 20:08:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:54,474 INFO L482 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-07-13 20:08:54,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-07-13 20:08:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:54,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:54,596 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:54,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 20:08:54,796 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 83 times [2021-07-13 20:08:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:54,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831762482] [2021-07-13 20:08:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831762482] [2021-07-13 20:08:54,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831762482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408954074] [2021-07-13 20:08:54,849 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 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 [2021-07-13 20:08:54,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:08:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408954074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:55,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:08:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202160868] [2021-07-13 20:08:55,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:08:55,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:08:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:08:55,274 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:56,658 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-07-13 20:08:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:08:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:08:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:56,966 INFO L225 Difference]: With dead ends: 93002 [2021-07-13 20:08:56,967 INFO L226 Difference]: Without dead ends: 92906 [2021-07-13 20:08:56,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 774.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:08:57,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-07-13 20:08:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-07-13 20:08:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-07-13 20:08:59,377 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-07-13 20:08:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:59,377 INFO L482 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-07-13 20:08:59,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-07-13 20:08:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:08:59,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:59,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:59,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:08:59,718 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 84 times [2021-07-13 20:08:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:59,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777482599] [2021-07-13 20:08:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:59,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:59,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777482599] [2021-07-13 20:08:59,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777482599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090699538] [2021-07-13 20:08:59,802 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 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 [2021-07-13 20:08:59,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:08:59,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:08:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090699538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:59,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:08:59,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244383710] [2021-07-13 20:08:59,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:08:59,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:59,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:08:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:08:59,940 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:01,016 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-07-13 20:09:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:09:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:01,384 INFO L225 Difference]: With dead ends: 101778 [2021-07-13 20:09:01,384 INFO L226 Difference]: Without dead ends: 101745 [2021-07-13 20:09:01,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-07-13 20:09:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-07-13 20:09:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-07-13 20:09:03,884 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-07-13 20:09:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:03,884 INFO L482 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-07-13 20:09:03,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-07-13 20:09:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:04,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:04,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:04,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,224 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 85 times [2021-07-13 20:09:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51881023] [2021-07-13 20:09:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51881023] [2021-07-13 20:09:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51881023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204330987] [2021-07-13 20:09:04,323 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:09:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204330987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:04,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:09:04,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867194608] [2021-07-13 20:09:04,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:09:04,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:04,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:09:04,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:09:04,489 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 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) [2021-07-13 20:09:04,997 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-07-13 20:09:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:05,883 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-07-13 20:09:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:09:05,883 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 25 [2021-07-13 20:09:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:06,262 INFO L225 Difference]: With dead ends: 103177 [2021-07-13 20:09:06,263 INFO L226 Difference]: Without dead ends: 103066 [2021-07-13 20:09:06,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:09:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-07-13 20:09:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-07-13 20:09:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-07-13 20:09:08,499 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-07-13 20:09:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:08,499 INFO L482 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-07-13 20:09:08,500 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) [2021-07-13 20:09:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-07-13 20:09:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:08,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:08,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:09,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 20:09:09,147 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 86 times [2021-07-13 20:09:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:09,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930824013] [2021-07-13 20:09:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930824013] [2021-07-13 20:09:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930824013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860882393] [2021-07-13 20:09:09,251 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 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 [2021-07-13 20:09:09,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:09,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:09,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860882393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:09,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965803267] [2021-07-13 20:09:09,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:09,412 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:10,709 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-07-13 20:09:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:09:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:11,183 INFO L225 Difference]: With dead ends: 96794 [2021-07-13 20:09:11,183 INFO L226 Difference]: Without dead ends: 96755 [2021-07-13 20:09:11,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:09:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-07-13 20:09:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-07-13 20:09:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-07-13 20:09:13,604 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-07-13 20:09:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:13,604 INFO L482 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-07-13 20:09:13,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-07-13 20:09:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:13,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:13,754 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:13,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 20:09:13,955 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:13,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:13,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 87 times [2021-07-13 20:09:13,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:13,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416543365] [2021-07-13 20:09:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:14,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416543365] [2021-07-13 20:09:14,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416543365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062833383] [2021-07-13 20:09:14,044 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 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 [2021-07-13 20:09:14,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:09:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:14,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062833383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:14,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:14,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:09:14,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574307865] [2021-07-13 20:09:14,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:09:14,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:09:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:09:14,221 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 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) [2021-07-13 20:09:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:15,515 INFO L93 Difference]: Finished difference Result 101984 states and 370229 transitions. [2021-07-13 20:09:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:09:15,516 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 25 [2021-07-13 20:09:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:16,096 INFO L225 Difference]: With dead ends: 101984 [2021-07-13 20:09:16,096 INFO L226 Difference]: Without dead ends: 101951 [2021-07-13 20:09:16,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:09:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101951 