/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:05:07,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:05:07,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:05:07,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:05:07,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:05:07,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:05:07,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:05:07,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:05:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:05:07,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:05:07,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:05:07,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:05:07,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:05:07,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:05:07,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:05:07,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:05:07,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 18:05:07,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:05:07,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:05:07,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:05:07,289 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 [2021-07-09 18:05:07,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:05:07,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:05:07,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:05:07,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:05:07,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:05:07,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:05:07,320 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:05:07,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:05:07,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:05:07,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:05:07,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:05:07,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:05:07,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:05:07,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:05:07,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:05:07,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:05:07,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:05:07,324 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:05:07,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:05:07,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:05:07,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:05:07,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:05:07,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:05:07,604 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:05:07,613 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:05:07,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-07-09 18:05:07,614 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-07-09 18:05:07,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:05:07,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:05:07,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:05:07,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:05:07,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:05:07,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:05:07,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:05:07,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:05:07,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:05:07,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/1) ... [2021-07-09 18:05:07,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:05:07,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:05:07,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:05:07,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:05:07,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (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 [2021-07-09 18:05:07,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:05:07,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:05:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:05:07,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:05:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:05:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:05:07,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:05:07,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:05:07,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:05:07,765 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:05:08,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:05:08,006 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:05:08,007 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:05:08 BoogieIcfgContainer [2021-07-09 18:05:08,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:05:08,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:05:08,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:05:08,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:05:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:05:07" (1/2) ... [2021-07-09 18:05:08,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117e748b and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:05:08, skipping insertion in model container [2021-07-09 18:05:08,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:05:08" (2/2) ... [2021-07-09 18:05:08,012 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-07-09 18:05:08,016 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:05:08,032 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:05:08,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:05:08,033 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:05:08,070 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:05:08,084 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:05:08,097 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:05:08,098 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:05:08,098 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:05:08,098 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:05:08,098 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:05:08,098 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:05:08,098 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:05:08,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:05:08,104 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-07-09 18:05:08,115 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:05:08,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:08,122 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:08,122 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1805809892, now seen corresponding path program 1 times [2021-07-09 18:05:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:08,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191215250] [2021-07-09 18:05:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:08,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:08,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191215250] [2021-07-09 18:05:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191215250] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:05:08,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:05:08,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:05:08,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122395626] [2021-07-09 18:05:08,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:05:08,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:08,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:05:08,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:05:08,233 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 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), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:08,252 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-07-09 18:05:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:05:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:05:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:08,259 INFO L225 Difference]: With dead ends: 84 [2021-07-09 18:05:08,259 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 18:05:08,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:05:08,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 18:05:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-07-09 18:05:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-07-09 18:05:08,292 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-07-09 18:05:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:08,293 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-07-09 18:05:08,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,293 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-07-09 18:05:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:05:08,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:08,294 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:08,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:05:08,294 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1644964665, now seen corresponding path program 1 times [2021-07-09 18:05:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:08,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093386413] [2021-07-09 18:05:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:08,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:08,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093386413] [2021-07-09 18:05:08,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093386413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:08,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773403609] [2021-07-09 18:05:08,419 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 [2021-07-09 18:05:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:08,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:05:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773403609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:08,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:08,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:05:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272445775] [2021-07-09 18:05:08,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:05:08,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:08,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:05:08,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:05:08,597 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-07-09 18:05:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:08,856 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2021-07-09 18:05:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:05:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 [2021-07-09 18:05:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:08,858 INFO L225 Difference]: With dead ends: 197 [2021-07-09 18:05:08,859 INFO L226 Difference]: Without dead ends: 188 [2021-07-09 18:05:08,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:05:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-09 18:05:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2021-07-09 18:05:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2021-07-09 18:05:08,868 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2021-07-09 18:05:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:08,868 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2021-07-09 18:05:08,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-07-09 18:05:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2021-07-09 18:05:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:05:08,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:08,869 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:09,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:05:09,077 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash 424057207, now seen corresponding path program 2 times [2021-07-09 18:05:09,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:09,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314248007] [2021-07-09 18:05:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:09,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314248007] [2021-07-09 18:05:09,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314248007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:09,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121435637] [2021-07-09 18:05:09,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:09,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:05:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:09,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121435637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:09,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:09,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:05:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764195082] [2021-07-09 18:05:09,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:05:09,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:05:09,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:05:09,405 INFO L87 Difference]: Start difference. First operand 113 states and 216 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) [2021-07-09 18:05:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:09,613 INFO L93 Difference]: Finished difference Result 233 states and 445 transitions. [2021-07-09 18:05:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:05:09,613 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 19 [2021-07-09 18:05:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:09,616 INFO L225 Difference]: With dead ends: 233 [2021-07-09 18:05:09,616 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 18:05:09,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:05:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 18:05:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 117. [2021-07-09 18:05:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2021-07-09 18:05:09,636 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2021-07-09 18:05:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:09,636 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2021-07-09 18:05:09,636 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) [2021-07-09 18:05:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2021-07-09 18:05:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:05:09,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:09,640 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:09,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:09,847 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:09,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:09,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1293234039, now seen corresponding path program 3 times [2021-07-09 18:05:09,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:09,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169035388] [2021-07-09 18:05:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:09,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:09,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169035388] [2021-07-09 18:05:09,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169035388] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:05:09,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:05:09,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:05:09,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689540582] [2021-07-09 18:05:09,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:05:09,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:09,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:05:09,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:05:09,867 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-07-09 18:05:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:09,871 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2021-07-09 18:05:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:05:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 [2021-07-09 18:05:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:09,872 INFO L225 Difference]: With dead ends: 120 [2021-07-09 18:05:09,872 INFO L226 Difference]: Without dead ends: 120 [2021-07-09 18:05:09,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:05:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-09 18:05:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-07-09 18:05:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2021-07-09 18:05:09,876 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2021-07-09 18:05:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:09,876 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2021-07-09 18:05:09,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2021-07-09 18:05:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2021-07-09 18:05:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:05:09,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:09,876 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:09,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:05:09,877 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:09,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1628191443, now seen corresponding path program 4 times [2021-07-09 18:05:09,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:09,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228916440] [2021-07-09 18:05:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:09,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228916440] [2021-07-09 18:05:09,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228916440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:09,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299335926] [2021-07-09 18:05:09,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:05:09,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:09,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:09,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:05:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299335926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:10,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:05:10,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121221954] [2021-07-09 18:05:10,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:05:10,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:05:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:05:10,109 INFO L87 Difference]: Start difference. First operand 120 states and 230 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) [2021-07-09 18:05:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:10,259 INFO L93 Difference]: Finished difference Result 175 states and 327 transitions. [2021-07-09 18:05:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:05:10,259 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 19 [2021-07-09 18:05:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:10,260 INFO L225 Difference]: With dead ends: 175 [2021-07-09 18:05:10,260 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 18:05:10,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:05:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 18:05:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 114. [2021-07-09 18:05:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2021-07-09 18:05:10,263 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2021-07-09 18:05:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:10,263 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2021-07-09 18:05:10,263 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) [2021-07-09 18:05:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2021-07-09 18:05:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:05:10,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:10,264 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:10,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:10,483 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1114878874, now seen corresponding path program 1 times [2021-07-09 18:05:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794452281] [2021-07-09 18:05:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794452281] [2021-07-09 18:05:10,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794452281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406072736] [2021-07-09 18:05:10,521 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 [2021-07-09 18:05:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:10,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:05:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:10,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:10,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:10,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:10,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:05:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406072736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:10,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:05:10,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781566372] [2021-07-09 18:05:10,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:05:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:05:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:05:10,623 INFO L87 Difference]: Start difference. First operand 114 states and 217 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) [2021-07-09 18:05:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:10,669 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2021-07-09 18:05:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:05:10,670 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 22 [2021-07-09 18:05:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:10,671 INFO L225 Difference]: With dead ends: 152 [2021-07-09 18:05:10,671 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 18:05:10,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:05:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 18:05:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2021-07-09 18:05:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2021-07-09 18:05:10,676 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2021-07-09 18:05:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2021-07-09 18:05:10,676 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) [2021-07-09 18:05:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2021-07-09 18:05:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:05:10,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:10,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:10,881 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1319012138, now seen corresponding path program 5 times [2021-07-09 18:05:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106692292] [2021-07-09 18:05:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106692292] [2021-07-09 18:05:10,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106692292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807172260] [2021-07-09 18:05:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:10,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:05:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807172260] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:05:10,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:05:10,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-07-09 18:05:10,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420675505] [2021-07-09 18:05:10,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:05:10,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:10,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:05:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:05:10,998 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-07-09 18:05:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:11,008 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2021-07-09 18:05:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:05:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2021-07-09 18:05:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:11,010 INFO L225 Difference]: With dead ends: 288 [2021-07-09 18:05:11,010 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 18:05:11,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:05:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 18:05:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2021-07-09 18:05:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2021-07-09 18:05:11,015 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2021-07-09 18:05:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:11,015 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2021-07-09 18:05:11,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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) [2021-07-09 18:05:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2021-07-09 18:05:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:11,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:11,015 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, 1] [2021-07-09 18:05:11,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 18:05:11,217 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 543374211, now seen corresponding path program 2 times [2021-07-09 18:05:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:11,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619816112] [2021-07-09 18:05:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:11,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619816112] [2021-07-09 18:05:11,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619816112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397204865] [2021-07-09 18:05:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:11,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:11,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:11,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:11,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:11,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:11,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:11,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:11,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397204865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:11,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:11,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 18:05:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171643791] [2021-07-09 18:05:11,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:05:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:05:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:05:11,553 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-07-09 18:05:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:11,952 INFO L93 Difference]: Finished difference Result 313 states and 606 transitions. [2021-07-09 18:05:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:05:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 26 [2021-07-09 18:05:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:11,955 INFO L225 Difference]: With dead ends: 313 [2021-07-09 18:05:11,955 INFO L226 Difference]: Without dead ends: 281 [2021-07-09 18:05:11,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:05:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-09 18:05:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 246. [2021-07-09 18:05:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2021-07-09 18:05:11,961 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2021-07-09 18:05:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:11,961 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2021-07-09 18:05:11,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-07-09 18:05:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2021-07-09 18:05:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:11,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:11,963 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, 1] [2021-07-09 18:05:12,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:12,169 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1138730303, now seen corresponding path program 3 times [2021-07-09 18:05:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:12,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884097098] [2021-07-09 18:05:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:12,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:12,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884097098] [2021-07-09 18:05:12,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884097098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:12,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609366605] [2021-07-09 18:05:12,309 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 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 [2021-07-09 18:05:12,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:05:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:12,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:12,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:12,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:12,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:12,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609366605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:12,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:12,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:05:12,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806787357] [2021-07-09 18:05:12,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:05:12,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:05:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:05:12,562 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:13,097 INFO L93 Difference]: Finished difference Result 346 states and 668 transitions. [2021-07-09 18:05:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:13,098 INFO L225 Difference]: With dead ends: 346 [2021-07-09 18:05:13,098 INFO L226 Difference]: Without dead ends: 314 [2021-07-09 18:05:13,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-09 18:05:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 252. [2021-07-09 18:05:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2021-07-09 18:05:13,105 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2021-07-09 18:05:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:13,105 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2021-07-09 18:05:13,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2021-07-09 18:05:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:13,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:13,107 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, 1] [2021-07-09 18:05:13,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:13,323 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1169241475, now seen corresponding path program 4 times [2021-07-09 18:05:13,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:13,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637571874] [2021-07-09 18:05:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:13,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:13,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637571874] [2021-07-09 18:05:13,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637571874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:13,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012457248] [2021-07-09 18:05:13,511 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 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 [2021-07-09 18:05:13,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:13,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:13,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:13,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:13,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:13,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012457248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:05:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395254093] [2021-07-09 18:05:13,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:05:13,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:05:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:05:13,766 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:14,354 INFO L93 Difference]: Finished difference Result 365 states and 705 transitions. [2021-07-09 18:05:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:14,355 INFO L225 Difference]: With dead ends: 365 [2021-07-09 18:05:14,355 INFO L226 Difference]: Without dead ends: 333 [2021-07-09 18:05:14,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-09 18:05:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 253. [2021-07-09 18:05:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2021-07-09 18:05:14,361 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2021-07-09 18:05:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:14,361 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2021-07-09 18:05:14,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2021-07-09 18:05:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:14,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:14,361 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, 1] [2021-07-09 18:05:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:05:14,577 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483455, now seen corresponding path program 5 times [2021-07-09 18:05:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:14,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338763628] [2021-07-09 18:05:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:14,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338763628] [2021-07-09 18:05:14,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338763628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278952046] [2021-07-09 18:05:14,717 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 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 [2021-07-09 18:05:14,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:14,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:14,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:05:14,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:14,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:14,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:14,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-09 18:05:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:14,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278952046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:14,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:14,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:05:14,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044134511] [2021-07-09 18:05:14,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:05:14,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:14,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:05:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:05:14,958 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:15,655 INFO L93 Difference]: Finished difference Result 405 states and 784 transitions. [2021-07-09 18:05:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:05:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:15,657 INFO L225 Difference]: With dead ends: 405 [2021-07-09 18:05:15,657 INFO L226 Difference]: Without dead ends: 373 [2021-07-09 18:05:15,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:05:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-09 18:05:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 257. [2021-07-09 18:05:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-07-09 18:05:15,663 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-07-09 18:05:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:15,663 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-07-09 18:05:15,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-07-09 18:05:15,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:15,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:15,664 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, 1] [2021-07-09 18:05:15,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:15,878 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1848637673, now seen corresponding path program 6 times [2021-07-09 18:05:15,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:15,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906405516] [2021-07-09 18:05:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:16,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906405516] [2021-07-09 18:05:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906405516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:16,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544566070] [2021-07-09 18:05:16,039 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 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 [2021-07-09 18:05:16,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:05:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:05:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:05:16,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:16,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:16,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:16,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-09 18:05:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544566070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:16,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180721797] [2021-07-09 18:05:16,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:16,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:16,308 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:16,824 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-07-09 18:05:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:05:16,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:16,826 INFO L225 Difference]: With dead ends: 321 [2021-07-09 18:05:16,826 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 18:05:16,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 18:05:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-07-09 18:05:16,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-07-09 18:05:16,836 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-07-09 18:05:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:16,836 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-07-09 18:05:16,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-07-09 18:05:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:16,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:16,836 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, 1] [2021-07-09 18:05:17,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:17,041 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:17,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2081701755, now seen corresponding path program 7 times [2021-07-09 18:05:17,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:17,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576973893] [2021-07-09 18:05:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:17,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:17,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576973893] [2021-07-09 18:05:17,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576973893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:17,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239112522] [2021-07-09 18:05:17,167 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 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 [2021-07-09 18:05:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:17,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:05:17,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:17,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:17,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:17,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-09 18:05:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:17,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239112522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:17,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:17,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429707511] [2021-07-09 18:05:17,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:17,418 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:17,896 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-07-09 18:05:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:05:17,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:17,897 INFO L225 Difference]: With dead ends: 349 [2021-07-09 18:05:17,897 INFO L226 Difference]: Without dead ends: 317 [2021-07-09 18:05:17,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-09 18:05:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-07-09 18:05:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-07-09 18:05:17,903 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-07-09 18:05:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:17,903 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-07-09 18:05:17,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-07-09 18:05:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:17,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:17,903 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, 1] [2021-07-09 18:05:18,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:05:18,104 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 226270023, now seen corresponding path program 8 times [2021-07-09 18:05:18,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:18,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479332205] [2021-07-09 18:05:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:18,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479332205] [2021-07-09 18:05:18,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479332205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509555837] [2021-07-09 18:05:18,260 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 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 [2021-07-09 18:05:18,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:18,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:18,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:18,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:18,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:18,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:18,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:18,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509555837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:18,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:18,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:18,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081686205] [2021-07-09 18:05:18,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:18,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:18,490 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:18,952 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-07-09 18:05:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:05:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:18,953 INFO L225 Difference]: With dead ends: 386 [2021-07-09 18:05:18,953 INFO L226 Difference]: Without dead ends: 354 [2021-07-09 18:05:18,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:18,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-09 18:05:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-07-09 18:05:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-07-09 18:05:18,961 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-07-09 18:05:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:18,961 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-07-09 18:05:18,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-07-09 18:05:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:18,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:18,962 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, 1] [2021-07-09 18:05:19,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:05:19,173 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1652512389, now seen corresponding path program 9 times [2021-07-09 18:05:19,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:19,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846532605] [2021-07-09 18:05:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:19,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846532605] [2021-07-09 18:05:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846532605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425975188] [2021-07-09 18:05:19,303 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 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 [2021-07-09 18:05:19,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:05:19,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:05:19,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:19,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:19,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:19,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-09 18:05:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425975188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:19,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:19,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:19,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395857737] [2021-07-09 18:05:19,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:19,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:19,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:19,547 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:20,238 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-07-09 18:05:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:05:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:20,240 INFO L225 Difference]: With dead ends: 429 [2021-07-09 18:05:20,240 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 18:05:20,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 18:05:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-07-09 18:05:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-07-09 18:05:20,258 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-07-09 18:05:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:20,258 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-07-09 18:05:20,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-07-09 18:05:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:20,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:20,259 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, 1] [2021-07-09 18:05:20,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:05:20,469 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 632062879, now seen corresponding path program 10 times [2021-07-09 18:05:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:20,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019607264] [2021-07-09 18:05:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:20,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019607264] [2021-07-09 18:05:20,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019607264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:20,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478408455] [2021-07-09 18:05:20,595 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 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 [2021-07-09 18:05:20,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:20,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:20,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:20,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:20,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:20,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478408455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:20,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:20,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903611458] [2021-07-09 18:05:20,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:20,847 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:21,276 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-07-09 18:05:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:05:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:21,277 INFO L225 Difference]: With dead ends: 331 [2021-07-09 18:05:21,277 INFO L226 Difference]: Without dead ends: 303 [2021-07-09 18:05:21,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-09 18:05:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-07-09 18:05:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-07-09 18:05:21,283 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-07-09 18:05:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:21,283 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-07-09 18:05:21,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-07-09 18:05:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:21,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:21,284 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, 1] [2021-07-09 18:05:21,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:21,500 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1575102459, now seen corresponding path program 11 times [2021-07-09 18:05:21,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:21,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510768270] [2021-07-09 18:05:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:21,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510768270] [2021-07-09 18:05:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510768270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138021230] [2021-07-09 18:05:21,638 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 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 [2021-07-09 18:05:21,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:21,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:21,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:21,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:21,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:21,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:21,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:21,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:21,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138021230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:21,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:21,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:05:21,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152031683] [2021-07-09 18:05:21,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:05:21,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:05:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:05:21,899 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:22,404 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-07-09 18:05:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:05:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:22,406 INFO L225 Difference]: With dead ends: 355 [2021-07-09 18:05:22,406 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 18:05:22,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:05:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 18:05:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-07-09 18:05:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-07-09 18:05:22,410 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-07-09 18:05:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:22,411 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-07-09 18:05:22,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-07-09 18:05:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:22,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:22,411 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, 1] [2021-07-09 18:05:22,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:05:22,628 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -411893059, now seen corresponding path program 12 times [2021-07-09 18:05:22,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:22,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412748] [2021-07-09 18:05:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:22,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:22,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412748] [2021-07-09 18:05:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067563121] [2021-07-09 18:05:22,756 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 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 [2021-07-09 18:05:22,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:05:22,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:22,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:22,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:22,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:22,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:22,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:22,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067563121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:22,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:22,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:22,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006932923] [2021-07-09 18:05:22,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:22,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:22,980 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:23,470 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-07-09 18:05:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:05:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:23,471 INFO L225 Difference]: With dead ends: 392 [2021-07-09 18:05:23,471 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 18:05:23,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 18:05:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-07-09 18:05:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-07-09 18:05:23,476 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-07-09 18:05:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:23,477 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-07-09 18:05:23,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-07-09 18:05:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:23,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:23,477 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, 1] [2021-07-09 18:05:23,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:05:23,694 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1014349307, now seen corresponding path program 13 times [2021-07-09 18:05:23,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:23,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335437324] [2021-07-09 18:05:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:23,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:23,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335437324] [2021-07-09 18:05:23,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335437324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:23,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382901080] [2021-07-09 18:05:23,821 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 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 [2021-07-09 18:05:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:23,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:23,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:23,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:05:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382901080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:24,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345085877] [2021-07-09 18:05:24,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:24,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:24,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:24,059 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:24,679 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-07-09 18:05:24,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:05:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:24,681 INFO L225 Difference]: With dead ends: 435 [2021-07-09 18:05:24,681 INFO L226 Difference]: Without dead ends: 403 [2021-07-09 18:05:24,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-09 18:05:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-07-09 18:05:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-07-09 18:05:24,686 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-07-09 18:05:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:24,686 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-07-09 18:05:24,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-07-09 18:05:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:24,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:24,687 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, 1] [2021-07-09 18:05:24,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:24,903 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:24,903 INFO L82 PathProgramCache]: Analyzing trace with hash -6100203, now seen corresponding path program 14 times [2021-07-09 18:05:24,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:24,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491436103] [2021-07-09 18:05:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:25,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:25,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491436103] [2021-07-09 18:05:25,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491436103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:25,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593487892] [2021-07-09 18:05:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:05:25,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:25,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:25,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:25,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:25,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:25,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:25,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:25,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593487892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:25,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:25,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:25,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128313261] [2021-07-09 18:05:25,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:25,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:25,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:25,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:25,302 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:25,711 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-07-09 18:05:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:05:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:25,712 INFO L225 Difference]: With dead ends: 337 [2021-07-09 18:05:25,712 INFO L226 Difference]: Without dead ends: 309 [2021-07-09 18:05:25,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-09 18:05:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-07-09 18:05:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-07-09 18:05:25,717 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-07-09 18:05:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:25,717 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-07-09 18:05:25,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-07-09 18:05:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:25,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:25,718 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, 1] [2021-07-09 18:05:25,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:25,925 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:25,926 INFO L82 PathProgramCache]: Analyzing trace with hash 942965637, now seen corresponding path program 15 times [2021-07-09 18:05:25,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:25,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094874178] [2021-07-09 18:05:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:26,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094874178] [2021-07-09 18:05:26,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094874178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:26,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671496992] [2021-07-09 18:05:26,048 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 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 [2021-07-09 18:05:26,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:05:26,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:26,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:26,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:26,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:26,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:26,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:26,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671496992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:26,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:26,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:26,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804866356] [2021-07-09 18:05:26,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:26,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:26,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:26,275 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:26,771 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-07-09 18:05:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:05:26,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:26,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:26,772 INFO L225 Difference]: With dead ends: 343 [2021-07-09 18:05:26,772 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 18:05:26,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:05:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 18:05:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-07-09 18:05:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-07-09 18:05:26,777 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-07-09 18:05:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:26,777 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-07-09 18:05:26,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-07-09 18:05:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:26,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:26,778 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, 1] [2021-07-09 18:05:26,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:26,993 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1044029881, now seen corresponding path program 16 times [2021-07-09 18:05:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:26,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599292943] [2021-07-09 18:05:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:27,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599292943] [2021-07-09 18:05:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599292943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453006427] [2021-07-09 18:05:27,119 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 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 [2021-07-09 18:05:27,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:27,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:27,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:27,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:27,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:27,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:27,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:27,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453006427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304768448] [2021-07-09 18:05:27,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:27,357 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:27,833 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-07-09 18:05:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:05:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:27,835 INFO L225 Difference]: With dead ends: 378 [2021-07-09 18:05:27,835 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 18:05:27,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:05:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 18:05:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-07-09 18:05:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-07-09 18:05:27,839 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-07-09 18:05:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:27,840 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-07-09 18:05:27,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-07-09 18:05:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:27,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:27,840 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, 1] [2021-07-09 18:05:28,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:05:28,057 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 382212485, now seen corresponding path program 17 times [2021-07-09 18:05:28,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:28,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917940891] [2021-07-09 18:05:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:28,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:28,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917940891] [2021-07-09 18:05:28,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917940891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:28,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930438733] [2021-07-09 18:05:28,181 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 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 [2021-07-09 18:05:28,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:28,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:28,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:28,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930438733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:28,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:28,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:28,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296630547] [2021-07-09 18:05:28,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:28,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:28,427 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:29,056 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-07-09 18:05:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:29,058 INFO L225 Difference]: With dead ends: 410 [2021-07-09 18:05:29,058 INFO L226 Difference]: Without dead ends: 378 [2021-07-09 18:05:29,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 546.