states. [2021-07-13 20:09:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101951 to 82749. [2021-07-13 20:09:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82749 states, 82748 states have (on average 3.6533209261855273) internal successors, (302305), 82748 states have internal predecessors, (302305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 302305 transitions. [2021-07-13 20:09:18,391 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 302305 transitions. Word has length 25 [2021-07-13 20:09:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:18,391 INFO L482 AbstractCegarLoop]: Abstraction has 82749 states and 302305 transitions. [2021-07-13 20:09:18,391 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) [2021-07-13 20:09:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 302305 transitions. [2021-07-13 20:09:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:18,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:18,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:18,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:18,729 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 88 times [2021-07-13 20:09:18,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:18,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454310426] [2021-07-13 20:09:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:18,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454310426] [2021-07-13 20:09:18,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454310426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:18,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190542958] [2021-07-13 20:09:18,822 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 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 [2021-07-13 20:09:18,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:18,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:18,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190542958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847824730] [2021-07-13 20:09:19,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:19,273 INFO L87 Difference]: Start difference. First operand 82749 states and 302305 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:20,545 INFO L93 Difference]: Finished difference Result 115207 states and 419837 transitions. [2021-07-13 20:09:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:09:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:20,988 INFO L225 Difference]: With dead ends: 115207 [2021-07-13 20:09:20,988 INFO L226 Difference]: Without dead ends: 115157 [2021-07-13 20:09:20,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:09:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115157 states. [2021-07-13 20:09:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115157 to 82759. [2021-07-13 20:09:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82759 states, 82758 states have (on average 3.653821986998236) internal successors, (302383), 82758 states have internal predecessors, (302383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82759 states to 82759 states and 302383 transitions. [2021-07-13 20:09:23,627 INFO L78 Accepts]: Start accepts. Automaton has 82759 states and 302383 transitions. Word has length 25 [2021-07-13 20:09:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:23,627 INFO L482 AbstractCegarLoop]: Abstraction has 82759 states and 302383 transitions. [2021-07-13 20:09:23,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 82759 states and 302383 transitions. [2021-07-13 20:09:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:23,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:23,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:23,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 20:09:23,966 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 89 times [2021-07-13 20:09:23,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:23,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452835997] [2021-07-13 20:09:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:24,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:24,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452835997] [2021-07-13 20:09:24,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452835997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:24,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125150688] [2021-07-13 20:09:24,038 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 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 [2021-07-13 20:09:24,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:24,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:24,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125150688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:24,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:24,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660467712] [2021-07-13 20:09:24,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:24,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:24,205 INFO L87 Difference]: Start difference. First operand 82759 states and 302383 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:25,713 INFO L93 Difference]: Finished difference Result 101895 states and 369939 transitions. [2021-07-13 20:09:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:26,093 INFO L225 Difference]: With dead ends: 101895 [2021-07-13 20:09:26,093 INFO L226 Difference]: Without dead ends: 101841 [2021-07-13 20:09:26,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101841 states. [2021-07-13 20:09:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101841 to 82803. [2021-07-13 20:09:28,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82803 states, 82802 states have (on average 3.6542112509359677) internal successors, (302576), 82802 states have internal predecessors, (302576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82803 states to 82803 states and 302576 transitions. [2021-07-13 20:09:28,359 INFO L78 Accepts]: Start accepts. Automaton has 82803 states and 302576 transitions. Word has length 25 [2021-07-13 20:09:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:28,359 INFO L482 AbstractCegarLoop]: Abstraction has 82803 states and 302576 transitions. [2021-07-13 20:09:28,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 82803 states and 302576 transitions. [2021-07-13 20:09:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:28,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:28,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:29,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-13 20:09:29,035 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash 118188467, now seen corresponding path program 90 times [2021-07-13 20:09:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:29,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226240114] [2021-07-13 20:09:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:29,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226240114] [2021-07-13 20:09:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226240114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035549448] [2021-07-13 20:09:29,125 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 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 [2021-07-13 20:09:29,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035549448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:09:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506845984] [2021-07-13 20:09:29,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:09:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:09:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:09:29,287 INFO L87 Difference]: Start difference. First operand 82803 states and 302576 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) [2021-07-13 20:09:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:30,495 INFO L93 Difference]: Finished difference Result 100879 states and 366869 transitions. [2021-07-13 20:09:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:09:30,495 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 25 [2021-07-13 20:09:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:30,875 INFO L225 Difference]: With dead ends: 100879 [2021-07-13 20:09:30,875 INFO L226 Difference]: Without dead ends: 100846 [2021-07-13 20:09:30,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:09:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100846 states. [2021-07-13 20:09:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100846 to 82884. [2021-07-13 20:09:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82884 states, 82883 states have (on average 3.6542958145820013) internal successors, (302879), 82883 states have internal predecessors, (302879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82884 states to 82884 states and 302879 transitions. [2021-07-13 20:09:33,433 INFO L78 Accepts]: Start accepts. Automaton has 82884 states and 302879 transitions. Word has length 25 [2021-07-13 20:09:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:33,433 INFO L482 AbstractCegarLoop]: Abstraction has 82884 states and 302879 transitions. [2021-07-13 20:09:33,433 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) [2021-07-13 20:09:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 82884 states and 302879 transitions. [2021-07-13 20:09:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:33,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:33,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:33,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:33,786 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:33,786 INFO L82 PathProgramCache]: Analyzing trace with hash -680851537, now seen corresponding path program 91 times [2021-07-13 20:09:33,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:33,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615836453] [2021-07-13 20:09:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:33,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615836453] [2021-07-13 20:09:33,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615836453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:33,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553735549] [2021-07-13 20:09:33,869 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 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 [2021-07-13 20:09:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553735549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:34,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:34,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642701007] [2021-07-13 20:09:34,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:34,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:34,040 INFO L87 Difference]: Start difference. First operand 82884 states and 302879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:35,653 INFO L93 Difference]: Finished difference Result 114377 states and 417122 transitions. [2021-07-13 20:09:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:36,122 INFO L225 Difference]: With dead ends: 114377 [2021-07-13 20:09:36,122 INFO L226 Difference]: Without dead ends: 114327 [2021-07-13 20:09:36,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:09:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114327 states. [2021-07-13 20:09:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114327 to 82862. [2021-07-13 20:09:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82862 states, 82861 states have (on average 3.6543609176814185) internal successors, (302804), 82861 states have internal predecessors, (302804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82862 states to 82862 states and 302804 transitions. [2021-07-13 20:09:38,975 INFO L78 Accepts]: Start accepts. Automaton has 82862 states and 302804 transitions. Word has length 25 [2021-07-13 20:09:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:38,975 INFO L482 AbstractCegarLoop]: Abstraction has 82862 states and 302804 transitions. [2021-07-13 20:09:38,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 82862 states and 302804 transitions. [2021-07-13 20:09:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:39,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:39,126 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:39,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:09:39,327 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:39,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:39,327 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-07-13 20:09:39,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:39,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458777766] [2021-07-13 20:09:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:39,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458777766] [2021-07-13 20:09:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458777766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301202346] [2021-07-13 20:09:39,404 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:09:39,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:39,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:39,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301202346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:39,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:39,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92823930] [2021-07-13 20:09:39,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:39,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:39,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:39,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:39,579 INFO L87 Difference]: Start difference. First operand 82862 states and 302804 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,859 INFO L93 Difference]: Finished difference Result 104310 states and 378454 transitions. [2021-07-13 20:09:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:40,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:41,510 INFO L225 Difference]: With dead ends: 104310 [2021-07-13 20:09:41,511 INFO L226 Difference]: Without dead ends: 104256 [2021-07-13 20:09:41,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:09:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104256 states. [2021-07-13 20:09:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104256 to 82924. [2021-07-13 20:09:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82924 states, 82923 states have (on average 3.6555599773283647) internal successors, (303130), 82923 states have internal predecessors, (303130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82924 states to 82924 states and 303130 transitions. [2021-07-13 20:09:44,100 INFO L78 Accepts]: Start accepts. Automaton has 82924 states and 303130 transitions. Word has length 25 [2021-07-13 20:09:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:44,101 INFO L482 AbstractCegarLoop]: Abstraction has 82924 states and 303130 transitions. [2021-07-13 20:09:44,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 82924 states and 303130 transitions. [2021-07-13 20:09:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:44,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:44,292 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:44,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 20:09:44,501 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:44,501 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-07-13 20:09:44,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:44,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640545751] [2021-07-13 20:09:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:44,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:44,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640545751] [2021-07-13 20:09:44,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640545751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:44,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750064619] [2021-07-13 20:09:44,582 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 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 [2021-07-13 20:09:44,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:09:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:44,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750064619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:44,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:44,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 20:09:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377246963] [2021-07-13 20:09:44,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:09:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:09:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:44,771 INFO L87 Difference]: Start difference. First operand 82924 states and 303130 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:46,457 INFO L93 Difference]: Finished difference Result 104844 states and 380478 transitions. [2021-07-13 20:09:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:09:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:46,868 INFO L225 Difference]: With dead ends: 104844 [2021-07-13 20:09:46,868 INFO L226 Difference]: Without dead ends: 104794 [2021-07-13 20:09:46,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-07-13 20:09:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82938. [2021-07-13 20:09:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82938 states, 82937 states have (on average 3.656293331082629) internal successors, (303242), 82937 states have internal predecessors, (303242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82938 states to 82938 states and 303242 transitions. [2021-07-13 20:09:49,183 INFO L78 Accepts]: Start accepts. Automaton has 82938 states and 303242 transitions. Word has length 25 [2021-07-13 20:09:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:49,184 INFO L482 AbstractCegarLoop]: Abstraction has 82938 states and 303242 transitions. [2021-07-13 20:09:49,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 82938 states and 303242 transitions. [2021-07-13 20:09:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:49,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:49,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:49,849 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-07-13 20:09:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358260845] [2021-07-13 20:09:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:49,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:49,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358260845] [2021-07-13 20:09:49,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358260845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:49,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897681736] [2021-07-13 20:09:49,908 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 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 [2021-07-13 20:09:49,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:09:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897681736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:50,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:09:50,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866564091] [2021-07-13 20:09:50,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:09:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:09:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:09:50,037 INFO L87 Difference]: Start difference. First operand 82938 states and 303242 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:50,888 INFO L93 Difference]: Finished difference Result 83638 states and 305189 transitions. [2021-07-13 20:09:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:09:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:51,179 INFO L225 Difference]: With dead ends: 83638 [2021-07-13 20:09:51,179 INFO L226 Difference]: Without dead ends: 83581 [2021-07-13 20:09:51,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:09:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83581 states. [2021-07-13 20:09:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83581 to 83002. [2021-07-13 20:09:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83002 states, 83001 states have (on average 3.6559680003855375) internal successors, (303449), 83001 states have internal predecessors, (303449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83002 states to 83002 states and 303449 transitions. [2021-07-13 20:09:53,294 INFO L78 Accepts]: Start accepts. Automaton has 83002 states and 303449 transitions. Word has length 25 [2021-07-13 20:09:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:53,294 INFO L482 AbstractCegarLoop]: Abstraction has 83002 states and 303449 transitions. [2021-07-13 20:09:53,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83002 states and 303449 transitions. [2021-07-13 20:09:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:53,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:53,426 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:53,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 20:09:53,627 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-07-13 20:09:53,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:53,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537782741] [2021-07-13 20:09:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537782741] [2021-07-13 20:09:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537782741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359965149] [2021-07-13 20:09:53,709 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 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 [2021-07-13 20:09:53,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:54,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359965149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:54,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:54,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:09:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485803812] [2021-07-13 20:09:54,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:09:54,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:09:54,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:09:54,122 INFO L87 Difference]: Start difference. First operand 83002 states and 303449 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:55,042 INFO L93 Difference]: Finished difference Result 101871 states and 370301 transitions. [2021-07-13 20:09:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:09:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:09:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:55,417 INFO L225 Difference]: With dead ends: 101871 [2021-07-13 20:09:55,417 INFO L226 Difference]: Without dead ends: 101820 [2021-07-13 20:09:55,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:09:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101820 states. [2021-07-13 20:09:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101820 to 83375. [2021-07-13 20:09:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6553122076426705) internal successors, (304758), 83374 states have internal predecessors, (304758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304758 transitions. [2021-07-13 20:09:57,652 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304758 transitions. Word has length 25 [2021-07-13 20:09:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:57,652 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304758 transitions. [2021-07-13 20:09:57,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304758 transitions. [2021-07-13 20:09:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:09:58,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:58,106 