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:05:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-09 18:05:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-07-09 18:05:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-07-09 18:05:29,063 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-07-09 18:05:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:29,063 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-07-09 18:05:29,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-07-09 18:05:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:05:29,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:29,063 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, 1] [2021-07-09 18:05:29,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:05:29,271 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash -638237025, now seen corresponding path program 18 times [2021-07-09 18:05:29,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:29,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23062127] [2021-07-09 18:05:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:29,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:29,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23062127] [2021-07-09 18:05:29,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23062127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:29,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48784091] [2021-07-09 18:05:29,402 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 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 [2021-07-09 18:05:29,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:05:29,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:29,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:05:29,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:29,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:29,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:29,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:29,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:29,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-09 18:05:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:29,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48784091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:29,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:29,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:05:29,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259019806] [2021-07-09 18:05:29,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:05:29,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:05:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:05:29,630 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:30,089 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-07-09 18:05:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:05:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:05:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:30,090 INFO L225 Difference]: With dead ends: 307 [2021-07-09 18:05:30,090 INFO L226 Difference]: Without dead ends: 279 [2021-07-09 18:05:30,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:05:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-09 18:05:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-07-09 18:05:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-07-09 18:05:30,094 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-07-09 18:05:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:30,094 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-07-09 18:05:30,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-07-09 18:05:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:05:30,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:30,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:30,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:30,314 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash 480945784, now seen corresponding path program 19 times [2021-07-09 18:05:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:30,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690886046] [2021-07-09 18:05:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:30,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690886046] [2021-07-09 18:05:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690886046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487148505] [2021-07-09 18:05:30,360 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 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 [2021-07-09 18:05:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:05:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:05:30,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:30,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:30,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:30,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:05:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487148505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:30,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:05:30,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718316205] [2021-07-09 18:05:30,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:05:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:30,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:05:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:05:30,466 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-07-09 18:05:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:30,630 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-07-09 18:05:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:05:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 29 [2021-07-09 18:05:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:30,631 INFO L225 Difference]: With dead ends: 362 [2021-07-09 18:05:30,631 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 18:05:30,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:05:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 18:05:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-07-09 18:05:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-07-09 18:05:30,635 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-07-09 18:05:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:30,635 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-07-09 18:05:30,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-07-09 18:05:30,635 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-07-09 18:05:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:05:30,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:30,636 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:30,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:05:30,849 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1371755552, now seen corresponding path program 20 times [2021-07-09 18:05:30,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:30,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034102579] [2021-07-09 18:05:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:30,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034102579] [2021-07-09 18:05:30,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034102579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602377870] [2021-07-09 18:05:30,872 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 [2021-07-09 18:05:30,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:30,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:30,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:05:30,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602377870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:30,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:05:30,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125818798] [2021-07-09 18:05:30,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:05:30,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:05:30,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:05:30,933 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-07-09 18:05:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:30,954 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-07-09 18:05:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:05:30,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 30 [2021-07-09 18:05:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:30,956 INFO L225 Difference]: With dead ends: 534 [2021-07-09 18:05:30,956 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 18:05:30,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:05:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 18:05:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-07-09 18:05:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-07-09 18:05:30,962 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-07-09 18:05:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:30,962 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-07-09 18:05:30,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-07-09 18:05:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-07-09 18:05:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:30,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:30,963 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:31,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:31,179 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1245561707, now seen corresponding path program 21 times [2021-07-09 18:05:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:31,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601550762] [2021-07-09 18:05:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:31,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:31,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601550762] [2021-07-09 18:05:31,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601550762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:31,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213598914] [2021-07-09 18:05:31,425 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 [2021-07-09 18:05:31,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:05:31,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:31,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:31,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:31,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:31,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:31,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:31,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:05:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:31,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213598914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:31,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:31,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-07-09 18:05:31,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847489960] [2021-07-09 18:05:31,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:05:31,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:31,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:05:31,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:05:31,733 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:32,490 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-07-09 18:05:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:05:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:32,491 INFO L225 Difference]: With dead ends: 550 [2021-07-09 18:05:32,492 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 18:05:32,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:05:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 18:05:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-07-09 18:05:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-07-09 18:05:32,498 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-07-09 18:05:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:32,498 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-07-09 18:05:32,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-07-09 18:05:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:32,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:32,499 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:32,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:05:32,713 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash -482243373, now seen corresponding path program 22 times [2021-07-09 18:05:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:32,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443231332] [2021-07-09 18:05:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:32,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:32,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443231332] [2021-07-09 18:05:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443231332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:32,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151371668] [2021-07-09 18:05:32,971 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 [2021-07-09 18:05:32,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:33,204 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:05:33,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:05:33,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:33,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:33,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:33,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:05:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:33,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151371668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:33,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:33,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-09 18:05:33,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36642518] [2021-07-09 18:05:33,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:05:33,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:05:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:33,328 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:34,274 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-07-09 18:05:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:05:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:34,276 INFO L225 Difference]: With dead ends: 574 [2021-07-09 18:05:34,276 INFO L226 Difference]: Without dead ends: 526 [2021-07-09 18:05:34,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 845.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:05:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-09 18:05:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-07-09 18:05:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-07-09 18:05:34,282 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-07-09 18:05:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:34,282 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-07-09 18:05:34,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-07-09 18:05:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:34,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:34,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:34,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:34,497 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash 797128341, now seen corresponding path program 23 times [2021-07-09 18:05:34,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:34,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538039742] [2021-07-09 18:05:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:34,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538039742] [2021-07-09 18:05:34,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538039742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:34,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575802472] [2021-07-09 18:05:34,746 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 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 [2021-07-09 18:05:34,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:34,984 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:34,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:34,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:34,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:05:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575802472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:35,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-09 18:05:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910839741] [2021-07-09 18:05:35,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:05:35,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:05:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:05:35,138 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:36,075 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-07-09 18:05:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:05:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:36,077 INFO L225 Difference]: With dead ends: 599 [2021-07-09 18:05:36,077 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 18:05:36,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:05:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 18:05:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-07-09 18:05:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-07-09 18:05:36,083 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-07-09 18:05:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:36,084 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-07-09 18:05:36,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-07-09 18:05:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:36,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:36,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:36,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:05:36,300 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2112216365, now seen corresponding path program 24 times [2021-07-09 18:05:36,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:36,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145128865] [2021-07-09 18:05:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:36,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145128865] [2021-07-09 18:05:36,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145128865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:36,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164351369] [2021-07-09 18:05:36,556 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 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 [2021-07-09 18:05:36,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:05:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:05:36,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:36,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:36,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:36,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:36,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:36,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:36,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:05:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:36,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164351369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:36,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:36,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-09 18:05:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60710108] [2021-07-09 18:05:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:05:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:05:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:36,883 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:37,971 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-07-09 18:05:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:05:37,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:37,973 INFO L225 Difference]: With dead ends: 637 [2021-07-09 18:05:37,973 INFO L226 Difference]: Without dead ends: 589 [2021-07-09 18:05:37,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:05:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-09 18:05:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-07-09 18:05:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-07-09 18:05:37,979 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-07-09 18:05:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:37,980 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-07-09 18:05:37,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-07-09 18:05:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:37,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:37,980 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:38,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:38,189 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1541640341, now seen corresponding path program 25 times [2021-07-09 18:05:38,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:38,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323886895] [2021-07-09 18:05:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:38,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323886895] [2021-07-09 18:05:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323886895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78991305] [2021-07-09 18:05:38,419 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:38,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:38,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:38,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:38,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:38,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:05:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78991305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:38,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:38,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-09 18:05:38,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088046372] [2021-07-09 18:05:38,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:05:38,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:38,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:05:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:38,771 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:40,014 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-07-09 18:05:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:05:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:40,017 INFO L225 Difference]: With dead ends: 678 [2021-07-09 18:05:40,017 INFO L226 Difference]: Without dead ends: 646 [2021-07-09 18:05:40,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1121.5ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:05:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-09 18:05:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-07-09 18:05:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-07-09 18:05:40,023 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-07-09 18:05:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-07-09 18:05:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-07-09 18:05:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:40,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:40,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:05:40,238 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:40,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1327084589, now seen corresponding path program 26 times [2021-07-09 18:05:40,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:40,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299018839] [2021-07-09 18:05:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:40,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:40,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299018839] [2021-07-09 18:05:40,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299018839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:40,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000174874] [2021-07-09 18:05:40,477 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 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 [2021-07-09 18:05:40,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:40,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:40,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:40,691 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:05:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:05:40,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:40,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:40,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:40,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:05:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000174874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:40,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:40,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-09 18:05:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878485668] [2021-07-09 18:05:40,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:05:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:05:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:40,844 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:42,368 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-07-09 18:05:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:05:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:42,370 INFO L225 Difference]: With dead ends: 758 [2021-07-09 18:05:42,370 INFO L226 Difference]: Without dead ends: 714 [2021-07-09 18:05:42,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1324.7ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:05:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-07-09 18:05:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-07-09 18:05:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-07-09 18:05:42,378 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-07-09 18:05:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:42,378 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-07-09 18:05:42,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-07-09 18:05:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:42,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:42,379 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:42,593 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -293375473, now seen corresponding path program 27 times [2021-07-09 18:05:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:42,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496445151] [2021-07-09 18:05:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:42,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:42,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496445151] [2021-07-09 18:05:42,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496445151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:42,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579068708] [2021-07-09 18:05:42,841 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 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 [2021-07-09 18:05:42,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:05:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:43,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:43,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:43,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:43,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:43,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:43,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:05:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:43,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579068708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:43,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:43,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:43,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906406227] [2021-07-09 18:05:43,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:43,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:43,243 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:44,078 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-07-09 18:05:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:05:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:44,080 INFO L225 Difference]: With dead ends: 566 [2021-07-09 18:05:44,080 INFO L226 Difference]: Without dead ends: 538 [2021-07-09 18:05:44,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:05:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-09 18:05:44,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-07-09 18:05:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-07-09 18:05:44,086 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-07-09 18:05:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:44,086 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-07-09 18:05:44,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-07-09 18:05:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:44,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:44,087 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:44,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:05:44,293 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1738305687, now seen corresponding path program 28 times [2021-07-09 18:05:44,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:44,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411437561] [2021-07-09 18:05:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411437561] [2021-07-09 18:05:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411437561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506796456] [2021-07-09 18:05:44,551 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 [2021-07-09 18:05:44,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:44,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:44,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:44,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:44,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:44,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:44,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:44,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:05:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:44,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506796456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:44,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:44,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799320955] [2021-07-09 18:05:44,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:44,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:44,963 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:45,762 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-07-09 18:05:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:05:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:45,764 INFO L225 Difference]: With dead ends: 581 [2021-07-09 18:05:45,764 INFO L226 Difference]: Without dead ends: 533 [2021-07-09 18:05:45,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:05:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-09 18:05:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-07-09 18:05:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-07-09 18:05:45,776 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-07-09 18:05:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-07-09 18:05:45,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-07-09 18:05:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:45,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:45,777 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:45,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:05:45,989 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1277289895, now seen corresponding path program 29 times [2021-07-09 18:05:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:45,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000270337] [2021-07-09 18:05:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:46,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000270337] [2021-07-09 18:05:46,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000270337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589995467] [2021-07-09 18:05:46,240 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 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 [2021-07-09 18:05:46,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:46,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:46,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:46,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:46,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:46,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:46,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:05:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:46,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589995467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:46,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:46,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 18:05:46,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652829701] [2021-07-09 18:05:46,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:05:46,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:05:46,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:05:46,703 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:47,626 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-07-09 18:05:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:05:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:47,628 INFO L225 Difference]: With dead ends: 618 [2021-07-09 18:05:47,628 INFO L226 Difference]: Without dead ends: 570 [2021-07-09 18:05:47,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 950.9ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:05:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-09 18:05:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-07-09 18:05:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-07-09 18:05:47,634 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-07-09 18:05:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:47,634 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-07-09 18:05:47,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-07-09 18:05:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:47,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:47,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:47,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:05:47,849 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash 108332695, now seen corresponding path program 30 times [2021-07-09 18:05:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:47,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140234708] [2021-07-09 18:05:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:48,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:48,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140234708] [2021-07-09 18:05:48,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140234708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:48,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554452813] [2021-07-09 18:05:48,072 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 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 [2021-07-09 18:05:48,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:05:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:48,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:48,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:48,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:48,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:48,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:48,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:48,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:05:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:48,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554452813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:48,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:48,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:48,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597235112] [2021-07-09 18:05:48,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:48,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:48,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:48,527 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:49,759 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-07-09 18:05:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:05:49,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:49,761 INFO L225 Difference]: With dead ends: 656 [2021-07-09 18:05:49,761 INFO L226 Difference]: Without dead ends: 608 [2021-07-09 18:05:49,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 996.8ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:05:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-09 18:05:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-07-09 18:05:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-07-09 18:05:49,771 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-07-09 18:05:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:49,771 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-07-09 18:05:49,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-07-09 18:05:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:49,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:49,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:49,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:05:49,981 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -532777895, now seen corresponding path program 31 times [2021-07-09 18:05:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:49,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239727005] [2021-07-09 18:05:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:50,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239727005] [2021-07-09 18:05:50,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239727005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160953904] [2021-07-09 18:05:50,218 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 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 [2021-07-09 18:05:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:50,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:50,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:50,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:50,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:50,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:05:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160953904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:50,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:50,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:50,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435005860] [2021-07-09 18:05:50,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:50,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:50,637 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:51,788 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-07-09 18:05:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:05:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:51,791 INFO L225 Difference]: With dead ends: 689 [2021-07-09 18:05:51,791 INFO L226 Difference]: Without dead ends: 657 [2021-07-09 18:05:51,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:05:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-09 18:05:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-07-09 18:05:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-07-09 18:05:51,797 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-07-09 18:05:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:51,797 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-07-09 18:05:51,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-07-09 18:05:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:51,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:51,798 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:52,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:52,014 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash 893464471, now seen corresponding path program 32 times [2021-07-09 18:05:52,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:52,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242589696] [2021-07-09 18:05:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:52,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242589696] [2021-07-09 18:05:52,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242589696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505346358] [2021-07-09 18:05:52,238 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 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 [2021-07-09 18:05:52,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:52,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:52,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:52,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:52,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:52,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:52,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:05:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:52,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505346358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:52,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:52,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879845630] [2021-07-09 18:05:52,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:52,640 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:54,076 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-07-09 18:05:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:05:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:54,078 INFO L225 Difference]: With dead ends: 757 [2021-07-09 18:05:54,078 INFO L226 Difference]: Without dead ends: 713 [2021-07-09 18:05:54,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1165.7ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:05:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-09 18:05:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-07-09 18:05:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-07-09 18:05:54,085 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-07-09 18:05:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:54,085 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-07-09 18:05:54,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-07-09 18:05:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:54,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:54,086 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:54,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-09 18:05:54,306 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 255748759, now seen corresponding path program 33 times [2021-07-09 18:05:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:54,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223249901] [2021-07-09 18:05:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223249901] [2021-07-09 18:05:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223249901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694619021] [2021-07-09 18:05:54,530 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 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 [2021-07-09 18:05:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:05:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:54,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:54,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:54,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:54,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:54,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:54,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:05:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694619021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:54,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473553481] [2021-07-09 18:05:54,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:54,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:54,990 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:55,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:55,880 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-07-09 18:05:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:05:55,880 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:55,882 INFO L225 Difference]: With dead ends: 579 [2021-07-09 18:05:55,882 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 18:05:55,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 902.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:05:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 18:05:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-07-09 18:05:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-07-09 18:05:55,887 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-07-09 18:05:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:55,888 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-07-09 18:05:55,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-07-09 18:05:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:55,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:55,888 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:56,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:05:56,103 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1562594731, now seen corresponding path program 34 times [2021-07-09 18:05:56,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:56,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200953700] [2021-07-09 18:05:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:56,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200953700] [2021-07-09 18:05:56,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200953700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:56,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737293232] [2021-07-09 18:05:56,357 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 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 [2021-07-09 18:05:56,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:56,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:05:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:56,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:05:56,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:56,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:56,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:56,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:05:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737293232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482041359] [2021-07-09 18:05:56,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:56,782 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:57,488 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-07-09 18:05:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:57,490 INFO L225 Difference]: With dead ends: 557 [2021-07-09 18:05:57,490 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 18:05:57,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 874.