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-13 20:09:58,321 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-07-13 20:09:58,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226391388] [2021-07-13 20:09:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:58,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:58,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226391388] [2021-07-13 20:09:58,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226391388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123982543] [2021-07-13 20:09:58,418 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 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 [2021-07-13 20:09:58,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:58,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:09:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:58,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123982543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:58,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:09:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211484189] [2021-07-13 20:09:58,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:09:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:09:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:09:58,574 INFO L87 Difference]: Start difference. First operand 83375 states and 304758 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:09:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:59,619 INFO L93 Difference]: Finished difference Result 118493 states and 424280 transitions. [2021-07-13 20:09:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:09:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-13 20:09:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:00,052 INFO L225 Difference]: With dead ends: 118493 [2021-07-13 20:10:00,052 INFO L226 Difference]: Without dead ends: 118321 [2021-07-13 20:10:00,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:10:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118321 states. [2021-07-13 20:10:02,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118321 to 83375. [2021-07-13 20:10:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6537769568450598) internal successors, (304630), 83374 states have internal predecessors, (304630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304630 transitions. [2021-07-13 20:10:02,644 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304630 transitions. Word has length 25 [2021-07-13 20:10:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,644 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304630 transitions. [2021-07-13 20:10:02,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-07-13 20:10:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304630 transitions. [2021-07-13 20:10:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:02,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:02,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,993 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-07-13 20:10:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:02,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044539324] [2021-07-13 20:10:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:03,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044539324] [2021-07-13 20:10:03,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044539324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930397659] [2021-07-13 20:10:03,095 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 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 [2021-07-13 20:10:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:10:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:03,529 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-13 20:10:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930397659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:03,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:10:03,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678069234] [2021-07-13 20:10:03,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:10:03,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:10:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:10:03,598 INFO L87 Difference]: Start difference. First operand 83375 states and 304630 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:04,826 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 16 [2021-07-13 20:10:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:05,228 INFO L93 Difference]: Finished difference Result 107765 states and 385439 transitions. [2021-07-13 20:10:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:10:05,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:05,649 INFO L225 Difference]: With dead ends: 107765 [2021-07-13 20:10:05,649 INFO L226 Difference]: Without dead ends: 107423 [2021-07-13 20:10:05,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1152.4ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:10:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107423 states. [2021-07-13 20:10:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107423 to 83439. [2021-07-13 20:10:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83439 states, 83438 states have (on average 3.6545938301493326) internal successors, (304932), 83438 states have internal predecessors, (304932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83439 states to 83439 states and 304932 transitions. [2021-07-13 20:10:08,254 INFO L78 Accepts]: Start accepts. Automaton has 83439 states and 304932 transitions. Word has length 25 [2021-07-13 20:10:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:08,254 INFO L482 AbstractCegarLoop]: Abstraction has 83439 states and 304932 transitions. [2021-07-13 20:10:08,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 83439 states and 304932 transitions. [2021-07-13 20:10:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:08,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:08,404 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:08,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 20:10:08,609 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-07-13 20:10:08,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:08,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330747305] [2021-07-13 20:10:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330747305] [2021-07-13 20:10:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330747305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569344506] [2021-07-13 20:10:08,674 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:08,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:10:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569344506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:08,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:10:08,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679616670] [2021-07-13 20:10:08,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:10:08,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:10:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:10:08,810 INFO L87 Difference]: Start difference. First operand 83439 states and 304932 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:09,750 INFO L93 Difference]: Finished difference Result 85157 states and 310455 transitions. [2021-07-13 20:10:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:10:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:10,050 INFO L225 Difference]: With dead ends: 85157 [2021-07-13 20:10:10,051 INFO L226 Difference]: Without dead ends: 85092 [2021-07-13 20:10:10,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:10:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85092 states. [2021-07-13 20:10:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85092 to 84734. [2021-07-13 20:10:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84734 states, 84733 states have (on average 3.650643786954315) internal successors, (309330), 84733 states have internal predecessors, (309330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84734 states to 84734 states and 309330 transitions. [2021-07-13 20:10:12,645 INFO L78 Accepts]: Start accepts. Automaton has 84734 states and 309330 transitions. Word has length 25 [2021-07-13 20:10:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:12,645 INFO L482 AbstractCegarLoop]: Abstraction has 84734 states and 309330 transitions. [2021-07-13 20:10:12,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 84734 states and 309330 transitions. [2021-07-13 20:10:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:12,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:12,850 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:13,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-13 20:10:13,066 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:13,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-07-13 20:10:13,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:13,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139523261] [2021-07-13 20:10:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:13,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139523261] [2021-07-13 20:10:13,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139523261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753912223] [2021-07-13 20:10:13,186 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:13,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:10:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:10:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753912223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:13,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-13 20:10:13,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042680453] [2021-07-13 20:10:13,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:10:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:10:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:10:13,416 INFO L87 Difference]: Start difference. First operand 84734 states and 309330 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:14,630 INFO L93 Difference]: Finished difference Result 87116 states and 316831 transitions. [2021-07-13 20:10:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:10:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:14,977 INFO L225 Difference]: With dead ends: 87116 [2021-07-13 20:10:14,977 INFO L226 Difference]: Without dead ends: 86937 [2021-07-13 20:10:14,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:10:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86937 states. [2021-07-13 20:10:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86937 to 84105. [2021-07-13 20:10:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84105 states, 84104 states have (on average 3.6505279178160372) internal successors, (307024), 84104 states have internal predecessors, (307024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84105 states to 84105 states and 307024 transitions. [2021-07-13 20:10:17,572 INFO L78 Accepts]: Start accepts. Automaton has 84105 states and 307024 transitions. Word has length 25 [2021-07-13 20:10:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:17,572 INFO L482 AbstractCegarLoop]: Abstraction has 84105 states and 307024 transitions. [2021-07-13 20:10:17,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 84105 states and 307024 transitions. [2021-07-13 20:10:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:17,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:17,726 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:17,927 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-07-13 20:10:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:17,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529028553] [2021-07-13 