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:05:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 18:05:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-07-09 18:05:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-07-09 18:05:57,495 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-07-09 18:05:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:57,495 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-07-09 18:05:57,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-07-09 18:05:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:57,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:57,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:57,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:57,712 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -176972141, now seen corresponding path program 35 times [2021-07-09 18:05:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754898853] [2021-07-09 18:05:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:57,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754898853] [2021-07-09 18:05:57,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754898853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:57,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963724100] [2021-07-09 18:05:57,963 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 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 [2021-07-09 18:05:57,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:57,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:05:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:58,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:58,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:58,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:58,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:58,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:05:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963724100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:58,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:58,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:05:58,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617138548] [2021-07-09 18:05:58,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:05:58,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:05:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:58,373 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:59,337 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-07-09 18:05:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:05:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:05:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:59,339 INFO L225 Difference]: With dead ends: 562 [2021-07-09 18:05:59,339 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 18:05:59,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:05:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 18:05:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-07-09 18:05:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-07-09 18:05:59,344 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-07-09 18:05:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:59,344 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-07-09 18:05:59,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-07-09 18:05:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:05:59,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:59,345 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:59,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:05:59,552 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash -818082731, now seen corresponding path program 36 times [2021-07-09 18:05:59,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:59,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070479568] [2021-07-09 18:05:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:59,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070479568] [2021-07-09 18:05:59,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070479568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215302866] [2021-07-09 18:05:59,782 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 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 [2021-07-09 18:05:59,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:05:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:05:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:00,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:00,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:00,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:00,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:00,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:00,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:00,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215302866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:00,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:00,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:00,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633893659] [2021-07-09 18:06:00,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:00,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:00,147 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:01,179 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-07-09 18:06:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:06:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:01,181 INFO L225 Difference]: With dead ends: 596 [2021-07-09 18:06:01,181 INFO L226 Difference]: Without dead ends: 564 [2021-07-09 18:06:01,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 963.9ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:06:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-09 18:06:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-07-09 18:06:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-07-09 18:06:01,187 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-07-09 18:06:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:01,187 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-07-09 18:06:01,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-07-09 18:06:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:01,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:01,187 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:01,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:01,393 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash 608159635, now seen corresponding path program 37 times [2021-07-09 18:06:01,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:01,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821165905] [2021-07-09 18:06:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:01,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:01,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821165905] [2021-07-09 18:06:01,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821165905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:01,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482924745] [2021-07-09 18:06:01,642 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 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 [2021-07-09 18:06:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:01,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:01,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:01,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:01,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:01,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:01,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:01,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482924745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:02,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:02,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028044197] [2021-07-09 18:06:02,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:02,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:02,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:02,012 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:03,425 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-07-09 18:06:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:06:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:03,427 INFO L225 Difference]: With dead ends: 658 [2021-07-09 18:06:03,427 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 18:06:03,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1254.0ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:06:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 18:06:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-07-09 18:06:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-07-09 18:06:03,433 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-07-09 18:06:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:03,433 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-07-09 18:06:03,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-07-09 18:06:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:03,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:03,434 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:03,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:06:03,638 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:03,639 INFO L82 PathProgramCache]: Analyzing trace with hash -306473111, now seen corresponding path program 38 times [2021-07-09 18:06:03,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:03,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247593717] [2021-07-09 18:06:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:03,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:03,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247593717] [2021-07-09 18:06:03,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247593717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:03,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062094723] [2021-07-09 18:06:03,871 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:03,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:04,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:04,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:04,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:04,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:06:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:04,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062094723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:04,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:04,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:04,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513883078] [2021-07-09 18:06:04,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:04,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:04,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:04,236 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:05,159 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-07-09 18:06:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:05,161 INFO L225 Difference]: With dead ends: 556 [2021-07-09 18:06:05,161 INFO L226 Difference]: Without dead ends: 528 [2021-07-09 18:06:05,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:06:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-09 18:06:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-07-09 18:06:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-07-09 18:06:05,166 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-07-09 18:06:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:05,166 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-07-09 18:06:05,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-07-09 18:06:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:05,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:05,167 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:05,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,377 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1502778699, now seen corresponding path program 39 times [2021-07-09 18:06:05,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:05,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000471227] [2021-07-09 18:06:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000471227] [2021-07-09 18:06:05,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000471227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442681424] [2021-07-09 18:06:05,636 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 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 [2021-07-09 18:06:05,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:06:05,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:05,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:05,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:05,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:05,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:05,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442681424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:06,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967270439] [2021-07-09 18:06:06,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:06,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:06,063 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:06,980 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-07-09 18:06:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:06,982 INFO L225 Difference]: With dead ends: 607 [2021-07-09 18:06:06,982 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 18:06:06,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 904.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:06:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 18:06:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-07-09 18:06:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-07-09 18:06:06,988 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-07-09 18:06:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:06,988 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-07-09 18:06:06,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-07-09 18:06:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:06,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:06,989 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:07,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:06:07,202 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:07,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1512816883, now seen corresponding path program 40 times [2021-07-09 18:06:07,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:07,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365208978] [2021-07-09 18:06:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:07,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365208978] [2021-07-09 18:06:07,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365208978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689538851] [2021-07-09 18:06:07,456 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 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 [2021-07-09 18:06:07,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:07,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:07,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:07,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689538851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:07,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:07,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606862276] [2021-07-09 18:06:07,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:07,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:07,875 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:08,792 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-07-09 18:06:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:08,794 INFO L225 Difference]: With dead ends: 644 [2021-07-09 18:06:08,794 INFO L226 Difference]: Without dead ends: 596 [2021-07-09 18:06:08,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 886.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:06:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-09 18:06:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-07-09 18:06:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-07-09 18:06:08,800 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-07-09 18:06:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:08,800 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-07-09 18:06:08,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-07-09 18:06:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:08,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:08,801 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:09,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:06:09,017 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash -127194293, now seen corresponding path program 41 times [2021-07-09 18:06:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716295259] [2021-07-09 18:06:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716295259] [2021-07-09 18:06:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716295259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989706774] [2021-07-09 18:06:09,276 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 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 [2021-07-09 18:06:09,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:06:09,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:06:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:09,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:09,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:09,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:09,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:09,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989706774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:09,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:09,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035590898] [2021-07-09 18:06:09,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:09,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:09,674 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:10,829 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-07-09 18:06:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:06:10,829 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:10,831 INFO L225 Difference]: With dead ends: 682 [2021-07-09 18:06:10,831 INFO L226 Difference]: Without dead ends: 634 [2021-07-09 18:06:10,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 962.0ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:06:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-07-09 18:06:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-07-09 18:06:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-07-09 18:06:10,842 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-07-09 18:06:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:10,842 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-07-09 18:06:10,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-07-09 18:06:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:10,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:10,843 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:11,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:11,043 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -768304883, now seen corresponding path program 42 times [2021-07-09 18:06:11,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:11,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829488798] [2021-07-09 18:06:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829488798] [2021-07-09 18:06:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829488798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940312550] [2021-07-09 18:06:11,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:06:11,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:06:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:11,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:11,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940312550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:11,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:11,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345862742] [2021-07-09 18:06:11,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:11,672 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:12,813 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-07-09 18:06:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:06:12,813 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:12,815 INFO L225 Difference]: With dead ends: 715 [2021-07-09 18:06:12,815 INFO L226 Difference]: Without dead ends: 683 [2021-07-09 18:06:12,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:06:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-09 18:06:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-07-09 18:06:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-07-09 18:06:12,821 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-07-09 18:06:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:12,821 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-07-09 18:06:12,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-07-09 18:06:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:12,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:12,822 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:13,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:06:13,037 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 657937483, now seen corresponding path program 43 times [2021-07-09 18:06:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:13,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388002975] [2021-07-09 18:06:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:13,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388002975] [2021-07-09 18:06:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388002975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:13,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842253320] [2021-07-09 18:06:13,267 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 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 [2021-07-09 18:06:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:13,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:13,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:13,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:13,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:13,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:13,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842253320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:13,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:13,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50981666] [2021-07-09 18:06:13,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:13,660 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:15,215 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-07-09 18:06:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:06:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:15,217 INFO L225 Difference]: With dead ends: 783 [2021-07-09 18:06:15,217 INFO L226 Difference]: Without dead ends: 739 [2021-07-09 18:06:15,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1184.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:06:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-09 18:06:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-07-09 18:06:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-07-09 18:06:15,223 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-07-09 18:06:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:15,223 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-07-09 18:06:15,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-07-09 18:06:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:15,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:15,224 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:15,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:15,440 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash 20221771, now seen corresponding path program 44 times [2021-07-09 18:06:15,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:15,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096329208] [2021-07-09 18:06:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096329208] [2021-07-09 18:06:15,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096329208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405371473] [2021-07-09 18:06:15,678 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 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 [2021-07-09 18:06:15,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:15,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:15,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:15,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:15,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:15,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:15,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:15,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:15,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:06:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:16,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405371473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:16,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:16,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034350828] [2021-07-09 18:06:16,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:16,056 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:16,857 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-07-09 18:06:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:06:16,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:16,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:16,859 INFO L225 Difference]: With dead ends: 605 [2021-07-09 18:06:16,859 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 18:06:16,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:06:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 18:06:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-07-09 18:06:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-07-09 18:06:16,865 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-07-09 18:06:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:16,865 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-07-09 18:06:16,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-07-09 18:06:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:16,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:16,865 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:17,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:17,081 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1798121719, now seen corresponding path program 45 times [2021-07-09 18:06:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933819717] [2021-07-09 18:06:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933819717] [2021-07-09 18:06:17,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933819717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680857830] [2021-07-09 18:06:17,353 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 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 [2021-07-09 18:06:17,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:17,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:17,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:17,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:17,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680857830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:17,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:17,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652442489] [2021-07-09 18:06:17,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:17,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:17,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:17,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:17,747 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:18,538 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-07-09 18:06:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:06:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:18,539 INFO L225 Difference]: With dead ends: 583 [2021-07-09 18:06:18,539 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 18:06:18,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:06:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 18:06:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-07-09 18:06:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-07-09 18:06:18,544 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-07-09 18:06:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:18,544 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-07-09 18:06:18,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-07-09 18:06:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:18,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:18,545 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:18,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:06:18,749 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -412499129, now seen corresponding path program 46 times [2021-07-09 18:06:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944488783] [2021-07-09 18:06:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:19,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:19,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944488783] [2021-07-09 18:06:19,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944488783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:19,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962594470] [2021-07-09 18:06:19,014 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 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 [2021-07-09 18:06:19,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:19,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:19,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:19,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962594470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:19,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:19,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:19,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451452505] [2021-07-09 18:06:19,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:19,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:19,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:19,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:19,417 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:20,855 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-07-09 18:06:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:06:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:20,856 INFO L225 Difference]: With dead ends: 708 [2021-07-09 18:06:20,856 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 18:06:20,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1323.2ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:06:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 18:06:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-07-09 18:06:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-07-09 18:06:20,862 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-07-09 18:06:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:20,862 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-07-09 18:06:20,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-07-09 18:06:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:20,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:20,862 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:21,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:21,063 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1053609719, now seen corresponding path program 47 times [2021-07-09 18:06:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279686735] [2021-07-09 18:06:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279686735] [2021-07-09 18:06:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279686735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125239273] [2021-07-09 18:06:21,302 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 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 [2021-07-09 18:06:21,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:06:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:21,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:21,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:21,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:21,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125239273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:21,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-09 18:06:21,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117056515] [2021-07-09 18:06:21,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:06:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:06:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:06:21,704 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:23,276 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-07-09 18:06:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:06:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:23,277 INFO L225 Difference]: With dead ends: 736 [2021-07-09 18:06:23,277 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 18:06:23,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1360.7ms TimeCoverageRelationStatistics Valid=441, Invalid=3719, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:06:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 18:06:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-07-09 18:06:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-07-09 18:06:23,283 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-07-09 18:06:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:23,283 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-07-09 18:06:23,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-07-09 18:06:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:23,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:23,284 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:23,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:06:23,497 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash 372632647, now seen corresponding path program 48 times [2021-07-09 18:06:23,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:23,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766687787] [2021-07-09 18:06:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766687787] [2021-07-09 18:06:23,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766687787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918129897] [2021-07-09 18:06:23,734 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 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 [2021-07-09 18:06:23,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:06:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:23,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:23,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:23,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:23,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:24,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918129897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:24,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:24,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542418789] [2021-07-09 18:06:24,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:24,115 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:26,053 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-07-09 18:06:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:06:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:26,054 INFO L225 Difference]: With dead ends: 829 [2021-07-09 18:06:26,054 INFO L226 Difference]: Without dead ends: 753 [2021-07-09 18:06:26,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1616.8ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:06:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-07-09 18:06:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-07-09 18:06:26,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-07-09 18:06:26,061 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-07-09 18:06:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:26,061 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-07-09 18:06:26,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-07-09 18:06:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:26,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:26,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:26,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:06:26,262 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash -542000099, now seen corresponding path program 49 times [2021-07-09 18:06:26,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:26,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100365475] [2021-07-09 18:06:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:26,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100365475] [2021-07-09 18:06:26,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100365475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634009752] [2021-07-09 18:06:26,524 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:26,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:26,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:26,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:06:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634009752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:26,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:26,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11716273] [2021-07-09 18:06:26,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:26,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:26,914 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:28,153 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-07-09 18:06:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:06:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:28,155 INFO L225 Difference]: With dead ends: 652 [2021-07-09 18:06:28,155 INFO L226 Difference]: Without dead ends: 596 [2021-07-09 18:06:28,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1299.0ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:06:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-09 18:06:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-07-09 18:06:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-07-09 18:06:28,160 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-07-09 18:06:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:28,160 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-07-09 18:06:28,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-07-09 18:06:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:28,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:28,161 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:28,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:06:28,361 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2125436613, now seen corresponding path program 50 times [2021-07-09 18:06:28,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:28,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790506644] [2021-07-09 18:06:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:28,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:28,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790506644] [2021-07-09 18:06:28,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790506644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:28,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302259779] [2021-07-09 18:06:28,608 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 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 [2021-07-09 18:06:28,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:28,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:28,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:28,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:28,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:28,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:28,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:28,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302259779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:28,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:28,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257350526] [2021-07-09 18:06:28,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:28,999 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:29,813 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-07-09 18:06:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:06:29,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:29,815 INFO L225 Difference]: With dead ends: 637 [2021-07-09 18:06:29,815 INFO L226 Difference]: Without dead ends: 589 [2021-07-09 18:06:29,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:06:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-09 18:06:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-07-09 18:06:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-07-09 18:06:29,820 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-07-09 18:06:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:29,820 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-07-09 18:06:29,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-07-09 18:06:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:29,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:29,821 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:30,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:06:30,022 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -739814023, now seen corresponding path program 51 times [2021-07-09 18:06:30,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:30,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49032880] [2021-07-09 18:06:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:30,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49032880] [2021-07-09 18:06:30,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49032880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422072792] [2021-07-09 18:06:30,295 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) [2021-07-09 18:06:30,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:30,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:30,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:30,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:30,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:30,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:30,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422072792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:30,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070638519] [2021-07-09 18:06:30,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:30,706 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:32,156 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-07-09 18:06:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:06:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:32,158 INFO L225 Difference]: With dead ends: 764 [2021-07-09 18:06:32,158 INFO L226 Difference]: Without dead ends: 669 [2021-07-09 18:06:32,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1370.9ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:06:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-07-09 18:06:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-07-09 18:06:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-07-09 18:06:32,164 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-07-09 18:06:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:32,165 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-07-09 18:06:32,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-07-09 18:06:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:32,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:32,165 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:32,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:32,366 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1380924613, now seen corresponding path program 52 times [2021-07-09 18:06:32,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:32,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993354184] [2021-07-09 18:06:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993354184] [2021-07-09 18:06:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993354184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434906117] [2021-07-09 18:06:32,617 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 [2021-07-09 18:06:32,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:32,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:32,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:32,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:32,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:32,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:32,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434906117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:32,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365694308] [2021-07-09 18:06:32,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:32,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:32,988 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:34,751 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-07-09 18:06:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:06:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:34,752 INFO L225 Difference]: With dead ends: 788 [2021-07-09 18:06:34,752 INFO L226 Difference]: Without dead ends: 720 [2021-07-09 18:06:34,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:06:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-09 18:06:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-07-09 18:06:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-07-09 18:06:34,759 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-07-09 18:06:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:34,759 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-07-09 18:06:34,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-07-09 18:06:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:34,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:34,760 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:34,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:34,976 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:34,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:34,976 INFO L82 PathProgramCache]: Analyzing trace with hash 45317753, now seen corresponding path program 53 times [2021-07-09 18:06:34,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:34,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901269569] [2021-07-09 18:06:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:35,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901269569] [2021-07-09 18:06:35,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901269569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:35,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39206631] [2021-07-09 18:06:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:06:35,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:06:35,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:06:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:35,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:35,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:35,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:35,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:35,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:35,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39206631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:35,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:35,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993426424] [2021-07-09 18:06:35,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:35,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:35,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:35,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:35,618 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:37,778 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-07-09 18:06:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:06:37,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:37,779 INFO L225 Difference]: With dead ends: 888 [2021-07-09 18:06:37,779 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 18:06:37,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 1862.7ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:06:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 18:06:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-07-09 18:06:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-07-09 18:06:37,786 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-07-09 18:06:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:37,786 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-07-09 18:06:37,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-07-09 18:06:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:37,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:37,787 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:37,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:37,987 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash -869314993, now seen corresponding path program 54 times [2021-07-09 18:06:37,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:37,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962052069] [2021-07-09 18:06:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:38,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962052069] [2021-07-09 18:06:38,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962052069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829067197] [2021-07-09 18:06:38,226 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 [2021-07-09 18:06:38,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:38,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:06:38,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:38,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:38,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:38,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-09 18:06:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829067197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:38,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:38,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819989558] [2021-07-09 18:06:38,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:38,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:38,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:38,585 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:39,855 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-07-09 18:06:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:06:39,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:39,856 INFO L225 Difference]: With dead ends: 715 [2021-07-09 18:06:39,856 INFO L226 Difference]: Without dead ends: 659 [2021-07-09 18:06:39,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1225.4ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:06:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-07-09 18:06:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-07-09 18:06:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-07-09 18:06:39,862 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-07-09 18:06:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:39,862 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-07-09 18:06:39,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-07-09 18:06:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:39,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:39,863 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:40,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:06:40,063 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash -865898715, now seen corresponding path program 55 times [2021-07-09 18:06:40,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:40,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073296910] [2021-07-09 18:06:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:40,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:40,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073296910] [2021-07-09 18:06:40,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073296910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:40,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308028275] [2021-07-09 18:06:40,348 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 [2021-07-09 18:06:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:40,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:40,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:40,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:40,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:40,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:40,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308028275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:40,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:40,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910443051] [2021-07-09 18:06:40,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:40,745 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:42,471 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-07-09 18:06:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:06:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:42,472 INFO L225 Difference]: With dead ends: 766 [2021-07-09 18:06:42,472 INFO L226 Difference]: Without dead ends: 678 [2021-07-09 18:06:42,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1585.7ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:06:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-09 18:06:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-07-09 18:06:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-07-09 18:06:42,478 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-07-09 18:06:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:42,479 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-07-09 18:06:42,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-07-09 18:06:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:42,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:42,479 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:42,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:42,680 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1507009305, now seen corresponding path program 56 times [2021-07-09 18:06:42,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:42,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561749681] [2021-07-09 18:06:42,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:42,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561749681] [2021-07-09 18:06:42,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561749681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012198930] [2021-07-09 18:06:42,940 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 [2021-07-09 18:06:42,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:42,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:43,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:43,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:43,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:43,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:43,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012198930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:43,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:43,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:43,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910987751] [2021-07-09 18:06:43,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:43,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:43,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:43,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:43,295 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:45,060 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-07-09 18:06:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:06:45,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:45,062 INFO L225 Difference]: With dead ends: 771 [2021-07-09 18:06:45,062 INFO L226 Difference]: Without dead ends: 707 [2021-07-09 18:06:45,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1504.4ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:06:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-07-09 18:06:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-07-09 18:06:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-07-09 18:06:45,068 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-07-09 18:06:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:45,068 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-07-09 18:06:45,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-07-09 18:06:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:45,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:45,069 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:45,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:06:45,288 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -80766939, now seen corresponding path program 57 times [2021-07-09 18:06:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:45,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184359874] [2021-07-09 18:06:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:45,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184359874] [2021-07-09 18:06:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184359874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804224552] [2021-07-09 18:06:45,543 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 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 [2021-07-09 18:06:45,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:45,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:45,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:45,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:45,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804224552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:45,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:45,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800565390] [2021-07-09 18:06:45,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:45,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:45,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:45,896 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:48,120 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-07-09 18:06:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:06:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:48,121 INFO L225 Difference]: With dead ends: 823 [2021-07-09 18:06:48,121 INFO L226 Difference]: Without dead ends: 767 [2021-07-09 18:06:48,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1736.9ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:06:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-07-09 18:06:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-07-09 18:06:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-07-09 18:06:48,127 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-07-09 18:06:48,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:48,127 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-07-09 18:06:48,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-07-09 18:06:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:48,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:48,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:48,328 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -185613557, now seen corresponding path program 58 times [2021-07-09 18:06:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:48,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507240505] [2021-07-09 18:06:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:48,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:48,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507240505] [2021-07-09 18:06:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507240505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437250360] [2021-07-09 18:06:48,609 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 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 [2021-07-09 18:06:48,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:48,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:48,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:48,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:48,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:48,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:06:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:48,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437250360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:48,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:48,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-09 18:06:48,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068224111] [2021-07-09 18:06:48,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:06:48,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:48,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:06:48,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:48,970 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:50,306 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-07-09 18:06:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:06:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:50,308 INFO L225 Difference]: With dead ends: 729 [2021-07-09 18:06:50,308 INFO L226 Difference]: Without dead ends: 673 [2021-07-09 18:06:50,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1354.7ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:06:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-07-09 18:06:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-07-09 18:06:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-07-09 18:06:50,314 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-07-09 18:06:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:50,314 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-07-09 18:06:50,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-07-09 18:06:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:50,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:50,315 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:50,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:06:50,515 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash -931000177, now seen corresponding path program 59 times [2021-07-09 18:06:50,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:50,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358272319] [2021-07-09 18:06:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:50,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358272319] [2021-07-09 18:06:50,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358272319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492346369] [2021-07-09 18:06:50,764 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 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 [2021-07-09 18:06:50,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:06:50,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:06:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:51,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:51,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:51,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:06:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:51,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492346369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:51,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:51,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2021-07-09 18:06:51,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506120378] [2021-07-09 18:06:51,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:06:51,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:06:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:06:51,342 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:52,102 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-07-09 18:06:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:52,103 INFO L225 Difference]: With dead ends: 722 [2021-07-09 18:06:52,103 INFO L226 Difference]: Without dead ends: 674 [2021-07-09 18:06:52,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1041.