20:10:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:18,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:18,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529028553] [2021-07-13 20:10:18,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529028553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132902860] [2021-07-13 20:10:18,009 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:18,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:10:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:18,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132902860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:18,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:10:18,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031929031] [2021-07-13 20:10:18,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:10:18,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:18,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:10:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:10:18,140 INFO L87 Difference]: Start difference. First operand 84105 states and 307024 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) [2021-07-13 20:10:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:19,079 INFO L93 Difference]: Finished difference Result 84705 states and 308613 transitions. [2021-07-13 20:10:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:10:19,080 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 25 [2021-07-13 20:10:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:19,378 INFO L225 Difference]: With dead ends: 84705 [2021-07-13 20:10:19,379 INFO L226 Difference]: Without dead ends: 84664 [2021-07-13 20:10:19,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:10:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-07-13 20:10:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 84321. [2021-07-13 20:10:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84321 states, 84320 states have (on average 3.6487073055028465) internal successors, (307659), 84320 states have internal predecessors, (307659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84321 states to 84321 states and 307659 transitions. [2021-07-13 20:10:21,803 INFO L78 Accepts]: Start accepts. Automaton has 84321 states and 307659 transitions. Word has length 25 [2021-07-13 20:10:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:21,803 INFO L482 AbstractCegarLoop]: Abstraction has 84321 states and 307659 transitions. [2021-07-13 20:10:21,803 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) [2021-07-13 20:10:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 84321 states and 307659 transitions. [2021-07-13 20:10:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:21,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:21,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:22,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:22,157 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-07-13 20:10:22,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:22,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267390660] [2021-07-13 20:10:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:22,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267390660] [2021-07-13 20:10:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267390660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282810698] [2021-07-13 20:10:22,241 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:22,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:10:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282810698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:22,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:22,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:10:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616899731] [2021-07-13 20:10:22,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:10:22,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:10:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:10:22,367 INFO L87 Difference]: Start difference. First operand 84321 states and 307659 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) [2021-07-13 20:10:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:23,301 INFO L93 Difference]: Finished difference Result 84472 states and 308027 transitions. [2021-07-13 20:10:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:10:23,301 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 25 [2021-07-13 20:10:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:23,627 INFO L225 Difference]: With dead ends: 84472 [2021-07-13 20:10:23,627 INFO L226 Difference]: Without dead ends: 84409 [2021-07-13 20:10:23,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:10:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84409 states. [2021-07-13 20:10:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84409 to 84320. [2021-07-13 20:10:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84320 states, 84319 states have (on average 3.6487031392687297) internal successors, (307655), 84319 states have internal predecessors, (307655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84320 states to 84320 states and 307655 transitions. [2021-07-13 20:10:25,866 INFO L78 Accepts]: Start accepts. Automaton has 84320 states and 307655 transitions. Word has length 25 [2021-07-13 20:10:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:25,866 INFO L482 AbstractCegarLoop]: Abstraction has 84320 states and 307655 transitions. [2021-07-13 20:10:25,866 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) [2021-07-13 20:10:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 84320 states and 307655 transitions. [2021-07-13 20:10:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:26,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:26,341 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:26,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,545 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:26,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:26,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-07-13 20:10:26,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:26,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21142868] [2021-07-13 20:10:26,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:26,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:26,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21142868] [2021-07-13 20:10:26,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21142868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260326174] [2021-07-13 20:10:26,638 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:10:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:26,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260326174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:26,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:10:26,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46554271] [2021-07-13 20:10:26,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:10:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:10:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:10:26,799 INFO L87 Difference]: Start difference. First operand 84320 states and 307655 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) [2021-07-13 20:10:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:27,819 INFO L93 Difference]: Finished difference Result 102467 states and 372249 transitions. [2021-07-13 20:10:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:10:27,820 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 [2021-07-13 20:10:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:28,241 INFO L225 Difference]: With dead ends: 102467 [2021-07-13 20:10:28,241 INFO L226 Difference]: Without dead ends: 102393 [2021-07-13 20:10:28,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:10:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102393 states. [2021-07-13 20:10:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102393 to 84329. [2021-07-13 20:10:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84329 states, 84328 states have (on average 3.648728773361161) internal successors, (307690), 84328 states have internal predecessors, (307690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84329 states to 84329 states and 307690 transitions. [2021-07-13 20:10:30,920 INFO L78 Accepts]: Start accepts. Automaton has 84329 states and 307690 transitions. Word has length 25 [2021-07-13 20:10:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:30,920 INFO L482 AbstractCegarLoop]: Abstraction has 84329 states and 307690 transitions. [2021-07-13 20:10:30,920 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) [2021-07-13 20:10:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84329 states and 307690 transitions. [2021-07-13 20:10:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:31,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:31,074 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:31,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:31,275 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:31,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-07-13 20:10:31,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:31,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631866647] [2021-07-13 20:10:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:31,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:31,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631866647] [2021-07-13 20:10:31,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631866647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:31,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501020756] [2021-07-13 20:10:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501020756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:31,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:31,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:10:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302912603] [2021-07-13 20:10:31,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:10:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:10:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:10:31,540 INFO L87 Difference]: Start difference. First operand 84329 states and 307690 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:32,801 INFO L93 Difference]: Finished difference Result 114923 states and 419277 transitions. [2021-07-13 20:10:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:10:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:33,568 INFO L225 Difference]: With dead ends: 114923 [2021-07-13 20:10:33,568 INFO L226 Difference]: Without dead ends: 114877 [2021-07-13 20:10:33,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:10:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114877 states. [2021-07-13 20:10:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114877 to 84322. [2021-07-13 20:10:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84322 states, 84321 states have (on average 3.6487233310800393) internal successors, (307664), 84321 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84322 states to 84322 states and 307664 transitions. [2021-07-13 20:10:36,201 INFO L78 Accepts]: Start accepts. Automaton has 84322 states and 307664 transitions. Word has length 25 [2021-07-13 20:10:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:36,201 INFO L482 AbstractCegarLoop]: Abstraction has 84322 states and 307664 transitions. [2021-07-13 20:10:36,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84322 states and 307664 transitions. [2021-07-13 20:10:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:36,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:36,674 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:36,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 20:10:36,874 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-07-13 