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2421, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:06:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-07-09 18:06:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-07-09 18:06:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-07-09 18:06:52,109 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-07-09 18:06:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:52,109 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-07-09 18:06:52,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-07-09 18:06:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:52,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:52,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:52,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:52,310 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash 348371537, now seen corresponding path program 60 times [2021-07-09 18:06:52,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:52,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16162042] [2021-07-09 18:06:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:52,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16162042] [2021-07-09 18:06:52,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16162042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:52,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238078293] [2021-07-09 18:06:52,535 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 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 [2021-07-09 18:06:52,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:52,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:52,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:52,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:52,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:52,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238078293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:52,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:52,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:06:52,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028293018] [2021-07-09 18:06:52,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:06:52,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:06:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:06:52,971 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:53,933 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-07-09 18:06:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:53,935 INFO L225 Difference]: With dead ends: 759 [2021-07-09 18:06:53,935 INFO L226 Difference]: Without dead ends: 711 [2021-07-09 18:06:53,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 903.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:06:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-09 18:06:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-07-09 18:06:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-07-09 18:06:53,941 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-07-09 18:06:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:53,941 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-07-09 18:06:53,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:53,941 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-07-09 18:06:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:53,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:53,942 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:54,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:06:54,142 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1733994127, now seen corresponding path program 61 times [2021-07-09 18:06:54,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:54,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158870258] [2021-07-09 18:06:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:54,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:54,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158870258] [2021-07-09 18:06:54,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158870258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:54,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239109319] [2021-07-09 18:06:54,371 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 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 [2021-07-09 18:06:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:54,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:54,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:54,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:54,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:54,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:54,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:54,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:54,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239109319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:54,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:54,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:06:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480455326] [2021-07-09 18:06:54,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:06:54,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:06:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:06:54,790 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:55,982 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-07-09 18:06:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:06:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:55,984 INFO L225 Difference]: With dead ends: 797 [2021-07-09 18:06:55,984 INFO L226 Difference]: Without dead ends: 749 [2021-07-09 18:06:55,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:06:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-09 18:06:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-07-09 18:06:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-07-09 18:06:55,990 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-07-09 18:06:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:55,990 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-07-09 18:06:55,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-07-09 18:06:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:55,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:55,991 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:56,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-09 18:06:56,209 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1092883537, now seen corresponding path program 62 times [2021-07-09 18:06:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272221738] [2021-07-09 18:06:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:56,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272221738] [2021-07-09 18:06:56,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272221738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102411415] [2021-07-09 18:06:56,427 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 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 [2021-07-09 18:06:56,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:56,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:56,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:56,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:56,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:56,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:56,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102411415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:56,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:06:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492572031] [2021-07-09 18:06:56,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:06:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:06:56,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:06:56,839 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:57,931 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-07-09 18:06:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:06:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:06:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:57,932 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:06:57,932 INFO L226 Difference]: Without dead ends: 798 [2021-07-09 18:06:57,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1028.3ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:06:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-07-09 18:06:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-07-09 18:06:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-07-09 18:06:57,952 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-07-09 18:06:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:57,952 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-07-09 18:06:57,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-07-09 18:06:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:06:57,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:57,953 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:58,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:58,169 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1775841393, now seen corresponding path program 63 times [2021-07-09 18:06:58,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:58,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611587364] [2021-07-09 18:06:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611587364] [2021-07-09 18:06:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611587364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553595950] [2021-07-09 18:06:58,394 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 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 [2021-07-09 18:06:58,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:58,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:06:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:58,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:06:58,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:58,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:06:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553595950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:58,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:06:58,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266786209] [2021-07-09 18:06:58,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:06:58,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:06:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:06:58,859 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:00,177 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-07-09 18:07:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:07:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:00,179 INFO L225 Difference]: With dead ends: 897 [2021-07-09 18:07:00,179 INFO L226 Difference]: Without dead ends: 853 [2021-07-09 18:07:00,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1245.9ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:07:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-07-09 18:07:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-07-09 18:07:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-07-09 18:07:00,185 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-07-09 18:07:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:00,186 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-07-09 18:07:00,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-07-09 18:07:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:00,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:00,186 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:00,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:00,387 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1881410191, now seen corresponding path program 64 times [2021-07-09 18:07:00,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:00,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624987761] [2021-07-09 18:07:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:00,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:00,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624987761] [2021-07-09 18:07:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624987761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:00,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988267946] [2021-07-09 18:07:00,613 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 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 [2021-07-09 18:07:00,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:00,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:00,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:00,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:00,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:00,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:07:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:01,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988267946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:01,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:01,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:01,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195420497] [2021-07-09 18:07:01,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:01,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:01,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:01,022 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:01,876 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-07-09 18:07:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:07:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:01,877 INFO L225 Difference]: With dead ends: 720 [2021-07-09 18:07:01,877 INFO L226 Difference]: Without dead ends: 692 [2021-07-09 18:07:01,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 905.9ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:07:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-07-09 18:07:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-07-09 18:07:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-07-09 18:07:01,883 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-07-09 18:07:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:01,883 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-07-09 18:07:01,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-07-09 18:07:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:01,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:01,884 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:02,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 18:07:02,084 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash 63066701, now seen corresponding path program 65 times [2021-07-09 18:07:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675934143] [2021-07-09 18:07:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675934143] [2021-07-09 18:07:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675934143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926785550] [2021-07-09 18:07:02,326 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 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 [2021-07-09 18:07:02,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:07:02,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:02,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:02,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:02,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:02,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:02,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:02,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926785550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:02,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-09 18:07:02,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836945350] [2021-07-09 18:07:02,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:07:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:02,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:07:02,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:07:02,788 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:03,937 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-07-09 18:07:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:07:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:03,938 INFO L225 Difference]: With dead ends: 760 [2021-07-09 18:07:03,938 INFO L226 Difference]: Without dead ends: 664 [2021-07-09 18:07:03,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=302, Invalid=3238, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:07:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-07-09 18:07:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-07-09 18:07:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-07-09 18:07:03,944 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-07-09 18:07:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:03,944 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-07-09 18:07:03,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-07-09 18:07:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:03,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:03,945 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:04,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:04,161 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1448689291, now seen corresponding path program 66 times [2021-07-09 18:07:04,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:04,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566603532] [2021-07-09 18:07:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:04,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:04,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566603532] [2021-07-09 18:07:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566603532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:04,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81562514] [2021-07-09 18:07:04,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:04,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:07:04,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:04,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:04,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:04,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:04,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:04,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:04,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81562514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:04,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:04,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332748045] [2021-07-09 18:07:04,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:04,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:04,851 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:06,296 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-07-09 18:07:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:07:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:06,297 INFO L225 Difference]: With dead ends: 806 [2021-07-09 18:07:06,297 INFO L226 Difference]: Without dead ends: 711 [2021-07-09 18:07:06,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1377.2ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:07:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-09 18:07:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-07-09 18:07:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-07-09 18:07:06,303 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-07-09 18:07:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:06,303 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-07-09 18:07:06,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-07-09 18:07:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:06,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:06,304 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-09 18:07:06,516 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 807578701, now seen corresponding path program 67 times [2021-07-09 18:07:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:06,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416442050] [2021-07-09 18:07:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:06,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:06,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416442050] [2021-07-09 18:07:06,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416442050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:06,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450897316] [2021-07-09 18:07:06,754 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 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 [2021-07-09 18:07:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:06,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:07,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:07,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:07,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:07,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450897316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:07,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:07,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567280283] [2021-07-09 18:07:07,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:07,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:07,141 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:08,661 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-07-09 18:07:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:07:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:08,662 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:07:08,662 INFO L226 Difference]: Without dead ends: 762 [2021-07-09 18:07:08,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1358.6ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:07:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-09 18:07:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-07-09 18:07:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-07-09 18:07:08,669 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-07-09 18:07:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:08,669 INFO L482 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-07-09 18:07:08,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-07-09 18:07:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:08,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:08,669 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:08,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:08,870 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:08,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2061146229, now seen corresponding path program 68 times [2021-07-09 18:07:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:08,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11374706] [2021-07-09 18:07:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:09,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:09,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11374706] [2021-07-09 18:07:09,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11374706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:09,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454879936] [2021-07-09 18:07:09,099 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 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 [2021-07-09 18:07:09,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:09,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:09,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:09,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454879936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:09,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:09,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783799821] [2021-07-09 18:07:09,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:09,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:09,524 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:11,445 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-07-09 18:07:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:07:11,445 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:11,446 INFO L225 Difference]: With dead ends: 939 [2021-07-09 18:07:11,447 INFO L226 Difference]: Without dead ends: 863 [2021-07-09 18:07:11,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1651.5ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:07:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-07-09 18:07:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-07-09 18:07:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-07-09 18:07:11,453 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-07-09 18:07:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:11,453 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-07-09 18:07:11,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-07-09 18:07:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:11,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:11,454 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:11,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:07:11,663 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1319188321, now seen corresponding path program 69 times [2021-07-09 18:07:11,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:11,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676406289] [2021-07-09 18:07:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:11,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676406289] [2021-07-09 18:07:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676406289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:11,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942115135] [2021-07-09 18:07:11,904 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 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 [2021-07-09 18:07:11,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:07:11,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:12,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:12,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:12,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:12,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:12,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:07:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942115135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:12,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:12,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167495917] [2021-07-09 18:07:12,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:12,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:12,294 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:13,613 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-07-09 18:07:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:07:13,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:13,614 INFO L225 Difference]: With dead ends: 762 [2021-07-09 18:07:13,614 INFO L226 Difference]: Without dead ends: 706 [2021-07-09 18:07:13,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:07:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-09 18:07:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-07-09 18:07:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-07-09 18:07:13,621 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-07-09 18:07:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:13,621 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-07-09 18:07:13,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-07-09 18:07:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:13,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:13,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:13,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:13,829 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -264248193, now seen corresponding path program 70 times [2021-07-09 18:07:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:13,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587251634] [2021-07-09 18:07:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:14,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:14,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587251634] [2021-07-09 18:07:14,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587251634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471819275] [2021-07-09 18:07:14,088 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 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 [2021-07-09 18:07:14,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:14,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:14,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471819275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:14,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:14,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400938216] [2021-07-09 18:07:14,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:14,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:14,504 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:15,493 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-07-09 18:07:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:07:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:15,494 INFO L225 Difference]: With dead ends: 781 [2021-07-09 18:07:15,494 INFO L226 Difference]: Without dead ends: 685 [2021-07-09 18:07:15,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1127.1ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:07:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-09 18:07:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-07-09 18:07:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-07-09 18:07:15,500 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-07-09 18:07:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:15,500 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-07-09 18:07:15,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-07-09 18:07:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:15,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:15,501 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:15,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:07:15,701 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374397, now seen corresponding path program 71 times [2021-07-09 18:07:15,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:15,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414711147] [2021-07-09 18:07:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:15,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:15,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414711147] [2021-07-09 18:07:15,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414711147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:15,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789658920] [2021-07-09 18:07:15,942 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 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 [2021-07-09 18:07:15,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:07:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:16,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:16,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:16,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:16,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:16,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789658920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:16,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:16,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044586408] [2021-07-09 18:07:16,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:16,361 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:18,064 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-07-09 18:07:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:07:18,064 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:18,065 INFO L225 Difference]: With dead ends: 862 [2021-07-09 18:07:18,065 INFO L226 Difference]: Without dead ends: 760 [2021-07-09 18:07:18,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1517.4ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:07:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-09 18:07:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-07-09 18:07:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-07-09 18:07:18,072 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-07-09 18:07:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:18,072 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-07-09 18:07:18,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-07-09 18:07:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:18,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:18,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:18,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:18,273 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash 480263807, now seen corresponding path program 72 times [2021-07-09 18:07:18,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:18,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946260166] [2021-07-09 18:07:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:18,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946260166] [2021-07-09 18:07:18,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946260166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125677787] [2021-07-09 18:07:18,514 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 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 [2021-07-09 18:07:18,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:07:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:18,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:18,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:18,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:18,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125677787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:18,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:18,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:18,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357523608] [2021-07-09 18:07:18,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:18,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:18,898 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:21,118 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-07-09 18:07:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:07:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:21,119 INFO L225 Difference]: With dead ends: 971 [2021-07-09 18:07:21,119 INFO L226 Difference]: Without dead ends: 884 [2021-07-09 18:07:21,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1899.9ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:07:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-09 18:07:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-07-09 18:07:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-07-09 18:07:21,126 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-07-09 18:07:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:21,126 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-07-09 18:07:21,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-07-09 18:07:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:21,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:21,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:21,328 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1906506173, now seen corresponding path program 73 times [2021-07-09 18:07:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:21,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658139056] [2021-07-09 18:07:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:21,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:21,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658139056] [2021-07-09 18:07:21,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658139056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:21,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701247547] [2021-07-09 18:07:21,580 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 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 [2021-07-09 18:07:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:21,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:21,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:21,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:21,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:21,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:21,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701247547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:21,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:21,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067121399] [2021-07-09 18:07:21,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:21,977 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:24,822 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-07-09 18:07:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:07:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:24,823 INFO L225 Difference]: With dead ends: 1084 [2021-07-09 18:07:24,823 INFO L226 Difference]: Without dead ends: 1005 [2021-07-09 18:07:24,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2333.4ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:07:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-09 18:07:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-07-09 18:07:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-07-09 18:07:24,831 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-07-09 18:07:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:24,831 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-07-09 18:07:24,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-07-09 18:07:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:24,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:24,832 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:25,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:25,032 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash 991873427, now seen corresponding path program 74 times [2021-07-09 18:07:25,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:25,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378290798] [2021-07-09 18:07:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:25,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378290798] [2021-07-09 18:07:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378290798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084323108] [2021-07-09 18:07:25,281 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:07:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:25,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:25,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:25,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:25,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:25,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-09 18:07:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:25,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084323108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:25,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:25,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:25,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958749286] [2021-07-09 18:07:25,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:25,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:25,751 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:27,166 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-07-09 18:07:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:07:27,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:27,167 INFO L225 Difference]: With dead ends: 858 [2021-07-09 18:07:27,167 INFO L226 Difference]: Without dead ends: 799 [2021-07-09 18:07:27,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1410.2ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:07:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-07-09 18:07:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-07-09 18:07:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-07-09 18:07:27,174 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-07-09 18:07:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:27,174 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-07-09 18:07:27,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-07-09 18:07:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:27,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:27,175 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:27,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:27,375 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash 995289705, now seen corresponding path program 75 times [2021-07-09 18:07:27,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:27,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757906606] [2021-07-09 18:07:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:27,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757906606] [2021-07-09 18:07:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757906606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:27,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113712286] [2021-07-09 18:07:27,646 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 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 [2021-07-09 18:07:27,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:07:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:27,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:27,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:27,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:27,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:27,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:27,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:28,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113712286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:28,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:28,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876877475] [2021-07-09 18:07:28,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:28,093 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:30,301 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-07-09 18:07:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:07:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:30,302 INFO L225 Difference]: With dead ends: 923 [2021-07-09 18:07:30,302 INFO L226 Difference]: Without dead ends: 835 [2021-07-09 18:07:30,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 1959.8ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:07:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-09 18:07:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-07-09 18:07:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-07-09 18:07:30,309 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-07-09 18:07:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:30,309 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-07-09 18:07:30,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-07-09 18:07:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:30,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:30,310 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:30,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:30,525 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 354179115, now seen corresponding path program 76 times [2021-07-09 18:07:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:30,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393545278] [2021-07-09 18:07:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:30,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393545278] [2021-07-09 18:07:30,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393545278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475218090] [2021-07-09 18:07:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:30,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:30,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:31,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:31,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:31,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:31,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:31,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:31,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475218090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:31,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:31,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:31,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113975286] [2021-07-09 18:07:31,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:31,189 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:33,476 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-07-09 18:07:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:07:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:33,478 INFO L225 Difference]: With dead ends: 1025 [2021-07-09 18:07:33,478 INFO L226 Difference]: Without dead ends: 945 [2021-07-09 18:07:33,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2040.4ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:07:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-09 18:07:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-07-09 18:07:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-07-09 18:07:33,502 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-07-09 18:07:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:33,502 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-07-09 18:07:33,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-07-09 18:07:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:33,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:33,503 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:33,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:33,704 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:33,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1780421481, now seen corresponding path program 77 times [2021-07-09 18:07:33,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:33,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654624906] [2021-07-09 18:07:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:33,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:33,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654624906] [2021-07-09 18:07:33,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654624906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:33,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214085057] [2021-07-09 18:07:33,973 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 [2021-07-09 18:07:33,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:07:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:33,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:34,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:34,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:34,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:34,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:34,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:34,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214085057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:34,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:34,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:34,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386063366] [2021-07-09 18:07:34,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:34,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:34,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:34,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:34,371 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:36,930 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-07-09 18:07:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:07:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:36,931 INFO L225 Difference]: With dead ends: 999 [2021-07-09 18:07:36,931 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 18:07:36,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2194.9ms TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:07:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 18:07:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-07-09 18:07:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-07-09 18:07:36,939 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-07-09 18:07:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:36,939 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-07-09 18:07:36,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-07-09 18:07:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:36,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:36,940 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:37,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:37,149 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1675574863, now seen corresponding path program 78 times [2021-07-09 18:07:37,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:37,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454371830] [2021-07-09 18:07:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:37,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454371830] [2021-07-09 18:07:37,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454371830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:37,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133349673] [2021-07-09 18:07:37,408 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 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 [2021-07-09 18:07:37,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:07:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:37,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:37,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:37,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:37,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:37,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:37,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:37,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-09 18:07:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:37,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133349673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:37,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:37,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123533451] [2021-07-09 18:07:37,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:37,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:37,790 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:39,380 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-07-09 18:07:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:07:39,380 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:39,381 INFO L225 Difference]: With dead ends: 987 [2021-07-09 18:07:39,381 INFO L226 Difference]: Without dead ends: 931 [2021-07-09 18:07:39,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1473.4ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:07:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-07-09 18:07:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-07-09 18:07:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-07-09 18:07:39,389 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-07-09 18:07:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:39,389 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-07-09 18:07:39,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-07-09 18:07:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:39,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:39,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:39,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:07:39,591 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1261063915, now seen corresponding path program 79 times [2021-07-09 18:07:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:39,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182546666] [2021-07-09 18:07:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:39,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:39,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182546666] [2021-07-09 18:07:39,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182546666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:39,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373870077] [2021-07-09 18:07:39,840 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 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 [2021-07-09 18:07:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:40,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:40,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:40,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:40,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:40,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:40,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:40,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373870077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:40,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:40,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:40,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832637366] [2021-07-09 18:07:40,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:40,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:40,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:40,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:40,250 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:41,253 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-07-09 18:07:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:07:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:41,255 INFO L225 Difference]: With dead ends: 1026 [2021-07-09 18:07:41,255 INFO L226 Difference]: Without dead ends: 930 [2021-07-09 18:07:41,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1081.