20:10:36,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:36,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538855427] [2021-07-13 20:10:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:36,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538855427] [2021-07-13 20:10:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538855427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261791601] [2021-07-13 20:10:36,974 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:36,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:36,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:36,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:37,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261791601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:37,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:37,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:10:37,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574094516] [2021-07-13 20:10:37,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:10:37,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:37,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:10:37,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:10:37,097 INFO L87 Difference]: Start difference. First operand 84322 states and 307664 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) [2021-07-13 20:10:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:38,026 INFO L93 Difference]: Finished difference Result 84652 states and 308467 transitions. [2021-07-13 20:10:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:10:38,026 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 25 [2021-07-13 20:10:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:38,408 INFO L225 Difference]: With dead ends: 84652 [2021-07-13 20:10:38,408 INFO L226 Difference]: Without dead ends: 84561 [2021-07-13 20:10:38,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:10:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-07-13 20:10:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84306. [2021-07-13 20:10:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84306 states, 84305 states have (on average 3.647316292034873) internal successors, (307487), 84305 states have internal predecessors, (307487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 307487 transitions. [2021-07-13 20:10:40,706 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 307487 transitions. Word has length 25 [2021-07-13 20:10:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:40,706 INFO L482 AbstractCegarLoop]: Abstraction has 84306 states and 307487 transitions. [2021-07-13 20:10:40,706 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) [2021-07-13 20:10:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 307487 transitions. [2021-07-13 20:10:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:40,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:40,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:41,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:41,050 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 105 times [2021-07-13 20:10:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:41,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878124632] [2021-07-13 20:10:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:41,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878124632] [2021-07-13 20:10:41,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878124632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703147633] [2021-07-13 20:10:41,511 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:41,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:10:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703147633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:41,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:41,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:10:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256380728] [2021-07-13 20:10:41,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:10:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:10:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:10:41,637 INFO L87 Difference]: Start difference. First operand 84306 states and 307487 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:42,609 INFO L93 Difference]: Finished difference Result 103449 states and 375574 transitions. [2021-07-13 20:10:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:10:42,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:43,066 INFO L225 Difference]: With dead ends: 103449 [2021-07-13 20:10:43,066 INFO L226 Difference]: Without dead ends: 103317 [2021-07-13 20:10:43,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:10:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103317 states. [2021-07-13 20:10:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103317 to 85017. [2021-07-13 20:10:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85017 states, 85016 states have (on average 3.644808036134375) internal successors, (309867), 85016 states have internal predecessors, (309867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85017 states to 85017 states and 309867 transitions. [2021-07-13 20:10:45,726 INFO L78 Accepts]: Start accepts. Automaton has 85017 states and 309867 transitions. Word has length 25 [2021-07-13 20:10:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:45,726 INFO L482 AbstractCegarLoop]: Abstraction has 85017 states and 309867 transitions. [2021-07-13 20:10:45,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 85017 states and 309867 transitions. [2021-07-13 20:10:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:45,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:45,879 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:46,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:46,079 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 106 times [2021-07-13 20:10:46,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:46,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848260165] [2021-07-13 20:10:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:46,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848260165] [2021-07-13 20:10:46,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848260165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255254814] [2021-07-13 20:10:46,173 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:46,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:46,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:46,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:46,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255254814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:46,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:46,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:10:46,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231432148] [2021-07-13 20:10:46,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:10:46,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:10:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:10:46,313 INFO L87 Difference]: Start difference. First operand 85017 states and 309867 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:47,753 INFO L93 Difference]: Finished difference Result 116231 states and 423805 transitions. [2021-07-13 20:10:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:10:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:10:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:48,260 INFO L225 Difference]: With dead ends: 116231 [2021-07-13 20:10:48,261 INFO L226 Difference]: Without dead ends: 116185 [2021-07-13 20:10:48,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:10:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116185 states. [2021-07-13 20:10:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116185 to 85004. [2021-07-13 20:10:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85004 states, 85003 states have (on average 3.644706657412091) internal successors, (309811), 85003 states have internal predecessors, (309811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85004 states to 85004 states and 309811 transitions. [2021-07-13 20:10:51,140 INFO L78 Accepts]: Start accepts. Automaton has 85004 states and 309811 transitions. Word has length 25 [2021-07-13 20:10:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:51,140 INFO L482 AbstractCegarLoop]: Abstraction has 85004 states and 309811 transitions. [2021-07-13 20:10:51,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 85004 states and 309811 transitions. [2021-07-13 20:10:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:51,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:51,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:51,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-07-13 20:10:51,495 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 107 times [2021-07-13 20:10:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:51,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648124453] [2021-07-13 20:10:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:51,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648124453] [2021-07-13 20:10:51,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648124453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:51,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317354217] [2021-07-13 20:10:51,578 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:51,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:10:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:51,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317354217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:51,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:51,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:10:51,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176387028] [2021-07-13 20:10:51,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:10:51,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:51,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:10:51,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:10:51,678 INFO L87 Difference]: Start difference. First operand 85004 states and 309811 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) [2021-07-13 20:10:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:52,543 INFO L93 Difference]: Finished difference Result 85225 states and 310318 transitions. [2021-07-13 20:10:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:10:52,544 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 25 [2021-07-13 20:10:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:52,881 INFO L225 Difference]: With dead ends: 85225 [2021-07-13 20:10:52,881 INFO L226 Difference]: Without dead ends: 85188 [2021-07-13 20:10:52,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:10:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85188 states. [2021-07-13 20:10:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85188 to 84839. [2021-07-13 20:10:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84839 states, 84838 states have (on average 3.645795516160211) internal successors, (309302), 84838 states have internal predecessors, (309302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84839 states to 84839 states and 309302 transitions. [2021-07-13 20:10:55,408 INFO L78 Accepts]: Start accepts. Automaton has 84839 states and 309302 transitions. Word has length 25 [2021-07-13 20:10:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:55,408 INFO L482 AbstractCegarLoop]: Abstraction has 84839 states and 309302 transitions. [2021-07-13 20:10:55,408 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) [2021-07-13 20:10:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 84839 states and 309302 transitions. [2021-07-13 