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:07:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-09 18:07:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-07-09 18:07:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-07-09 18:07:41,263 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-07-09 18:07:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:41,263 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-07-09 18:07:41,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-07-09 18:07:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:41,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:41,264 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:41,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:41,479 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash 124558675, now seen corresponding path program 80 times [2021-07-09 18:07:41,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:41,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723035344] [2021-07-09 18:07:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:41,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723035344] [2021-07-09 18:07:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723035344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:41,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409046609] [2021-07-09 18:07:41,723 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 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 [2021-07-09 18:07:41,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:42,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:42,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:42,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409046609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:42,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:42,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:42,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450587402] [2021-07-09 18:07:42,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:42,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:42,128 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:43,271 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-07-09 18:07:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:07:43,271 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:43,272 INFO L225 Difference]: With dead ends: 1041 [2021-07-09 18:07:43,272 INFO L226 Difference]: Without dead ends: 953 [2021-07-09 18:07:43,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:07:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-09 18:07:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-07-09 18:07:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 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) [2021-07-09 18:07:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-07-09 18:07:43,280 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-07-09 18:07:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:43,280 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-07-09 18:07:43,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-07-09 18:07:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:43,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:43,281 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:43,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:07:43,482 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:43,482 INFO L82 PathProgramCache]: Analyzing trace with hash -516551915, now seen corresponding path program 81 times [2021-07-09 18:07:43,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:43,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244604867] [2021-07-09 18:07:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:43,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:43,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244604867] [2021-07-09 18:07:43,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244604867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:43,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922183088] [2021-07-09 18:07:43,726 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 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 [2021-07-09 18:07:43,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:07:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:43,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:43,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:43,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:43,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:44,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922183088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:44,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:44,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890170290] [2021-07-09 18:07:44,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:44,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:44,112 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:45,674 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-07-09 18:07:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:07:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:45,676 INFO L225 Difference]: With dead ends: 1128 [2021-07-09 18:07:45,676 INFO L226 Difference]: Without dead ends: 1032 [2021-07-09 18:07:45,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1494.3ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:07:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-07-09 18:07:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-07-09 18:07:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-07-09 18:07:45,684 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-07-09 18:07:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:45,685 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-07-09 18:07:45,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-07-09 18:07:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:45,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:45,686 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:45,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:45,902 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash 909690451, now seen corresponding path program 82 times [2021-07-09 18:07:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:45,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548945983] [2021-07-09 18:07:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:46,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548945983] [2021-07-09 18:07:46,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548945983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:46,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633974125] [2021-07-09 18:07:46,146 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 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 [2021-07-09 18:07:46,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:46,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:46,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:46,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:46,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:46,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:46,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:46,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633974125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:46,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:46,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-09 18:07:46,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12826141] [2021-07-09 18:07:46,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:46,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:46,525 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:48,719 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-07-09 18:07:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:07:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:48,721 INFO L225 Difference]: With dead ends: 1294 [2021-07-09 18:07:48,721 INFO L226 Difference]: Without dead ends: 1216 [2021-07-09 18:07:48,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1891.4ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:07:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-07-09 18:07:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-07-09 18:07:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-07-09 18:07:48,730 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-07-09 18:07:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:48,730 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-07-09 18:07:48,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-07-09 18:07:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:48,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:48,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:48,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:48,933 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash -4942295, now seen corresponding path program 83 times [2021-07-09 18:07:48,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:48,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253033801] [2021-07-09 18:07:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:49,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:49,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253033801] [2021-07-09 18:07:49,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253033801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:49,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114151465] [2021-07-09 18:07:49,197 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 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 [2021-07-09 18:07:49,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:07:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:49,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:49,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:49,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:49,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:49,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-09 18:07:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:49,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114151465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:49,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:49,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-09 18:07:49,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099062572] [2021-07-09 18:07:49,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:07:49,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:07:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:07:49,628 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:51,252 INFO L93 Difference]: Finished difference Result 1073 states and 2135 transitions. [2021-07-09 18:07:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:07:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:51,254 INFO L225 Difference]: With dead ends: 1073 [2021-07-09 18:07:51,254 INFO L226 Difference]: Without dead ends: 995 [2021-07-09 18:07:51,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1611.1ms TimeCoverageRelationStatistics Valid=533, Invalid=5017, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:07:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-09 18:07:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 862. [2021-07-09 18:07:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-07-09 18:07:51,266 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-07-09 18:07:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:51,266 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-07-09 18:07:51,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-07-09 18:07:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:51,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:51,268 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:51,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:51,468 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash 491236367, now seen corresponding path program 84 times [2021-07-09 18:07:51,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:51,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823042745] [2021-07-09 18:07:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:51,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:51,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823042745] [2021-07-09 18:07:51,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823042745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:51,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525492642] [2021-07-09 18:07:51,708 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 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 [2021-07-09 18:07:51,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:07:51,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:52,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:52,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:52,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:52,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:52,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:52,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:52,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-09 18:07:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525492642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:52,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:52,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-09 18:07:52,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827427867] [2021-07-09 18:07:52,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:07:52,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:07:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:07:52,162 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:53,335 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-07-09 18:07:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:07:53,336 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:53,337 INFO L225 Difference]: With dead ends: 1056 [2021-07-09 18:07:53,337 INFO L226 Difference]: Without dead ends: 968 [2021-07-09 18:07:53,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1124.1ms TimeCoverageRelationStatistics Valid=305, Invalid=2887, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:07:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-07-09 18:07:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-07-09 18:07:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-07-09 18:07:53,346 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-07-09 18:07:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-07-09 18:07:53,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-07-09 18:07:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:53,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:53,348 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:53,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:53,564 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -149874223, now seen corresponding path program 85 times [2021-07-09 18:07:53,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:53,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475246431] [2021-07-09 18:07:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:53,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:53,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475246431] [2021-07-09 18:07:53,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475246431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:53,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758401597] [2021-07-09 18:07:53,800 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:53,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:54,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:54,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:54,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:54,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:54,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758401597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:54,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:54,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-07-09 18:07:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018159104] [2021-07-09 18:07:54,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:54,167 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:55,579 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-07-09 18:07:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:07:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:55,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:55,581 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:07:55,581 INFO L226 Difference]: Without dead ends: 1006 [2021-07-09 18:07:55,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1392.9ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:07:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-07-09 18:07:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-07-09 18:07:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-07-09 18:07:55,590 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-07-09 18:07:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:55,590 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-07-09 18:07:55,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-07-09 18:07:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:55,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:55,592 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:55,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:55,805 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1276368143, now seen corresponding path program 86 times [2021-07-09 18:07:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:55,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223773285] [2021-07-09 18:07:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:56,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223773285] [2021-07-09 18:07:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223773285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911731682] [2021-07-09 18:07:56,052 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 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 [2021-07-09 18:07:56,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:56,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:56,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:56,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:07:56,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:56,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:07:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:56,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911731682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:56,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:56,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-07-09 18:07:56,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902843806] [2021-07-09 18:07:56,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:56,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:56,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:56,420 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:58,305 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-07-09 18:07:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:07:58,305 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:58,306 INFO L225 Difference]: With dead ends: 1116 [2021-07-09 18:07:58,306 INFO L226 Difference]: Without dead ends: 1054 [2021-07-09 18:07:58,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1657.5ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:07:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-07-09 18:07:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-07-09 18:07:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-07-09 18:07:58,314 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-07-09 18:07:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:58,315 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-07-09 18:07:58,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-07-09 18:07:58,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:58,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:58,316 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:58,516 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1501435129, now seen corresponding path program 87 times [2021-07-09 18:07:58,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:58,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807823095] [2021-07-09 18:07:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807823095] [2021-07-09 18:07:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807823095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368357331] [2021-07-09 18:07:58,768 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 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 [2021-07-09 18:07:58,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:07:58,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:59,043 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:59,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:59,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:59,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:59,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:07:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:59,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368357331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:59,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:07:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325022506] [2021-07-09 18:07:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:07:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:07:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:07:59,152 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:59,938 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-07-09 18:07:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:07:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:07:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:59,940 INFO L225 Difference]: With dead ends: 1029 [2021-07-09 18:07:59,940 INFO L226 Difference]: Without dead ends: 981 [2021-07-09 18:07:59,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 865.8ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:07:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-07-09 18:07:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-07-09 18:07:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-07-09 18:07:59,948 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-07-09 18:07:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:59,948 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-07-09 18:07:59,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-07-09 18:07:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:07:59,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:59,950 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:00,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 18:08:00,150 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash -222063415, now seen corresponding path program 88 times [2021-07-09 18:08:00,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:00,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264066042] [2021-07-09 18:08:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:00,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:00,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264066042] [2021-07-09 18:08:00,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264066042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:00,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19118072] [2021-07-09 18:08:00,393 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 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 [2021-07-09 18:08:00,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:00,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:00,691 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:00,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:00,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:00,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:00,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19118072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:00,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:00,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:00,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209840786] [2021-07-09 18:08:00,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:00,800 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:01,751 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-07-09 18:08:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:08:01,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:01,752 INFO L225 Difference]: With dead ends: 1066 [2021-07-09 18:08:01,752 INFO L226 Difference]: Without dead ends: 1018 [2021-07-09 18:08:01,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:08:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-07-09 18:08:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-07-09 18:08:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-07-09 18:08:01,761 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-07-09 18:08:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:01,761 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-07-09 18:08:01,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-07-09 18:08:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:01,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:01,763 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:01,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:01,963 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1163559175, now seen corresponding path program 89 times [2021-07-09 18:08:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243136665] [2021-07-09 18:08:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:02,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:02,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243136665] [2021-07-09 18:08:02,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243136665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:02,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408380199] [2021-07-09 18:08:02,184 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 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 [2021-07-09 18:08:02,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:08:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:02,443 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:02,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:02,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:02,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:02,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:02,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:02,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408380199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:02,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:02,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-09 18:08:02,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258787881] [2021-07-09 18:08:02,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:08:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:02,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:08:02,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:08:02,597 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:03,742 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-07-09 18:08:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:08:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:03,743 INFO L225 Difference]: With dead ends: 1104 [2021-07-09 18:08:03,743 INFO L226 Difference]: Without dead ends: 1056 [2021-07-09 18:08:03,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 976.4ms TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:08:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-09 18:08:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-07-09 18:08:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-07-09 18:08:03,751 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-07-09 18:08:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:03,752 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-07-09 18:08:03,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-07-09 18:08:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:03,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:03,753 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:03,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 18:08:03,957 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash 522448585, now seen corresponding path program 90 times [2021-07-09 18:08:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:03,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157595147] [2021-07-09 18:08:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:04,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157595147] [2021-07-09 18:08:04,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157595147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311481791] [2021-07-09 18:08:04,168 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 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 [2021-07-09 18:08:04,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:08:04,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:04,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:04,400 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:04,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:04,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:04,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:04,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:04,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311481791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:04,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065694078] [2021-07-09 18:08:04,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:04,532 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:05,571 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-07-09 18:08:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:08:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:05,573 INFO L225 Difference]: With dead ends: 1137 [2021-07-09 18:08:05,573 INFO L226 Difference]: Without dead ends: 1105 [2021-07-09 18:08:05,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 962.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:08:05,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-07-09 18:08:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-07-09 18:08:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-07-09 18:08:05,581 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-07-09 18:08:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:05,582 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-07-09 18:08:05,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-07-09 18:08:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:05,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:05,583 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:05,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:05,786 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:05,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1948690951, now seen corresponding path program 91 times [2021-07-09 18:08:05,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:05,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779775950] [2021-07-09 18:08:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:06,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:06,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779775950] [2021-07-09 18:08:06,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779775950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:06,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749976228] [2021-07-09 18:08:06,005 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 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 [2021-07-09 18:08:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:06,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:06,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:06,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:06,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:06,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:06,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749976228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:06,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:06,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:06,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930741069] [2021-07-09 18:08:06,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:06,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:06,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:06,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:06,369 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:07,797 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-07-09 18:08:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:08:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:07,799 INFO L225 Difference]: With dead ends: 1204 [2021-07-09 18:08:07,799 INFO L226 Difference]: Without dead ends: 1160 [2021-07-09 18:08:07,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1135.2ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:08:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-07-09 18:08:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-07-09 18:08:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-07-09 18:08:07,808 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-07-09 18:08:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:07,808 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-07-09 18:08:07,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-07-09 18:08:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:07,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:07,810 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:08,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:08:08,021 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1310975239, now seen corresponding path program 92 times [2021-07-09 18:08:08,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:08,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575435484] [2021-07-09 18:08:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:08,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:08,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575435484] [2021-07-09 18:08:08,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575435484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:08,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185184363] [2021-07-09 18:08:08,252 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 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 [2021-07-09 18:08:08,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:08,461 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:08,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:08,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:08,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:08,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:08,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:08:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185184363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:08,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:08,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:08,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639828161] [2021-07-09 18:08:08,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:08,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:08,627 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:09,409 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-07-09 18:08:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:08:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:09,410 INFO L225 Difference]: With dead ends: 1027 [2021-07-09 18:08:09,411 INFO L226 Difference]: Without dead ends: 999 [2021-07-09 18:08:09,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 863.3ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:08:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-09 18:08:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-07-09 18:08:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-07-09 18:08:09,422 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-07-09 18:08:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:09,422 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-07-09 18:08:09,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-07-09 18:08:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:09,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:09,424 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:09,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:08:09,624 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -507368251, now seen corresponding path program 93 times [2021-07-09 18:08:09,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:09,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056825665] [2021-07-09 18:08:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:09,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056825665] [2021-07-09 18:08:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056825665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:09,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051547637] [2021-07-09 18:08:09,853 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 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 [2021-07-09 18:08:09,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:08:09,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:10,116 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:10,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:10,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:10,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:10,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:10,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051547637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:10,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:10,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:10,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269698805] [2021-07-09 18:08:10,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:10,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:10,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:10,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:10,222 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:11,329 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-07-09 18:08:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:08:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:11,331 INFO L225 Difference]: With dead ends: 1070 [2021-07-09 18:08:11,331 INFO L226 Difference]: Without dead ends: 974 [2021-07-09 18:08:11,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1084.2ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:08:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-07-09 18:08:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-07-09 18:08:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-07-09 18:08:11,339 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-07-09 18:08:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:11,339 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-07-09 18:08:11,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-07-09 18:08:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:11,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:11,340 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:08:11,544 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:11,544 INFO L82 PathProgramCache]: Analyzing trace with hash 878254339, now seen corresponding path program 94 times [2021-07-09 18:08:11,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:11,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576099511] [2021-07-09 18:08:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:11,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576099511] [2021-07-09 18:08:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576099511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55096633] [2021-07-09 18:08:11,765 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 [2021-07-09 18:08:11,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:12,031 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:12,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:12,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:12,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:12,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55096633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:12,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:12,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371191860] [2021-07-09 18:08:12,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:12,136 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:13,674 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-07-09 18:08:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:08:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:13,676 INFO L225 Difference]: With dead ends: 1128 [2021-07-09 18:08:13,676 INFO L226 Difference]: Without dead ends: 1033 [2021-07-09 18:08:13,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1325.6ms TimeCoverageRelationStatistics Valid=383, Invalid=3907, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:08:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-07-09 18:08:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-07-09 18:08:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-07-09 18:08:13,685 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-07-09 18:08:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:13,685 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-07-09 18:08:13,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-07-09 18:08:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:13,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:13,686 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:13,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:13,889 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:13,889 INFO L82 PathProgramCache]: Analyzing trace with hash 237143749, now seen corresponding path program 95 times [2021-07-09 18:08:13,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:13,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478818511] [2021-07-09 18:08:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:14,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478818511] [2021-07-09 18:08:14,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478818511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516503671] [2021-07-09 18:08:14,113 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 [2021-07-09 18:08:14,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:08:14,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:14,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:08:14,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:14,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:14,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:08:14,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:14,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:14,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:14,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-09 18:08:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516503671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:14,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:14,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-09 18:08:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482625872] [2021-07-09 18:08:14,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:08:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:08:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:08:14,575 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:16,743 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-07-09 18:08:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:08:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:16,745 INFO L225 Difference]: With dead ends: 1153 [2021-07-09 18:08:16,745 INFO L226 Difference]: Without dead ends: 1073 [2021-07-09 18:08:16,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1789.5ms TimeCoverageRelationStatistics Valid=582, Invalid=5270, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:08:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-07-09 18:08:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-07-09 18:08:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-07-09 18:08:16,754 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-07-09 18:08:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:16,754 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-07-09 18:08:16,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-07-09 18:08:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:16,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:16,755 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:16,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:08:16,956 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386115, now seen corresponding path program 96 times [2021-07-09 18:08:16,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:16,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087299113] [2021-07-09 18:08:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:17,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087299113] [2021-07-09 18:08:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087299113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002568200] [2021-07-09 18:08:17,190 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 [2021-07-09 18:08:17,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:08:17,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:17,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:17,420 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:17,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:17,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:17,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:17,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:17,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002568200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:17,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:17,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:17,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065424498] [2021-07-09 18:08:17,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:17,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:17,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:17,550 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:19,487 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-07-09 18:08:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:08:19,487 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:19,488 INFO L225 Difference]: With dead ends: 1223 [2021-07-09 18:08:19,488 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 18:08:19,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1588.9ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:08:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 18:08:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-07-09 18:08:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-07-09 18:08:19,497 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-07-09 18:08:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:19,497 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-07-09 18:08:19,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-07-09 18:08:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:19,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:19,498 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:19,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:19,699 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash 748753369, now seen corresponding path program 97 times [2021-07-09 18:08:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620441546] [2021-07-09 18:08:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:19,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:19,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620441546] [2021-07-09 18:08:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620441546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:19,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138430342] [2021-07-09 18:08:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:08:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:20,133 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:20,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:20,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:20,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:20,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:20,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:08:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:20,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138430342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:20,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:20,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:20,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736981121] [2021-07-09 18:08:20,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:20,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:20,294 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:21,739 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-07-09 18:08:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:08:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:21,741 INFO L225 Difference]: With dead ends: 1093 [2021-07-09 18:08:21,741 INFO L226 Difference]: Without dead ends: 1034 [2021-07-09 18:08:21,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1356.1ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:08:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-09 18:08:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-07-09 18:08:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-07-09 18:08:21,749 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-07-09 18:08:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-07-09 18:08:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-07-09 18:08:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:21,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:21,750 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:21,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:08:21,951 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash -834683145, now seen corresponding path program 98 times [2021-07-09 18:08:21,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:21,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543331682] [2021-07-09 18:08:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:22,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:22,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543331682] [2021-07-09 18:08:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543331682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:22,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197611282] [2021-07-09 18:08:22,190 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 [2021-07-09 18:08:22,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:22,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:22,448 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:22,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:22,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:22,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:22,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:22,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197611282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:22,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:22,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:22,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702759851] [2021-07-09 18:08:22,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:22,554 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:23,734 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-07-09 18:08:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:08:23,735 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:23,736 INFO L225 Difference]: With dead ends: 1156 [2021-07-09 18:08:23,736 INFO L226 Difference]: Without dead ends: 1060 [2021-07-09 18:08:23,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1053.4ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:08:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-07-09 18:08:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-07-09 18:08:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-07-09 18:08:23,744 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-07-09 18:08:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:23,744 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-07-09 18:08:23,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-07-09 18:08:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:23,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:23,745 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:23,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:23,946 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash 550939445, now seen corresponding path program 99 times [2021-07-09 18:08:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:23,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389462092] [2021-07-09 18:08:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:24,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:24,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389462092] [2021-07-09 18:08:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389462092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:24,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048769831] [2021-07-09 18:08:24,207 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) [2021-07-09 18:08:24,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:08:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:24,476 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:24,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:24,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:24,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:24,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048769831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:24,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:24,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:24,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446946520] [2021-07-09 18:08:24,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:24,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:24,579 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:26,221 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-07-09 18:08:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:08:26,221 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:26,222 INFO L225 Difference]: With dead ends: 1272 [2021-07-09 18:08:26,222 INFO L226 Difference]: Without dead ends: 1170 [2021-07-09 18:08:26,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1530.9ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:08:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-09 18:08:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-07-09 18:08:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-07-09 18:08:26,232 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-07-09 18:08:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:26,232 INFO L482 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-07-09 18:08:26,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-07-09 18:08:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:26,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:26,233 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:26,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:26,433 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -90171145, now seen corresponding path program 100 times [2021-07-09 18:08:26,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:26,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788685939] [2021-07-09 18:08:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:26,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788685939] [2021-07-09 18:08:26,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788685939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:26,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270851412] [2021-07-09 18:08:26,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:08:26,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:26,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:26,896 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:26,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:26,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:26,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:26,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:27,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270851412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:27,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:27,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:27,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921014190] [2021-07-09 18:08:27,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:27,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:27,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:27,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:27,021 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:29,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:29,217 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-07-09 18:08:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:08:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:29,219 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 18:08:29,219 INFO L226 Difference]: Without dead ends: 1321 [2021-07-09 18:08:29,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1971.3ms TimeCoverageRelationStatistics Valid=758, Invalid=7074, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:08:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-07-09 18:08:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-07-09 18:08:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-07-09 18:08:29,229 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-07-09 18:08:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:29,229 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-07-09 18:08:29,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-07-09 18:08:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:29,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:29,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:29,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-09 18:08:29,430 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:29,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:29,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1336071221, now seen corresponding path program 101 times [2021-07-09 18:08:29,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:29,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612809263] [2021-07-09 18:08:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:29,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612809263] [2021-07-09 18:08:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612809263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988822983] [2021-07-09 18:08:29,663 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 [2021-07-09 18:08:29,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:08:29,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:29,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:29,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:29,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:29,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:29,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:29,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:30,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988822983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:30,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:30,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965075387] [2021-07-09 18:08:30,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:30,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:30,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:30,012 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:32,724 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-07-09 18:08:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:08:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:32,726 INFO L225 Difference]: With dead ends: 1535 [2021-07-09 18:08:32,726 INFO L226 Difference]: Without dead ends: 1473 [2021-07-09 18:08:32,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2103.7ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:08:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-07-09 18:08:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-07-09 18:08:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-07-09 18:08:32,737 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-07-09 18:08:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:32,737 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-07-09 18:08:32,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-07-09 18:08:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:32,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:32,738 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:32,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:32,941 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 421438475, now seen corresponding path program 102 times [2021-07-09 18:08:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:32,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978396076] [2021-07-09 18:08:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:33,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978396076] [2021-07-09 18:08:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978396076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:33,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955713246] [2021-07-09 18:08:33,173 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 [2021-07-09 18:08:33,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:08:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:33,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:33,374 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:33,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:33,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:33,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:33,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:08:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955713246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:33,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:33,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66962355] [2021-07-09 18:08:33,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:33,534 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:34,998 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-07-09 18:08:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:08:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:35,000 INFO L225 Difference]: With dead ends: 1427 [2021-07-09 18:08:35,000 INFO L226 Difference]: Without dead ends: 1371 [2021-07-09 18:08:35,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1331.7ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:08:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-07-09 18:08:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-07-09 18:08:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-07-09 18:08:35,011 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-07-09 18:08:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:35,011 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-07-09 18:08:35,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-07-09 18:08:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:35,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:35,012 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:35,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:35,213 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:35,213 INFO L82 PathProgramCache]: Analyzing trace with hash 424854753, now seen corresponding path program 103 times [2021-07-09 18:08:35,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:35,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342387204] [2021-07-09 18:08:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342387204] [2021-07-09 18:08:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342387204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564256340] [2021-07-09 18:08:35,460 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 [2021-07-09 18:08:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:35,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:35,712 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:35,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:35,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:35,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:35,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:35,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564256340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:35,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:35,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015173571] [2021-07-09 18:08:35,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:35,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:35,818 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:37,789 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-07-09 18:08:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:08:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:37,791 INFO L225 Difference]: With dead ends: 1723 [2021-07-09 18:08:37,791 INFO L226 Difference]: Without dead ends: 1635 [2021-07-09 18:08:37,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1769.3ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:08:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-09 18:08:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-07-09 18:08:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-07-09 18:08:37,804 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-07-09 18:08:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:37,804 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-07-09 18:08:37,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-07-09 18:08:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:37,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:37,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:38,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:08:38,006 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:38,006 INFO L82 PathProgramCache]: Analyzing trace with hash -216255837, now seen corresponding path program 104 times [2021-07-09 18:08:38,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:38,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880308201] [2021-07-09 18:08:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:38,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880308201] [2021-07-09 18:08:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880308201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184683854] [2021-07-09 18:08:38,256 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 [2021-07-09 18:08:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:38,483 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:38,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:38,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:38,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:38,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:38,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:38,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184683854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:38,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:38,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:38,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186416788] [2021-07-09 18:08:38,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:38,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:38,609 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:40,920 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-07-09 18:08:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:08:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:40,922 INFO L225 Difference]: With dead ends: 1938 [2021-07-09 18:08:40,922 INFO L226 Difference]: Without dead ends: 1858 [2021-07-09 18:08:40,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1906.0ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:08:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-07-09 18:08:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-07-09 18:08:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-07-09 18:08:40,934 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-07-09 18:08:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-07-09 18:08:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-07-09 18:08:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:40,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:40,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:41,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:08:41,136 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1209986529, now seen corresponding path program 105 times [2021-07-09 18:08:41,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:41,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582775673] [2021-07-09 18:08:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:41,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582775673] [2021-07-09 18:08:41,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582775673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:41,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918969160] [2021-07-09 18:08:41,392 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 [2021-07-09 18:08:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:08:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:41,619 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:41,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:41,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:41,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:41,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918969160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:41,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:41,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:41,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087249727] [2021-07-09 18:08:41,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:41,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:41,751 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:44,264 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-07-09 18:08:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:08:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:44,267 INFO L225 Difference]: With dead ends: 1677 [2021-07-09 18:08:44,267 INFO L226 Difference]: Without dead ends: 1621 [2021-07-09 18:08:44,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 2085.9ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:08:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-07-09 18:08:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-07-09 18:08:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-07-09 18:08:44,279 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-07-09 18:08:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:44,279 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-07-09 18:08:44,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-07-09 18:08:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:44,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:44,280 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:44,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:08:44,480 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1105139911, now seen corresponding path program 106 times [2021-07-09 18:08:44,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:44,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107217868] [2021-07-09 18:08:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:44,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107217868] [2021-07-09 18:08:44,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107217868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649562710] [2021-07-09 18:08:44,734 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 [2021-07-09 18:08:44,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:44,934 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:44,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:44,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:44,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:44,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:44,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:08:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:45,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649562710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:45,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:45,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:45,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078373767] [2021-07-09 18:08:45,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:45,092 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:46,588 INFO L93 Difference]: Finished difference Result 1761 states and 3540 transitions. [2021-07-09 18:08:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:08:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:46,590 INFO L225 Difference]: With dead ends: 1761 [2021-07-09 18:08:46,590 INFO L226 Difference]: Without dead ends: 1705 [2021-07-09 18:08:46,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1417.3ms TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:08:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-09 18:08:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-07-09 18:08:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-07-09 18:08:46,604 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-07-09 18:08:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:46,604 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-07-09 18:08:46,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-07-09 18:08:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:46,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:46,605 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:46,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:46,806 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1831498867, now seen corresponding path program 107 times [2021-07-09 18:08:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:46,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279787918] [2021-07-09 18:08:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:47,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:47,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279787918] [2021-07-09 18:08:47,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279787918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:47,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311591478] [2021-07-09 18:08:47,047 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 [2021-07-09 18:08:47,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:08:47,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:47,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:47,305 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:47,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:47,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:47,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:47,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:47,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311591478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:47,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:47,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626208320] [2021-07-09 18:08:47,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:47,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:47,407 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:48,342 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-07-09 18:08:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:08:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:48,344 INFO L225 Difference]: With dead ends: 1677 [2021-07-09 18:08:48,344 INFO L226 Difference]: Without dead ends: 1581 [2021-07-09 18:08:48,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1036.1ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:08:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-07-09 18:08:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-07-09 18:08:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-07-09 18:08:48,357 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-07-09 18:08:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:48,357 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-07-09 18:08:48,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-07-09 18:08:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:48,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:48,358 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:48,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:08:48,559 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash -445876277, now seen corresponding path program 108 times [2021-07-09 18:08:48,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:48,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967327295] [2021-07-09 18:08:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:48,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967327295] [2021-07-09 18:08:48,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967327295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834935225] [2021-07-09 18:08:48,792 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 [2021-07-09 18:08:48,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:08:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:08:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:49,055 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:49,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:49,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:49,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:49,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:49,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834935225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:49,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:49,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077464045] [2021-07-09 18:08:49,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:49,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:49,156 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:50,203 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-07-09 18:08:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:08:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:50,205 INFO L225 Difference]: With dead ends: 1692 [2021-07-09 18:08:50,205 INFO L226 Difference]: Without dead ends: 1604 [2021-07-09 18:08:50,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1034.7ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:08:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-09 18:08:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-07-09 18:08:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-07-09 18:08:50,218 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-07-09 18:08:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:50,218 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-07-09 18:08:50,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-07-09 18:08:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:50,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:50,220 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:50,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:08:50,420 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:50,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:50,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1086986867, now seen corresponding path program 109 times [2021-07-09 18:08:50,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:50,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209292266] [2021-07-09 18:08:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:50,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209292266] [2021-07-09 18:08:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209292266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447666671] [2021-07-09 18:08:50,662 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) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:50,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:50,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:50,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:50,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:50,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:08:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:51,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447666671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:51,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:51,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:51,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854857578] [2021-07-09 18:08:51,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:51,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:51,033 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:52,586 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-07-09 18:08:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:08:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:52,588 INFO L225 Difference]: With dead ends: 1779 [2021-07-09 18:08:52,588 INFO L226 Difference]: Without dead ends: 1683 [2021-07-09 18:08:52,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1439.8ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:08:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-07-09 18:08:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-07-09 18:08:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-07-09 18:08:52,601 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-07-09 18:08:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:52,601 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-07-09 18:08:52,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-07-09 18:08:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:52,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:52,602 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:52,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:08:52,803 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 339255499, now seen corresponding path program 110 times [2021-07-09 18:08:52,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:52,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005282921] [2021-07-09 18:08:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:53,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:53,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005282921] [2021-07-09 18:08:53,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005282921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:53,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287748306] [2021-07-09 18:08:53,036 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 [2021-07-09 18:08:53,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:53,262 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:53,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:53,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:53,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:53,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:53,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287748306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:53,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:53,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:53,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479722378] [2021-07-09 18:08:53,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:53,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:53,391 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:55,536 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-07-09 18:08:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:08:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:55,539 INFO L225 Difference]: With dead ends: 1945 [2021-07-09 18:08:55,539 INFO L226 Difference]: Without dead ends: 1867 [2021-07-09 18:08:55,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1818.5ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:08:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-07-09 18:08:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-07-09 18:08:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-07-09 18:08:55,553 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-07-09 18:08:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:55,553 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-07-09 18:08:55,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-07-09 18:08:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:55,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:55,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:55,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:55,764 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:55,765 INFO L82 PathProgramCache]: Analyzing trace with hash -575377247, now seen corresponding path program 111 times [2021-07-09 18:08:55,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:55,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700570844] [2021-07-09 18:08:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:55,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700570844] [2021-07-09 18:08:55,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700570844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:55,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896748994] [2021-07-09 18:08:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:08:56,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:08:56,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:56,211 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:08:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:08:56,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:56,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:56,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:56,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:08:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:56,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896748994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:56,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:56,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:08:56,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527135874] [2021-07-09 18:08:56,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:08:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:08:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:08:56,386 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:58,023 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-07-09 18:08:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:08:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:08:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:58,025 INFO L225 Difference]: With dead ends: 1709 [2021-07-09 18:08:58,025 INFO L226 Difference]: Without dead ends: 1647 [2021-07-09 18:08:58,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1499.1ms TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:08:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-09 18:08:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-07-09 18:08:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-07-09 18:08:58,038 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-07-09 18:08:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:58,038 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-07-09 18:08:58,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-07-09 18:08:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:08:58,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:58,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:58,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:58,240 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -79198585, now seen corresponding path program 112 times [2021-07-09 18:08:58,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:58,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356336688] [2021-07-09 18:08:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:58,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356336688] [2021-07-09 18:08:58,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356336688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:58,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212614847] [2021-07-09 18:08:58,487 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 [2021-07-09 18:08:58,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:08:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:58,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:08:58,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:08:58,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:58,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:58,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:58,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:08:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:58,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212614847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:58,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:58,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:08:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960369089] [2021-07-09 18:08:58,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:08:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:08:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:08:58,839 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:00,128 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-07-09 18:09:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:09:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:00,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:00,130 INFO L225 Difference]: With dead ends: 1663 [2021-07-09 18:09:00,130 INFO L226 Difference]: Without dead ends: 1575 [2021-07-09 18:09:00,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1234.1ms TimeCoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:09:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-09 18:09:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-07-09 18:09:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-07-09 18:09:00,144 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-07-09 18:09:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:00,144 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-07-09 18:09:00,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-07-09 18:09:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:00,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:00,145 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:00,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:00,346 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:00,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash -720309175, now seen corresponding path program 113 times [2021-07-09 18:09:00,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:00,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672845450] [2021-07-09 18:09:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672845450] [2021-07-09 18:09:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672845450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627788792] [2021-07-09 18:09:00,571 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 [2021-07-09 18:09:00,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:00,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:00,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:00,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:09:00,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:00,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:00,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:00,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-09 18:09:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627788792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:00,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:09:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084692854] [2021-07-09 18:09:00,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:00,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:00,922 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:02,254 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-07-09 18:09:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:09:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:02,256 INFO L225 Difference]: With dead ends: 1683 [2021-07-09 18:09:02,256 INFO L226 Difference]: Without dead ends: 1611 [2021-07-09 18:09:02,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1294.6ms TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:09:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-07-09 18:09:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-07-09 18:09:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-07-09 18:09:02,270 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-07-09 18:09:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:02,270 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-07-09 18:09:02,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-07-09 18:09:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:02,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:02,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:02,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:09:02,472 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash 705933191, now seen corresponding path program 114 times [2021-07-09 18:09:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:02,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909077265] [2021-07-09 18:09:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:02,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909077265] [2021-07-09 18:09:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909077265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382287267] [2021-07-09 18:09:02,691 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 [2021-07-09 18:09:02,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:09:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:02,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:02,913 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:02,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:09:02,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:02,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:02,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:02,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-09 18:09:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:03,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382287267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:03,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:03,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:09:03,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138575426] [2021-07-09 18:09:03,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:03,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:03,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:03,031 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:04,603 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-07-09 18:09:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:09:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:04,606 INFO L225 Difference]: With dead ends: 1719 [2021-07-09 18:09:04,606 INFO L226 Difference]: Without dead ends: 1657 [2021-07-09 18:09:04,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1550.0ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:09:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-09 18:09:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-07-09 18:09:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-07-09 18:09:04,620 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-07-09 18:09:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:04,620 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-07-09 18:09:04,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-07-09 18:09:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:04,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:04,622 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:04,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:09:04,838 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:04,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583481, now seen corresponding path program 115 times [2021-07-09 18:09:04,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:04,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007631357] [2021-07-09 18:09:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:05,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007631357] [2021-07-09 18:09:05,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007631357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790954571] [2021-07-09 18:09:05,063 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 [2021-07-09 18:09:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:05,319 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:05,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:05,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:05,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:05,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:05,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:05,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790954571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:05,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:05,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:05,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074355658] [2021-07-09 18:09:05,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:05,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:05,438 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:06,361 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-07-09 18:09:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:06,363 INFO L225 Difference]: With dead ends: 1608 [2021-07-09 18:09:06,363 INFO L226 Difference]: Without dead ends: 1560 [2021-07-09 18:09:06,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 859.4ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:09:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-09 18:09:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-07-09 18:09:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-07-09 18:09:06,376 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-07-09 18:09:06,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:06,376 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-07-09 18:09:06,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-07-09 18:09:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:06,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:06,377 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:06,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:09:06,578 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:06,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash -492211767, now seen corresponding path program 116 times [2021-07-09 18:09:06,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:06,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313653229] [2021-07-09 18:09:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:06,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313653229] [2021-07-09 18:09:06,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313653229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637316085] [2021-07-09 18:09:06,791 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 [2021-07-09 18:09:06,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:07,050 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:07,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:07,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:07,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:07,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637316085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:07,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:07,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545255591] [2021-07-09 18:09:07,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:07,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:07,179 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:08,178 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-07-09 18:09:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:08,180 INFO L225 Difference]: With dead ends: 1645 [2021-07-09 18:09:08,180 INFO L226 Difference]: Without dead ends: 1597 [2021-07-09 18:09:08,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:09:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-07-09 18:09:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-07-09 18:09:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-07-09 18:09:08,193 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-07-09 18:09:08,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:08,193 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-07-09 18:09:08,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:08,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-07-09 18:09:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:08,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:08,194 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:08,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:08,396 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 893410823, now seen corresponding path program 117 times [2021-07-09 18:09:08,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:08,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985834318] [2021-07-09 18:09:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:08,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985834318] [2021-07-09 18:09:08,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985834318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820626975] [2021-07-09 18:09:08,612 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 [2021-07-09 18:09:08,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:09:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:08,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:08,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:08,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:08,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:08,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:08,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820626975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:08,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:08,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158708770] [2021-07-09 18:09:08,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:08,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:08,999 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:10,065 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-07-09 18:09:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:09:10,066 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:10,067 INFO L225 Difference]: With dead ends: 1683 [2021-07-09 18:09:10,067 INFO L226 Difference]: Without dead ends: 1635 [2021-07-09 18:09:10,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 958.2ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:09:10,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-09 18:09:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-07-09 18:09:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-07-09 18:09:10,081 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-07-09 18:09:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:10,081 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-07-09 18:09:10,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-07-09 18:09:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:10,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:10,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:10,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:09:10,283 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:10,283 INFO L82 PathProgramCache]: Analyzing trace with hash 252300233, now seen corresponding path program 118 times [2021-07-09 18:09:10,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:10,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019823483] [2021-07-09 18:09:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:10,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:10,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019823483] [2021-07-09 18:09:10,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019823483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300545066] [2021-07-09 18:09:10,508 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 [2021-07-09 18:09:10,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:10,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:10,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:10,748 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:10,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:10,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:10,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:10,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:10,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300545066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:10,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:10,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62011299] [2021-07-09 18:09:10,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:10,901 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:12,100 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-07-09 18:09:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:09:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:12,102 INFO L225 Difference]: With dead ends: 1716 [2021-07-09 18:09:12,102 INFO L226 Difference]: Without dead ends: 1684 [2021-07-09 18:09:12,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:09:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-07-09 18:09:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-07-09 18:09:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-07-09 18:09:12,116 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-07-09 18:09:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:12,116 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-07-09 18:09:12,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-07-09 18:09:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:12,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:12,117 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:12,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:12,318 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1678542599, now seen corresponding path program 119 times [2021-07-09 18:09:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:12,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181687117] [2021-07-09 18:09:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:12,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181687117] [2021-07-09 18:09:12,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181687117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564508581] [2021-07-09 18:09:12,545 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 [2021-07-09 18:09:12,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:12,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:12,770 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:12,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:12,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:12,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:12,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:12,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:12,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564508581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:12,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:12,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:12,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404283416] [2021-07-09 18:09:12,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:12,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:12,914 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:14,392 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-07-09 18:09:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:09:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:14,394 INFO L225 Difference]: With dead ends: 1787 [2021-07-09 18:09:14,394 INFO L226 Difference]: Without dead ends: 1743 [2021-07-09 18:09:14,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:09:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-07-09 18:09:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-07-09 18:09:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-07-09 18:09:14,413 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-07-09 18:09:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:14,414 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-07-09 18:09:14,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-07-09 18:09:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:14,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:14,415 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:14,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:14,631 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:14,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1040826887, now seen corresponding path program 120 times [2021-07-09 18:09:14,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:14,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051842336] [2021-07-09 18:09:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:14,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:14,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051842336] [2021-07-09 18:09:14,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051842336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:14,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018120523] [2021-07-09 18:09:14,844 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 [2021-07-09 18:09:14,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:09:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:14,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:15,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:15,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:15,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:15,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:15,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:15,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:15,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018120523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:15,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:15,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890917983] [2021-07-09 18:09:15,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:15,215 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:16,012 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-07-09 18:09:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:09:16,012 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:16,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:16,014 INFO L225 Difference]: With dead ends: 1606 [2021-07-09 18:09:16,014 INFO L226 Difference]: Without dead ends: 1578 [2021-07-09 18:09:16,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 880.2ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:09:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-07-09 18:09:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-07-09 18:09:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-07-09 18:09:16,027 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-07-09 18:09:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:16,027 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-07-09 18:09:16,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-07-09 18:09:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:16,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:16,028 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:16,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:09:16,229 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash -777516603, now seen corresponding path program 121 times [2021-07-09 18:09:16,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:16,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869496445] [2021-07-09 18:09:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:16,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869496445] [2021-07-09 18:09:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869496445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:16,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8540986] [2021-07-09 18:09:16,448 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 [2021-07-09 18:09:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:16,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:16,704 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:16,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:16,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:16,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:16,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8540986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482036041] [2021-07-09 18:09:16,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:16,833 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:17,981 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-07-09 18:09:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:09:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:17,983 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 18:09:17,983 INFO L226 Difference]: Without dead ends: 1554 [2021-07-09 18:09:17,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:09:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-07-09 18:09:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-07-09 18:09:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-07-09 18:09:17,996 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-07-09 18:09:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:17,996 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-07-09 18:09:17,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-07-09 18:09:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:17,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:17,998 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:18,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:09:18,199 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash 608105987, now seen corresponding path program 122 times [2021-07-09 18:09:18,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:18,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670309774] [2021-07-09 18:09:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:18,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670309774] [2021-07-09 18:09:18,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670309774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450727650] [2021-07-09 18:09:18,430 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 [2021-07-09 18:09:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:18,685 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:18,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:18,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:18,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:18,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:18,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:18,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450727650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:18,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:18,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:18,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48985215] [2021-07-09 18:09:18,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:18,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:18,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:18,802 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:20,490 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-07-09 18:09:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:09:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:20,492 INFO L225 Difference]: With dead ends: 1712 [2021-07-09 18:09:20,492 INFO L226 Difference]: Without dead ends: 1617 [2021-07-09 18:09:20,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1395.2ms TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:09:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-07-09 18:09:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-07-09 18:09:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-07-09 18:09:20,506 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-07-09 18:09:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:20,506 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-07-09 18:09:20,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-07-09 18:09:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:20,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:20,507 