20:10:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:55,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:55,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:55,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:55,769 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 108 times [2021-07-13 20:10:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392128726] [2021-07-13 20:10:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:55,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:55,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392128726] [2021-07-13 20:10:55,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392128726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:55,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180592385] [2021-07-13 20:10:55,852 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:55,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:10:55,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:55,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:10:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180592385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:55,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:55,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:10:55,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011062670] [2021-07-13 20:10:55,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:10:55,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:10:55,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:10:55,948 INFO L87 Difference]: Start difference. First operand 84839 states and 309302 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) [2021-07-13 20:10:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:56,793 INFO L93 Difference]: Finished difference Result 84942 states and 309502 transitions. [2021-07-13 20:10:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:10:56,793 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 25 [2021-07-13 20:10:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:57,116 INFO L225 Difference]: With dead ends: 84942 [2021-07-13 20:10:57,116 INFO L226 Difference]: Without dead ends: 84847 [2021-07-13 20:10:57,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:10:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84847 states. [2021-07-13 20:10:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84847 to 84780. [2021-07-13 20:10:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84780 states, 84779 states have (on average 3.643850481841022) internal successors, (308922), 84779 states have internal predecessors, (308922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84780 states to 84780 states and 308922 transitions. [2021-07-13 20:10:59,413 INFO L78 Accepts]: Start accepts. Automaton has 84780 states and 308922 transitions. Word has length 25 [2021-07-13 20:10:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:59,413 INFO L482 AbstractCegarLoop]: Abstraction has 84780 states and 308922 transitions. [2021-07-13 20:10:59,413 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) [2021-07-13 20:10:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 84780 states and 308922 transitions. [2021-07-13 20:10:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:10:59,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:59,925 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:00,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:00,126 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 109 times [2021-07-13 20:11:00,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:00,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788365932] [2021-07-13 20:11:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:00,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:00,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788365932] [2021-07-13 20:11:00,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788365932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:00,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614360681] [2021-07-13 20:11:00,196 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:00,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:11:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614360681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:00,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:11:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757078515] [2021-07-13 20:11:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:11:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:11:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:11:00,377 INFO L87 Difference]: Start difference. First operand 84780 states and 308922 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:01,497 INFO L93 Difference]: Finished difference Result 98741 states and 357653 transitions. [2021-07-13 20:11:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:11:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:11:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:01,890 INFO L225 Difference]: With dead ends: 98741 [2021-07-13 20:11:01,891 INFO L226 Difference]: Without dead ends: 98669 [2021-07-13 20:11:01,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:11:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98669 states. [2021-07-13 20:11:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98669 to 86019. [2021-07-13 20:11:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86019 states, 86018 states have (on average 3.643783859192262) internal successors, (313431), 86018 states have internal predecessors, (313431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86019 states to 86019 states and 313431 transitions. [2021-07-13 20:11:04,626 INFO L78 Accepts]: Start accepts. Automaton has 86019 states and 313431 transitions. Word has length 25 [2021-07-13 20:11:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:04,626 INFO L482 AbstractCegarLoop]: Abstraction has 86019 states and 313431 transitions. [2021-07-13 20:11:04,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 86019 states and 313431 transitions. [2021-07-13 20:11:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:11:04,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:04,784 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:04,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:04,984 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 110 times [2021-07-13 20:11:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:04,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162271831] [2021-07-13 20:11:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:05,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:05,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162271831] [2021-07-13 20:11:05,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162271831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:05,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663444086] [2021-07-13 20:11:05,046 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:05,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:05,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:11:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663444086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:05,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:11:05,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999017814] [2021-07-13 20:11:05,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:11:05,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:11:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:11:05,162 INFO L87 Difference]: Start difference. First operand 86019 states and 313431 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:11:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:05,996 INFO L93 Difference]: Finished difference Result 86639 states and 315121 transitions. [2021-07-13 20:11:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:11:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-07-13 20:11:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:06,295 INFO L225 Difference]: With dead ends: 86639 [2021-07-13 20:11:06,295 INFO L226 Difference]: Without dead ends: 86578 [2021-07-13 20:11:06,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:11:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86578 states. [2021-07-13 20:11:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86578 to 86023. [2021-07-13 20:11:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6426960544976867) internal successors, (313352), 86022 states have internal predecessors, (313352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313352 transitions. [2021-07-13 20:11:08,666 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313352 transitions. Word has length 25 [2021-07-13 20:11:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:08,666 INFO L482 AbstractCegarLoop]: Abstraction has 86023 states and 313352 transitions. [2021-07-13 20:11:08,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-07-13 20:11:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313352 transitions. [2021-07-13 20:11:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:11:08,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:08,819 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:09,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 20:11:09,019 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-07-13 20:11:09,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:09,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842817753] [2021-07-13 20:11:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842817753] [2021-07-13 20:11:09,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842817753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070405973] [2021-07-13 20:11:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:11:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070405973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:09,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:11:09,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526100341] [2021-07-13 20:11:09,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:11:09,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:11:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:11:09,130 INFO L87 Difference]: Start difference. First operand 86023 states and 313352 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:10,793 INFO L93 Difference]: Finished difference Result 182520 states and 664068 transitions. [2021-07-13 20:11:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:11:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:11:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:11,539 INFO L225 Difference]: With dead ends: 182520 [2021-07-13 20:11:11,540 INFO L226 Difference]: Without dead ends: 182506 [2021-07-13 20:11:11,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:11:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182506 states. [2021-07-13 20:11:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182506 to 178615. [2021-07-13 20:11:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178615 states, 178614 states have (on average 3.650077821447367) internal successors, (651955), 178614 states have internal predecessors, (651955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178615 states to 178615 states and 651955 transitions. [2021-07-13 20:11:17,037 INFO L78 Accepts]: Start accepts. Automaton has 178615 states and 651955 transitions. Word has length 25 [2021-07-13 20:11:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:17,037 INFO L482 AbstractCegarLoop]: Abstraction has 178615 states and 651955 transitions. [2021-07-13 20:11:17,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 178615 states and 651955 transitions. [2021-07-13 20:11:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:11:17,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:17,280 