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:20,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:20,709 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash -33004603, now seen corresponding path program 123 times [2021-07-09 18:09:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:20,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775452761] [2021-07-09 18:09:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:20,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:20,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775452761] [2021-07-09 18:09:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775452761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650188452] [2021-07-09 18:09:20,936 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 [2021-07-09 18:09:20,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:09:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:21,175 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:21,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:21,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:21,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:21,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:21,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:21,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650188452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:21,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:21,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:21,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193030358] [2021-07-09 18:09:21,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:21,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:21,316 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:23,098 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-07-09 18:09:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:09:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:23,100 INFO L225 Difference]: With dead ends: 1736 [2021-07-09 18:09:23,100 INFO L226 Difference]: Without dead ends: 1656 [2021-07-09 18:09:23,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1591.3ms TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:09:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-07-09 18:09:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-07-09 18:09:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-07-09 18:09:23,116 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-07-09 18:09:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:23,116 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-07-09 18:09:23,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-07-09 18:09:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:23,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:23,118 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:23,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,333 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:23,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1393237763, now seen corresponding path program 124 times [2021-07-09 18:09:23,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:23,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086779077] [2021-07-09 18:09:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:23,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086779077] [2021-07-09 18:09:23,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086779077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202819040] [2021-07-09 18:09:23,565 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 [2021-07-09 18:09:23,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:23,794 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:23,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:23,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:23,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202819040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:23,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:23,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750539088] [2021-07-09 18:09:23,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:23,934 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:26,013 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-07-09 18:09:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:09:26,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:26,015 INFO L225 Difference]: With dead ends: 1806 [2021-07-09 18:09:26,015 INFO L226 Difference]: Without dead ends: 1747 [2021-07-09 18:09:26,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1674.7ms TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:09:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-09 18:09:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-07-09 18:09:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-07-09 18:09:26,029 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-07-09 18:09:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:26,029 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-07-09 18:09:26,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-07-09 18:09:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:26,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:26,031 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:26,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:26,246 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:26,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash 478605017, now seen corresponding path program 125 times [2021-07-09 18:09:26,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:26,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647231084] [2021-07-09 18:09:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647231084] [2021-07-09 18:09:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647231084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050021053] [2021-07-09 18:09:26,475 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 [2021-07-09 18:09:26,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:26,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:26,705 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:26,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:26,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:26,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:26,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:26,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:26,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050021053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:26,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:26,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:26,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386273508] [2021-07-09 18:09:26,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:26,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:26,872 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:28,381 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-07-09 18:09:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:09:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:28,383 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 18:09:28,383 INFO L226 Difference]: Without dead ends: 1619 [2021-07-09 18:09:28,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1391.5ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:09:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-07-09 18:09:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-07-09 18:09:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-07-09 18:09:28,396 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-07-09 18:09:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:28,396 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-07-09 18:09:28,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-07-09 18:09:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:28,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:28,398 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:28,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:09:28,605 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1104831497, now seen corresponding path program 126 times [2021-07-09 18:09:28,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:28,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034001086] [2021-07-09 18:09:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:28,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:28,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034001086] [2021-07-09 18:09:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034001086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:28,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250590095] [2021-07-09 18:09:28,840 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 [2021-07-09 18:09:28,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:09:28,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:29,120 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:29,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:29,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:29,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:29,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:29,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250590095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:29,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:29,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130083737] [2021-07-09 18:09:29,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:29,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:29,268 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:30,247 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-07-09 18:09:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:09:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:30,249 INFO L225 Difference]: With dead ends: 1719 [2021-07-09 18:09:30,249 INFO L226 Difference]: Without dead ends: 1623 [2021-07-09 18:09:30,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1117.1ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:09:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-09 18:09:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-07-09 18:09:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-07-09 18:09:30,263 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-07-09 18:09:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:30,263 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-07-09 18:09:30,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-07-09 18:09:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:30,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:30,264 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:30,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:30,469 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash 280791093, now seen corresponding path program 127 times [2021-07-09 18:09:30,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:30,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743809937] [2021-07-09 18:09:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:30,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:30,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743809937] [2021-07-09 18:09:30,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743809937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:30,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185235656] [2021-07-09 18:09:30,702 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) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:30,963 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:30,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:30,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:30,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:30,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:30,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:31,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185235656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:31,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:31,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:31,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379205950] [2021-07-09 18:09:31,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:31,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:31,083 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:33,010 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-07-09 18:09:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:09:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:33,012 INFO L225 Difference]: With dead ends: 1837 [2021-07-09 18:09:33,012 INFO L226 Difference]: Without dead ends: 1735 [2021-07-09 18:09:33,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1544.1ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:09:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-07-09 18:09:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-07-09 18:09:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-07-09 18:09:33,026 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-07-09 18:09:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:33,027 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-07-09 18:09:33,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-07-09 18:09:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:33,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:33,028 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:33,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:33,229 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash -360319497, now seen corresponding path program 128 times [2021-07-09 18:09:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441572379] [2021-07-09 18:09:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:33,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441572379] [2021-07-09 18:09:33,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441572379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590513855] [2021-07-09 18:09:33,456 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 [2021-07-09 18:09:33,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:33,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:33,682 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:33,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:33,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:33,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:33,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:33,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:33,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590513855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:33,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:33,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712863886] [2021-07-09 18:09:33,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:33,820 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:36,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:36,271 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-07-09 18:09:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:09:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:36,274 INFO L225 Difference]: With dead ends: 1994 [2021-07-09 18:09:36,274 INFO L226 Difference]: Without dead ends: 1895 [2021-07-09 18:09:36,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 2070.1ms TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:09:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-07-09 18:09:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-07-09 18:09:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-07-09 18:09:36,290 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-07-09 18:09:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:36,290 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-07-09 18:09:36,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-07-09 18:09:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:36,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:36,291 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:36,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:09:36,492 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:36,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1065922869, now seen corresponding path program 129 times [2021-07-09 18:09:36,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:36,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890967935] [2021-07-09 18:09:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:36,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:36,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890967935] [2021-07-09 18:09:36,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890967935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:36,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136117892] [2021-07-09 18:09:36,728 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 [2021-07-09 18:09:36,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:09:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:36,954 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:36,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:36,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:36,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:36,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:36,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:37,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136117892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:37,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:37,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143832287] [2021-07-09 18:09:37,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:37,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:37,094 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:39,831 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-07-09 18:09:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:09:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:39,834 INFO L225 Difference]: With dead ends: 2110 [2021-07-09 18:09:39,834 INFO L226 Difference]: Without dead ends: 2048 [2021-07-09 18:09:39,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 2206.2ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:09:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-09 18:09:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-07-09 18:09:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-07-09 18:09:39,850 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-07-09 18:09:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:39,850 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-07-09 18:09:39,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:39,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-07-09 18:09:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:39,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:39,852 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:40,053 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 151290123, now seen corresponding path program 130 times [2021-07-09 18:09:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219607433] [2021-07-09 18:09:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:40,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219607433] [2021-07-09 18:09:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219607433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284120786] [2021-07-09 18:09:40,303 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 [2021-07-09 18:09:40,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:40,505 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:40,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:40,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:40,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:40,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:40,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284120786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:40,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056895405] [2021-07-09 18:09:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:40,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:40,668 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:42,174 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-07-09 18:09:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:09:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:42,177 INFO L225 Difference]: With dead ends: 1992 [2021-07-09 18:09:42,177 INFO L226 Difference]: Without dead ends: 1936 [2021-07-09 18:09:42,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1386.3ms TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:09:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-09 18:09:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-07-09 18:09:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-07-09 18:09:42,193 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-07-09 18:09:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:42,193 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-07-09 18:09:42,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-07-09 18:09:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:42,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:42,195 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:42,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:42,411 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 154706401, now seen corresponding path program 131 times [2021-07-09 18:09:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:42,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952856366] [2021-07-09 18:09:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:42,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952856366] [2021-07-09 18:09:42,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952856366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:42,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208637875] [2021-07-09 18:09:42,656 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 [2021-07-09 18:09:42,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:42,908 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:42,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:42,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:42,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:42,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:42,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:43,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208637875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:43,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:43,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:43,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696281958] [2021-07-09 18:09:43,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:43,033 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:45,142 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-07-09 18:09:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:09:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:45,145 INFO L225 Difference]: With dead ends: 2256 [2021-07-09 18:09:45,145 INFO L226 Difference]: Without dead ends: 2168 [2021-07-09 18:09:45,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1849.2ms TimeCoverageRelationStatistics Valid=531, Invalid=5631, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:09:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-07-09 18:09:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-07-09 18:09:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-07-09 18:09:45,163 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-07-09 18:09:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:45,164 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-07-09 18:09:45,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-07-09 18:09:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:45,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:45,166 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:45,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 18:09:45,366 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash -486404189, now seen corresponding path program 132 times [2021-07-09 18:09:45,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:45,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058945355] [2021-07-09 18:09:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:45,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058945355] [2021-07-09 18:09:45,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058945355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951459024] [2021-07-09 18:09:45,610 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 [2021-07-09 18:09:45,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:09:45,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:45,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:09:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:45,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:45,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:45,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:45,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:45,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951459024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:45,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:45,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:45,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891981808] [2021-07-09 18:09:45,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:45,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:45,980 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:48,330 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-07-09 18:09:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:09:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:48,333 INFO L225 Difference]: With dead ends: 2485 [2021-07-09 18:09:48,333 INFO L226 Difference]: Without dead ends: 2405 [2021-07-09 18:09:48,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 2027.6ms TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:09:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-09 18:09:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-07-09 18:09:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-07-09 18:09:48,350 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-07-09 18:09:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:48,350 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-07-09 18:09:48,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-07-09 18:09:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:48,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:48,351 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:48,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:09:48,552 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash 939838177, now seen corresponding path program 133 times [2021-07-09 18:09:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:48,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465803495] [2021-07-09 18:09:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:48,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465803495] [2021-07-09 18:09:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465803495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667094287] [2021-07-09 18:09:48,814 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 [2021-07-09 18:09:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:49,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:49,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:49,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:49,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:49,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667094287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:49,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:49,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972009925] [2021-07-09 18:09:49,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:49,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:49,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:49,169 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:51,856 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-07-09 18:09:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:09:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:51,859 INFO L225 Difference]: With dead ends: 2226 [2021-07-09 18:09:51,859 INFO L226 Difference]: Without dead ends: 2170 [2021-07-09 18:09:51,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 2237.8ms TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:09:51,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-07-09 18:09:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-07-09 18:09:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-07-09 18:09:51,874 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-07-09 18:09:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:51,875 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-07-09 18:09:51,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-07-09 18:09:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:51,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:51,876 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:52,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-09 18:09:52,076 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash 834991559, now seen corresponding path program 134 times [2021-07-09 18:09:52,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:52,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696420951] [2021-07-09 18:09:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:52,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696420951] [2021-07-09 18:09:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696420951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139600253] [2021-07-09 18:09:52,327 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) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:52,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:52,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:52,525 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:52,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:52,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:52,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:52,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:52,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:52,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139600253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:52,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:52,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:52,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653370305] [2021-07-09 18:09:52,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:52,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:52,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:52,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:52,687 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:54,246 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-07-09 18:09:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:09:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:54,248 INFO L225 Difference]: With dead ends: 2035 [2021-07-09 18:09:54,249 INFO L226 Difference]: Without dead ends: 1979 [2021-07-09 18:09:54,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:09:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-07-09 18:09:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-07-09 18:09:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-07-09 18:09:54,262 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-07-09 18:09:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:54,262 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-07-09 18:09:54,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-07-09 18:09:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:54,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:54,263 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:54,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:54,464 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:54,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2101647219, now seen corresponding path program 135 times [2021-07-09 18:09:54,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:54,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945607399] [2021-07-09 18:09:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:54,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:54,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945607399] [2021-07-09 18:09:54,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945607399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:54,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416856353] [2021-07-09 18:09:54,709 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 [2021-07-09 18:09:54,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:09:54,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:54,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:09:54,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:09:54,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:54,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:54,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:54,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:09:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416856353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:55,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654729435] [2021-07-09 18:09:55,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:55,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:55,085 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:56,240 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-07-09 18:09:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:09:56,241 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:56,243 INFO L225 Difference]: With dead ends: 1668 [2021-07-09 18:09:56,243 INFO L226 Difference]: Without dead ends: 1572 [2021-07-09 18:09:56,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:09:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-07-09 18:09:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-07-09 18:09:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-07-09 18:09:56,255 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-07-09 18:09:56,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:56,255 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-07-09 18:09:56,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-07-09 18:09:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:56,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:56,257 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:56,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:56,457 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash -716024629, now seen corresponding path program 136 times [2021-07-09 18:09:56,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:56,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603057826] [2021-07-09 18:09:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603057826] [2021-07-09 18:09:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603057826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099508850] [2021-07-09 18:09:56,692 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 [2021-07-09 18:09:56,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:56,949 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:56,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:56,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:56,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099508850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729552205] [2021-07-09 18:09:57,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:57,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:57,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:57,069 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:58,166 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-07-09 18:09:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:09:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:09:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:58,168 INFO L225 Difference]: With dead ends: 1683 [2021-07-09 18:09:58,168 INFO L226 Difference]: Without dead ends: 1595 [2021-07-09 18:09:58,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:09:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-07-09 18:09:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-07-09 18:09:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-07-09 18:09:58,180 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-07-09 18:09:58,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:58,180 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-07-09 18:09:58,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-07-09 18:09:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:09:58,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:58,182 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:58,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:58,382 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1357135219, now seen corresponding path program 137 times [2021-07-09 18:09:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:58,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66795156] [2021-07-09 18:09:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:58,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66795156] [2021-07-09 18:09:58,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66795156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891065756] [2021-07-09 18:09:58,617 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 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 [2021-07-09 18:09:58,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:09:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:09:58,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:58,838 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:09:58,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:09:58,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:58,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:58,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:58,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:09:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891065756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:58,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:58,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:09:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531708942] [2021-07-09 18:09:58,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:09:58,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:09:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:09:58,981 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:00,597 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-07-09 18:10:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:10:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:00,600 INFO L225 Difference]: With dead ends: 1771 [2021-07-09 18:10:00,600 INFO L226 Difference]: Without dead ends: 1675 [2021-07-09 18:10:00,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:10:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-07-09 18:10:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-07-09 18:10:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-07-09 18:10:00,613 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-07-09 18:10:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:00,613 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-07-09 18:10:00,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-07-09 18:10:00,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:10:00,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:00,614 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:00,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 18:10:00,815 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash 69107147, now seen corresponding path program 138 times [2021-07-09 18:10:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:00,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27537458] [2021-07-09 18:10:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:01,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27537458] [2021-07-09 18:10:01,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27537458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370599711] [2021-07-09 18:10:01,067 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 [2021-07-09 18:10:01,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:10:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:01,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:10:01,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:01,317 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:10:01,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:10:01,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:01,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:01,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:01,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:10:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370599711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:01,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:01,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:10:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82938580] [2021-07-09 18:10:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:10:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:10:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:10:01,455 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:03,662 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-07-09 18:10:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:10:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:03,665 INFO L225 Difference]: With dead ends: 1940 [2021-07-09 18:10:03,665 INFO L226 Difference]: Without dead ends: 1862 [2021-07-09 18:10:03,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 1980.1ms TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:10:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-09 18:10:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-07-09 18:10:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-07-09 18:10:03,679 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-07-09 18:10:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:03,679 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-07-09 18:10:03,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-07-09 18:10:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:10:03,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:03,680 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:03,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-09 18:10:03,881 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:03,881 INFO L82 PathProgramCache]: Analyzing trace with hash -845525599, now seen corresponding path program 139 times [2021-07-09 18:10:03,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:03,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519191856] [2021-07-09 18:10:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:04,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:04,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519191856] [2021-07-09 18:10:04,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519191856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:04,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495192080] [2021-07-09 18:10:04,127 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 [2021-07-09 18:10:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:10:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:04,329 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:10:04,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:10:04,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:04,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:04,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:04,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:10:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:04,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495192080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:04,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:04,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-09 18:10:04,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102635464] [2021-07-09 18:10:04,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:10:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:10:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:10:04,491 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:06,106 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-07-09 18:10:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:10:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:06,109 INFO L225 Difference]: With dead ends: 1704 [2021-07-09 18:10:06,109 INFO L226 Difference]: Without dead ends: 1642 [2021-07-09 18:10:06,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1523.4ms TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:10:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-09 18:10:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-07-09 18:10:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-07-09 18:10:06,127 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-07-09 18:10:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:06,127 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-07-09 18:10:06,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-07-09 18:10:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:10:06,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:06,129 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:06,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:06,331 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -349346937, now seen corresponding path program 140 times [2021-07-09 18:10:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:06,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916663554] [2021-07-09 18:10:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:06,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:06,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916663554] [2021-07-09 18:10:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916663554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:06,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019098842] [2021-07-09 18:10:06,558 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 [2021-07-09 18:10:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:10:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:06,814 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:10:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:10:06,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:06,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:06,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:06,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-09 18:10:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019098842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:06,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:06,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:10:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085934052] [2021-07-09 18:10:06,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:10:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:10:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:10:06,936 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:08,299 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-07-09 18:10:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:10:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:08,301 INFO L225 Difference]: With dead ends: 1656 [2021-07-09 18:10:08,301 INFO L226 Difference]: Without dead ends: 1568 [2021-07-09 18:10:08,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1277.5ms TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:10:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-07-09 18:10:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-07-09 18:10:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-07-09 18:10:08,319 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-07-09 18:10:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:08,319 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-07-09 18:10:08,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-07-09 18:10:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:10:08,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:08,320 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:08,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-07-09 18:10:08,521 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -990457527, now seen corresponding path program 141 times [2021-07-09 18:10:08,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:08,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367118193] [2021-07-09 18:10:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:08,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367118193] [2021-07-09 18:10:08,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367118193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149303138] [2021-07-09 18:10:08,748 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 [2021-07-09 18:10:08,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:10:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:10:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:08,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:10:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:10:08,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:08,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:08,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:08,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:10:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:09,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149303138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:09,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:09,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:10:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955440682] [2021-07-09 18:10:09,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:10:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:10:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:10:09,110 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:10,613 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-07-09 18:10:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:10:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:10,615 INFO L225 Difference]: With dead ends: 1676 [2021-07-09 18:10:10,615 INFO L226 Difference]: Without dead ends: 1604 [2021-07-09 18:10:10,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1385.7ms TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:10:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-09 18:10:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-07-09 18:10:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-07-09 18:10:10,628 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-07-09 18:10:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:10,628 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-07-09 18:10:10,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-07-09 18:10:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:10:10,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:10,629 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:10,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:10,830 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash 435784839, now seen corresponding path program 142 times [2021-07-09 18:10:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:10,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623403313] [2021-07-09 18:10:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:11,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623403313] [2021-07-09 18:10:11,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623403313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:11,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338871322] [2021-07-09 18:10:11,060 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 [2021-07-09 18:10:11,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:10:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:11,286 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:10:11,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:10:11,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:11,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:11,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:11,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-09 18:10:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:11,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338871322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:11,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:11,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-09 18:10:11,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806251908] [2021-07-09 18:10:11,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:10:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:11,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:10:11,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:10:11,435 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:13,307 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-07-09 18:10:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:10:13,308 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:10:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:13,310 INFO L225 Difference]: With dead ends: 1714 [2021-07-09 18:10:13,310 INFO L226 Difference]: Without dead ends: 1652 [2021-07-09 18:10:13,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 1682.9ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:10:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-09 18:10:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-07-09 18:10:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-07-09 18:10:13,324 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-07-09 18:10:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:13,324 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-07-09 18:10:13,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-07-09 18:10:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:10:13,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:13,325 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:10:13,526 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1387234304, now seen corresponding path program 143 times [2021-07-09 18:10:13,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:13,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357894465] [2021-07-09 18:10:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:13,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357894465] [2021-07-09 18:10:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357894465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540502784] [2021-07-09 18:10:13,576 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 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 [2021-07-09 18:10:13,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:10:13,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:10:13,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:10:13,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:13,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:13,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:13,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:10:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:13,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540502784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:13,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:13,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 18:10:13,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180624086] [2021-07-09 18:10:13,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:10:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:10:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:10:13,663 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-09 18:10:13,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:13,941 INFO L93 Difference]: Finished difference Result 1735 states and 3460 transitions. [2021-07-09 18:10:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:10:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 36 [2021-07-09 18:10:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:13,943 INFO L225 Difference]: With dead ends: 1735 [2021-07-09 18:10:13,943 INFO L226 Difference]: Without dead ends: 1735 [2021-07-09 18:10:13,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:10:13,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-07-09 18:10:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1322. [2021-07-09 18:10:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.0098410295230886) internal successors, (2655), 1321 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2655 transitions. [2021-07-09 18:10:13,955 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2655 transitions. Word has length 36 [2021-07-09 18:10:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:13,955 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 2655 transitions. [2021-07-09 18:10:13,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-09 18:10:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2655 transitions. [2021-07-09 18:10:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:10:13,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:13,956 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:14,156 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 783776818, now seen corresponding path program 144 times [2021-07-09 18:10:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038648407] [2021-07-09 18:10:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:14,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038648407] [2021-07-09 18:10:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038648407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388520729] [2021-07-09 18:10:14,177 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 [2021-07-09 