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:17,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 20:11:17,480 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-07-13 20:11:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:17,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216921673] [2021-07-13 20:11:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:17,846 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 20:11:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216921673] [2021-07-13 20:11:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216921673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710146954] [2021-07-13 20:11:17,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:17,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:11:17,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710146954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:17,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:11:17,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235166927] [2021-07-13 20:11:17,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:11:17,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:11:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:11:17,940 INFO L87 Difference]: Start difference. First operand 178615 states and 651955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:20,324 INFO L93 Difference]: Finished difference Result 310258 states and 1130711 transitions. [2021-07-13 20:11:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:11:20,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:11:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:22,182 INFO L225 Difference]: With dead ends: 310258 [2021-07-13 20:11:22,182 INFO L226 Difference]: Without dead ends: 310258 [2021-07-13 20:11:22,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:11:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-07-13 20:11:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 307681. [2021-07-13 20:11:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307681 states, 307680 states have (on average 3.6506727769110765) internal successors, (1123239), 307680 states have internal predecessors, (1123239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307681 states to 307681 states and 1123239 transitions. [2021-07-13 20:11:32,750 INFO L78 Accepts]: Start accepts. Automaton has 307681 states and 1123239 transitions. Word has length 25 [2021-07-13 20:11:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:32,750 INFO L482 AbstractCegarLoop]: Abstraction has 307681 states and 1123239 transitions. [2021-07-13 20:11:32,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 307681 states and 1123239 transitions. [2021-07-13 20:11:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:11:33,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:33,137 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:33,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-13 20:11:33,341 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-07-13 20:11:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:33,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241174016] [2021-07-13 20:11:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:33,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:33,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241174016] [2021-07-13 20:11:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241174016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:33,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709095264] [2021-07-13 20:11:33,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:11:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:11:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:33,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709095264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:33,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:33,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:11:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997585798] [2021-07-13 20:11:33,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:11:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:33,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:11:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:11:33,450 INFO L87 Difference]: Start difference. First operand 307681 states and 1123239 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:36,285 INFO L93 Difference]: Finished difference Result 315768 states and 1151589 transitions. [2021-07-13 20:11:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:11:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:11:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:38,226 INFO L225 Difference]: With dead ends: 315768 [2021-07-13 20:11:38,226 INFO L226 Difference]: Without dead ends: 315768 [2021-07-13 20:11:38,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:11:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315768 states. [2021-07-13 20:11:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315768 to 307781. [2021-07-13 20:11:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307781 states, 307780 states have (on average 3.6506400675807393) internal successors, (1123594), 307780 states have internal predecessors, (1123594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307781 states to 307781 states and 1123594 transitions. [2021-07-13 20:11:50,701 INFO L78 Accepts]: Start accepts. Automaton has 307781 states and 1123594 transitions. Word has length 25 [2021-07-13 20:11:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:50,701 INFO L482 AbstractCegarLoop]: Abstraction has 307781 states and 1123594 transitions. [2021-07-13 20:11:50,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 307781 states and 1123594 transitions. [2021-07-13 20:11:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:11:51,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:51,086 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:51,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:51,286 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1675135705, now seen corresponding path program 28 times [2021-07-13 20:11:51,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:51,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468836697] [2021-07-13 20:11:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:51,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468836697] [2021-07-13 20:11:51,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468836697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663735513] [2021-07-13 20:11:51,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:51,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:11:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:51,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663735513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:51,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:51,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:11:51,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643855711] [2021-07-13 20:11:51,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:11:51,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:11:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:11:51,403 INFO L87 Difference]: Start difference. First operand 307781 states and 1123594 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:55,129 INFO L93 Difference]: Finished difference Result 404675 states and 1471493 transitions. [2021-07-13 20:11:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:11:55,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:11:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:57,488 INFO L225 Difference]: With dead ends: 404675 [2021-07-13 20:11:57,489 INFO L226 Difference]: Without dead ends: 404675 [2021-07-13 20:11:57,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:11:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404675 states. [2021-07-13 20:12:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404675 to 328058. [2021-07-13 20:12:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328058 states, 328057 states have (on average 3.6505454844737346) internal successors, (1197587), 328057 states have internal predecessors, (1197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328058 states to 328058 states and 1197587 transitions. [2021-07-13 20:12:11,911 INFO L78 Accepts]: Start accepts. Automaton has 328058 states and 1197587 transitions. Word has length 25 [2021-07-13 20:12:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:11,911 INFO L482 AbstractCegarLoop]: Abstraction has 328058 states and 1197587 transitions. [2021-07-13 20:12:11,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 328058 states and 1197587 transitions. [2021-07-13 20:12:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:12:12,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:12,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-13 20:12:13,033 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 910634069, now seen corresponding path program 29 times [2021-07-13 20:12:13,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:13,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430297010] [2021-07-13 20:12:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430297010] [2021-07-13 20:12:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430297010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267011403] [2021-07-13 20:12:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:13,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:12:13,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:13,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:12:13,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:13,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267011403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:13,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:13,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:12:13,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82647901] [2021-07-13 20:12:13,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:12:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:12:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:12:13,153 INFO L87 Difference]: Start difference. First operand 328058 states and 1197587 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:12:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:19,089 INFO L93 Difference]: Finished difference Result 638146 states and 2324169 transitions. [2021-07-13 20:12:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:12:19,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 25 [2021-07-13 20:12:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:25,697 INFO L225 Difference]: With dead ends: 638146 [2021-07-13 20:12:25,697 INFO L226 Difference]: Without dead ends: 638146 [2021-07-13 20:12:25,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:12:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638146 states. [2021-07-13 20:12:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638146 to 633057. [2021-07-13 20:12:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633057 states, 633056 states have (on average 3.6415419804882982) internal successors, (2305300), 633056 states have internal predecessors, (2305300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633057 states to 633057 states and 2305300 transitions. [2021-07-13 20:12:53,383 INFO L78 Accepts]: Start accepts. Automaton has 633057 states and 2305300 transitions. Word has length 25 [2021-07-13 20:12:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 633057 states and 2305300 transitions. [2021-07-13 20:12:53,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-13 20:12:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 633057 states and 2305300 transitions.