18:10:14,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:10:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:10:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388520729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:14,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:14,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:10:14,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407127941] [2021-07-09 18:10:14,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:10:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:10:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:10:14,256 INFO L87 Difference]: Start difference. First operand 1322 states and 2655 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:14,274 INFO L93 Difference]: Finished difference Result 1768 states and 3530 transitions. [2021-07-09 18:10:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:10:14,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:10:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:14,276 INFO L225 Difference]: With dead ends: 1768 [2021-07-09 18:10:14,276 INFO L226 Difference]: Without dead ends: 1713 [2021-07-09 18:10:14,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:10:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-09 18:10:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1600. [2021-07-09 18:10:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.038148843026892) internal successors, (3259), 1599 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3259 transitions. [2021-07-09 18:10:14,290 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3259 transitions. Word has length 37 [2021-07-09 18:10:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:14,291 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3259 transitions. [2021-07-09 18:10:14,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3259 transitions. [2021-07-09 18:10:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:14,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:14,292 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:14,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:14,493 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2072843805, now seen corresponding path program 145 times [2021-07-09 18:10:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:14,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10682339] [2021-07-09 18:10:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:14,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10682339] [2021-07-09 18:10:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10682339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499079996] [2021-07-09 18:10:14,852 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 [2021-07-09 18:10:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:14,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:14,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:15,124 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-09 18:10:15,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-09 18:10:15,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:15,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:15,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:15,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-09 18:10:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499079996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:15,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-07-09 18:10:15,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281053025] [2021-07-09 18:10:15,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:10:15,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:10:15,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:10:15,268 INFO L87 Difference]: Start difference. First operand 1600 states and 3259 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:16,565 INFO L93 Difference]: Finished difference Result 1794 states and 3597 transitions. [2021-07-09 18:10:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:10:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:16,568 INFO L225 Difference]: With dead ends: 1794 [2021-07-09 18:10:16,568 INFO L226 Difference]: Without dead ends: 1730 [2021-07-09 18:10:16,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1181.0ms TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:10:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-09 18:10:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1617. [2021-07-09 18:10:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 2.0340346534653464) internal successors, (3287), 1616 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 3287 transitions. [2021-07-09 18:10:16,582 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 3287 transitions. Word has length 40 [2021-07-09 18:10:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:16,582 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 3287 transitions. [2021-07-09 18:10:16,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 3287 transitions. [2021-07-09 18:10:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:16,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:16,584 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:16,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 18:10:16,784 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1011750747, now seen corresponding path program 146 times [2021-07-09 18:10:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:16,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307420720] [2021-07-09 18:10:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:17,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307420720] [2021-07-09 18:10:17,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307420720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082136566] [2021-07-09 18:10:17,158 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 [2021-07-09 18:10:17,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:17,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:17,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:17,504 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-09 18:10:17,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-09 18:10:17,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:17,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:17,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:17,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-09 18:10:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:17,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082136566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:17,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:17,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:17,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158739326] [2021-07-09 18:10:17,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:17,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:17,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:17,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:17,632 INFO L87 Difference]: Start difference. First operand 1617 states and 3287 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:19,114 INFO L93 Difference]: Finished difference Result 1818 states and 3644 transitions. [2021-07-09 18:10:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:10:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:19,116 INFO L225 Difference]: With dead ends: 1818 [2021-07-09 18:10:19,116 INFO L226 Difference]: Without dead ends: 1754 [2021-07-09 18:10:19,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1317.0ms TimeCoverageRelationStatistics Valid=244, Invalid=3062, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:10:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-07-09 18:10:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1623. [2021-07-09 18:10:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.0357583230579532) internal successors, (3302), 1622 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 3302 transitions. [2021-07-09 18:10:19,133 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 3302 transitions. Word has length 40 [2021-07-09 18:10:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:19,133 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 3302 transitions. [2021-07-09 18:10:19,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 3302 transitions. [2021-07-09 18:10:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:19,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:19,134 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:19,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:19,335 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -666824675, now seen corresponding path program 147 times [2021-07-09 18:10:19,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:19,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318760948] [2021-07-09 18:10:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:19,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:19,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318760948] [2021-07-09 18:10:19,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318760948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:19,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365469590] [2021-07-09 18:10:19,704 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 [2021-07-09 18:10:19,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:10:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:19,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:20,050 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:20,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:20,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:20,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:20,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:20,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-09 18:10:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:20,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365469590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:20,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:20,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458818844] [2021-07-09 18:10:20,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:20,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:20,179 INFO L87 Difference]: Start difference. First operand 1623 states and 3302 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:21,686 INFO L93 Difference]: Finished difference Result 1843 states and 3691 transitions. [2021-07-09 18:10:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:10:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:21,688 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 18:10:21,688 INFO L226 Difference]: Without dead ends: 1779 [2021-07-09 18:10:21,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1339.5ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:10:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-07-09 18:10:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1624. [2021-07-09 18:10:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.0357362908194703) internal successors, (3304), 1623 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 3304 transitions. [2021-07-09 18:10:21,703 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 3304 transitions. Word has length 40 [2021-07-09 18:10:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:21,703 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 3304 transitions. [2021-07-09 18:10:21,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 3304 transitions. [2021-07-09 18:10:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:21,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:21,704 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:21,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:21,905 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -252990117, now seen corresponding path program 148 times [2021-07-09 18:10:21,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:21,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257299346] [2021-07-09 18:10:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:22,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257299346] [2021-07-09 18:10:22,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257299346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:22,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091971256] [2021-07-09 18:10:22,282 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 [2021-07-09 18:10:22,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:22,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:22,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:22,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:22,627 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-09 18:10:22,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-09 18:10:22,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:22,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:22,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:22,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-09 18:10:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:22,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091971256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:22,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:22,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:22,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455792986] [2021-07-09 18:10:22,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:22,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:22,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:22,761 INFO L87 Difference]: Start difference. First operand 1624 states and 3304 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:24,438 INFO L93 Difference]: Finished difference Result 1881 states and 3769 transitions. [2021-07-09 18:10:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:10:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:24,441 INFO L225 Difference]: With dead ends: 1881 [2021-07-09 18:10:24,441 INFO L226 Difference]: Without dead ends: 1817 [2021-07-09 18:10:24,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:10:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-07-09 18:10:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1628. [2021-07-09 18:10:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.0356484326982174) internal successors, (3312), 1627 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3312 transitions. [2021-07-09 18:10:24,455 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3312 transitions. Word has length 40 [2021-07-09 18:10:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:24,455 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 3312 transitions. [2021-07-09 18:10:24,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3312 transitions. [2021-07-09 18:10:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:24,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:24,457 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:24,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:24,657 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash -924554723, now seen corresponding path program 149 times [2021-07-09 18:10:24,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:24,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922577339] [2021-07-09 18:10:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:25,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922577339] [2021-07-09 18:10:25,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922577339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:25,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429607374] [2021-07-09 18:10:25,024 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 [2021-07-09 18:10:25,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:10:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:10:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:25,383 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:25,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:25,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:25,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:25,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:25,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-09 18:10:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:25,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429607374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:25,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:25,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:25,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657431754] [2021-07-09 18:10:25,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:25,512 INFO L87 Difference]: Start difference. First operand 1628 states and 3312 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:27,563 INFO L93 Difference]: Finished difference Result 1922 states and 3854 transitions. [2021-07-09 18:10:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:10:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:27,566 INFO L225 Difference]: With dead ends: 1922 [2021-07-09 18:10:27,566 INFO L226 Difference]: Without dead ends: 1874 [2021-07-09 18:10:27,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1655.9ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:10:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-07-09 18:10:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1629. [2021-07-09 18:10:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.0356265356265357) internal successors, (3314), 1628 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3314 transitions. [2021-07-09 18:10:27,580 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3314 transitions. Word has length 40 [2021-07-09 18:10:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:27,580 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 3314 transitions. [2021-07-09 18:10:27,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3314 transitions. [2021-07-09 18:10:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:27,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:27,582 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:27,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:27,782 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:27,783 INFO L82 PathProgramCache]: Analyzing trace with hash 461067867, now seen corresponding path program 150 times [2021-07-09 18:10:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:27,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607562930] [2021-07-09 18:10:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:28,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:28,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607562930] [2021-07-09 18:10:28,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607562930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:28,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350484560] [2021-07-09 18:10:28,145 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 [2021-07-09 18:10:28,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:10:28,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:28,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:10:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:28,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:28,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:28,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:28,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:28,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:28,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350484560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:28,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:28,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-07-09 18:10:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434461029] [2021-07-09 18:10:28,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:10:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:10:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:10:28,877 INFO L87 Difference]: Start difference. First operand 1629 states and 3314 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:32,004 INFO L93 Difference]: Finished difference Result 2008 states and 4033 transitions. [2021-07-09 18:10:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:10:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:32,006 INFO L225 Difference]: With dead ends: 2008 [2021-07-09 18:10:32,006 INFO L226 Difference]: Without dead ends: 1964 [2021-07-09 18:10:32,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 2662.2ms TimeCoverageRelationStatistics Valid=564, Invalid=7446, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:10:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-07-09 18:10:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1644. [2021-07-09 18:10:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.037127206329884) internal successors, (3347), 1643 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3347 transitions. [2021-07-09 18:10:32,021 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3347 transitions. Word has length 40 [2021-07-09 18:10:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:32,021 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3347 transitions. [2021-07-09 18:10:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3347 transitions. [2021-07-09 18:10:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:32,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:32,023 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:32,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:32,223 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash -180042723, now seen corresponding path program 151 times [2021-07-09 18:10:32,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:32,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468200004] [2021-07-09 18:10:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:32,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468200004] [2021-07-09 18:10:32,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468200004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158101470] [2021-07-09 18:10:32,591 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 [2021-07-09 18:10:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:32,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:32,890 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:32,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:32,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:32,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:32,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-09 18:10:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158101470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:33,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:33,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:33,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379148783] [2021-07-09 18:10:33,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:33,051 INFO L87 Difference]: Start difference. First operand 1644 states and 3347 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:35,370 INFO L93 Difference]: Finished difference Result 2043 states and 4097 transitions. [2021-07-09 18:10:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:10:35,370 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:35,373 INFO L225 Difference]: With dead ends: 2043 [2021-07-09 18:10:35,373 INFO L226 Difference]: Without dead ends: 1986 [2021-07-09 18:10:35,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1831.4ms TimeCoverageRelationStatistics Valid=384, Invalid=4872, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:10:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-07-09 18:10:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1637. [2021-07-09 18:10:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.0354523227383865) internal successors, (3330), 1636 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3330 transitions. [2021-07-09 18:10:35,388 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3330 transitions. Word has length 40 [2021-07-09 18:10:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:35,388 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 3330 transitions. [2021-07-09 18:10:35,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3330 transitions. [2021-07-09 18:10:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:35,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:35,389 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:35,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:35,590 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1246199643, now seen corresponding path program 152 times [2021-07-09 18:10:35,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:35,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391561056] [2021-07-09 18:10:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:35,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391561056] [2021-07-09 18:10:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391561056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:35,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421841080] [2021-07-09 18:10:35,951 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 [2021-07-09 18:10:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:35,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:36,251 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-09 18:10:36,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-09 18:10:36,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:36,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:36,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:36,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-09 18:10:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:36,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421841080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:36,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:36,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-09 18:10:36,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472802030] [2021-07-09 18:10:36,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:10:36,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:10:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:10:36,411 INFO L87 Difference]: Start difference. First operand 1637 states and 3330 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:39,199 INFO L93 Difference]: Finished difference Result 2098 states and 4208 transitions. [2021-07-09 18:10:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:10:39,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:39,201 INFO L225 Difference]: With dead ends: 2098 [2021-07-09 18:10:39,201 INFO L226 Difference]: Without dead ends: 2054 [2021-07-09 18:10:39,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1997.8ms TimeCoverageRelationStatistics Valid=432, Invalid=5730, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:10:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-07-09 18:10:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1644. [2021-07-09 18:10:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.034692635423007) internal successors, (3343), 1643 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3343 transitions. [2021-07-09 18:10:39,222 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3343 transitions. Word has length 40 [2021-07-09 18:10:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3343 transitions. [2021-07-09 18:10:39,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3343 transitions. [2021-07-09 18:10:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:39,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:39,224 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:39,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:10:39,425 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:39,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2047913347, now seen corresponding path program 153 times [2021-07-09 18:10:39,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:39,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069211241] [2021-07-09 18:10:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:39,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069211241] [2021-07-09 18:10:39,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069211241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:39,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148288129] [2021-07-09 18:10:39,774 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 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 [2021-07-09 18:10:39,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:10:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:39,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:10:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:40,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:40,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:40,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 18:10:40,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:40,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:40,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-07-09 18:10:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:40,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148288129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:40,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:40,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-09 18:10:40,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510925695] [2021-07-09 18:10:40,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:10:40,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:10:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:10:40,553 INFO L87 Difference]: Start difference. First operand 1644 states and 3343 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:42,559 INFO L93 Difference]: Finished difference Result 1869 states and 3772 transitions. [2021-07-09 18:10:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:10:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:42,561 INFO L225 Difference]: With dead ends: 1869 [2021-07-09 18:10:42,561 INFO L226 Difference]: Without dead ends: 1827 [2021-07-09 18:10:42,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1964.7ms TimeCoverageRelationStatistics Valid=350, Invalid=4206, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:10:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-09 18:10:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1647. [2021-07-09 18:10:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 2.034021871202916) internal successors, (3348), 1646 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 3348 transitions. [2021-07-09 18:10:42,576 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 3348 transitions. Word has length 40 [2021-07-09 18:10:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 3348 transitions. [2021-07-09 18:10:42,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 3348 transitions. [2021-07-09 18:10:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:42,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:42,577 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:42,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 18:10:42,778 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1924564705, now seen corresponding path program 154 times [2021-07-09 18:10:42,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:42,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425804045] [2021-07-09 18:10:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425804045] [2021-07-09 18:10:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425804045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465405676] [2021-07-09 18:10:43,147 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 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 [2021-07-09 18:10:43,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:43,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:43,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:43,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:43,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:43,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:43,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:43,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:43,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:43,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:43,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465405676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:43,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:10:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562985548] [2021-07-09 18:10:43,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:10:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:10:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:10:43,740 INFO L87 Difference]: Start difference. First operand 1647 states and 3348 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:45,048 INFO L93 Difference]: Finished difference Result 1833 states and 3677 transitions. [2021-07-09 18:10:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:10:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:45,051 INFO L225 Difference]: With dead ends: 1833 [2021-07-09 18:10:45,051 INFO L226 Difference]: Without dead ends: 1769 [2021-07-09 18:10:45,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1362.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2959, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:10:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-07-09 18:10:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1656. [2021-07-09 18:10:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.0356495468277944) internal successors, (3369), 1655 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3369 transitions. [2021-07-09 18:10:45,065 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3369 transitions. Word has length 40 [2021-07-09 18:10:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:45,065 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3369 transitions. [2021-07-09 18:10:45,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3369 transitions. [2021-07-09 18:10:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:45,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:45,067 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:45,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-09 18:10:45,267 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash 691827169, now seen corresponding path program 155 times [2021-07-09 18:10:45,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:45,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73934142] [2021-07-09 18:10:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:45,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73934142] [2021-07-09 18:10:45,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73934142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075204698] [2021-07-09 18:10:45,631 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 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 [2021-07-09 18:10:45,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:10:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:45,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:10:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:46,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:46,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:46,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:46,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:46,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:10:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:46,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075204698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:46,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:46,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 42 [2021-07-09 18:10:46,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305814545] [2021-07-09 18:10:46,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:10:46,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:10:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:10:46,445 INFO L87 Difference]: Start difference. First operand 1656 states and 3369 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:47,985 INFO L93 Difference]: Finished difference Result 1870 states and 3744 transitions. [2021-07-09 18:10:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:10:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:47,988 INFO L225 Difference]: With dead ends: 1870 [2021-07-09 18:10:47,988 INFO L226 Difference]: Without dead ends: 1806 [2021-07-09 18:10:47,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1593.0ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:10:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-07-09 18:10:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1657. [2021-07-09 18:10:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.0356280193236715) internal successors, (3371), 1656 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 3371 transitions. [2021-07-09 18:10:48,002 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 3371 transitions. Word has length 40 [2021-07-09 18:10:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:48,002 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 3371 transitions. [2021-07-09 18:10:48,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 3371 transitions. [2021-07-09 18:10:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:48,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:48,004 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:48,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:48,204 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1105661727, now seen corresponding path program 156 times [2021-07-09 18:10:48,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:48,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613105413] [2021-07-09 18:10:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:48,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:48,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613105413] [2021-07-09 18:10:48,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613105413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:48,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039834221] [2021-07-09 18:10:48,565 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 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 [2021-07-09 18:10:48,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:10:48,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:48,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:10:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:49,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:49,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039834221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:49,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:49,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:10:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701624656] [2021-07-09 18:10:49,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:10:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:10:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:10:49,175 INFO L87 Difference]: Start difference. First operand 1657 states and 3371 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:51,324 INFO L93 Difference]: Finished difference Result 1870 states and 3754 transitions. [2021-07-09 18:10:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:10:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:51,326 INFO L225 Difference]: With dead ends: 1870 [2021-07-09 18:10:51,326 INFO L226 Difference]: Without dead ends: 1810 [2021-07-09 18:10:51,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1903.5ms TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:10:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-07-09 18:10:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1666. [2021-07-09 18:10:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0354354354354354) internal successors, (3389), 1665 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3389 transitions. [2021-07-09 18:10:51,348 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3389 transitions. Word has length 40 [2021-07-09 18:10:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:51,348 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3389 transitions. [2021-07-09 18:10:51,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3389 transitions. [2021-07-09 18:10:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:51,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:51,349 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:51,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:51,550 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash 434097121, now seen corresponding path program 157 times [2021-07-09 18:10:51,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:51,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49614669] [2021-07-09 18:10:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:51,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49614669] [2021-07-09 18:10:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49614669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303273763] [2021-07-09 18:10:51,903 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 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 [2021-07-09 18:10:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:51,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:52,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:52,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:52,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:52,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:52,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:52,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:52,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303273763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:10:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649842853] [2021-07-09 18:10:52,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:10:52,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:52,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:10:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:10:52,482 INFO L87 Difference]: Start difference. First operand 1666 states and 3389 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:54,191 INFO L93 Difference]: Finished difference Result 1953 states and 3910 transitions. [2021-07-09 18:10:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:10:54,191 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:54,193 INFO L225 Difference]: With dead ends: 1953 [2021-07-09 18:10:54,193 INFO L226 Difference]: Without dead ends: 1892 [2021-07-09 18:10:54,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1501.1ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:10:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-09 18:10:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1668. [2021-07-09 18:10:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.035392921415717) internal successors, (3393), 1667 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3393 transitions. [2021-07-09 18:10:54,208 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3393 transitions. Word has length 40 [2021-07-09 18:10:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:54,208 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3393 transitions. [2021-07-09 18:10:54,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3393 transitions. [2021-07-09 18:10:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:54,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:54,210 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:54,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:54,413 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1819719711, now seen corresponding path program 158 times [2021-07-09 18:10:54,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:54,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570088762] [2021-07-09 18:10:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:54,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570088762] [2021-07-09 18:10:54,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570088762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:54,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863523027] [2021-07-09 18:10:54,775 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:54,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:10:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:54,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:55,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:55,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:55,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:55,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:55,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:55,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:55,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863523027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:55,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:55,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:10:55,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556079210] [2021-07-09 18:10:55,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:10:55,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:10:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:10:55,373 INFO L87 Difference]: Start difference. First operand 1668 states and 3393 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:57,501 INFO L93 Difference]: Finished difference Result 1992 states and 3993 transitions. [2021-07-09 18:10:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:10:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:10:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:57,504 INFO L225 Difference]: With dead ends: 1992 [2021-07-09 18:10:57,504 INFO L226 Difference]: Without dead ends: 1944 [2021-07-09 18:10:57,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1695.6ms TimeCoverageRelationStatistics Valid=301, Invalid=3859, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:10:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-07-09 18:10:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1669. [2021-07-09 18:10:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0353717026378897) internal successors, (3395), 1668 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3395 transitions. [2021-07-09 18:10:57,518 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3395 transitions. Word has length 40 [2021-07-09 18:10:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:57,518 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3395 transitions. [2021-07-09 18:10:57,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3395 transitions. [2021-07-09 18:10:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:10:57,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:57,520 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:57,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:57,720 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1178609121, now seen corresponding path program 159 times [2021-07-09 18:10:57,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:57,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991796056] [2021-07-09 18:10:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:58,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991796056] [2021-07-09 18:10:58,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991796056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258551523] [2021-07-09 18:10:58,073 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:58,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:10:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:58,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:10:58,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:10:58,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:10:58,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:58,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:58,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:58,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:10:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:58,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258551523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:58,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:58,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:10:58,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409429926] [2021-07-09 18:10:58,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:10:58,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:10:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:10:58,651 INFO L87 Difference]: Start difference. First operand 1669 states and 3395 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:00,540 INFO L93 Difference]: Finished difference Result 2019 states and 4049 transitions. [2021-07-09 18:11:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:11:00,540 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:00,542 INFO L225 Difference]: With dead ends: 2019 [2021-07-09 18:11:00,542 INFO L226 Difference]: Without dead ends: 1987 [2021-07-09 18:11:00,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1697.8ms TimeCoverageRelationStatistics Valid=332, Invalid=4090, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:11:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-09 18:11:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1670. [2021-07-09 18:11:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.035350509286998) internal successors, (3397), 1669 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3397 transitions. [2021-07-09 18:11:00,558 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3397 transitions. Word has length 40 [2021-07-09 18:11:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:00,559 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3397 transitions. [2021-07-09 18:11:00,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3397 transitions. [2021-07-09 18:11:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:00,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:00,560 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:00,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-07-09 18:11:00,761 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1690115809, now seen corresponding path program 160 times [2021-07-09 18:11:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:00,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178496955] [2021-07-09 18:11:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:01,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178496955] [2021-07-09 18:11:01,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178496955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320182751] [2021-07-09 18:11:01,120 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:01,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:01,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:01,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:01,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:01,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:01,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:01,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320182751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:01,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:01,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:01,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511475900] [2021-07-09 18:11:01,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:01,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:01,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:01,675 INFO L87 Difference]: Start difference. First operand 1670 states and 3397 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:04,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:04,049 INFO L93 Difference]: Finished difference Result 2095 states and 4196 transitions. [2021-07-09 18:11:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:11:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:04,052 INFO L225 Difference]: With dead ends: 2095 [2021-07-09 18:11:04,052 INFO L226 Difference]: Without dead ends: 2051 [2021-07-09 18:11:04,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1897.6ms TimeCoverageRelationStatistics Valid=380, Invalid=4876, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:11:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-09 18:11:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1662. [2021-07-09 18:11:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-07-09 18:11:04,067 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-07-09 18:11:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:04,068 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-07-09 18:11:04,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-07-09 18:11:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:04,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:04,069 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:04,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 18:11:04,277 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1743439621, now seen corresponding path program 161 times [2021-07-09 18:11:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774193052] [2021-07-09 18:11:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:04,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:04,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774193052] [2021-07-09 18:11:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774193052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:04,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827003702] [2021-07-09 18:11:04,644 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:04,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:11:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:04,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:11:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:05,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-09 18:11:05,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:05,024 INFO L628 ElimStorePlain]: treesize reduction 5, result has 85.3 percent of original size [2021-07-09 18:11:05,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:05,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:16 [2021-07-09 18:11:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827003702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:05,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:05,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:11:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899434167] [2021-07-09 18:11:05,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:11:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:11:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:11:05,283 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:06,891 INFO L93 Difference]: Finished difference Result 1882 states and 3797 transitions. [2021-07-09 18:11:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:11:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:06,893 INFO L225 Difference]: With dead ends: 1882 [2021-07-09 18:11:06,893 INFO L226 Difference]: Without dead ends: 1840 [2021-07-09 18:11:06,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1540.9ms TimeCoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:11:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-07-09 18:11:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1650. [2021-07-09 18:11:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 2.0339599757428743) internal successors, (3354), 1649 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 3354 transitions. [2021-07-09 18:11:06,908 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 3354 transitions. Word has length 40 [2021-07-09 18:11:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:06,908 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 3354 transitions. [2021-07-09 18:11:06,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 3354 transitions. [2021-07-09 18:11:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:06,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:06,909 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:07,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:07,110 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:07,110 INFO L82 PathProgramCache]: Analyzing trace with hash -956912675, now seen corresponding path program 162 times [2021-07-09 18:11:07,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:07,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133271485] [2021-07-09 18:11:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:07,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133271485] [2021-07-09 18:11:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133271485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318105190] [2021-07-09 18:11:07,498 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:07,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:11:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:07,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:07,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:07,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:07,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:07,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:07,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:07,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:08,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318105190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:08,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:08,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:08,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110535855] [2021-07-09 18:11:08,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:08,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:08,093 INFO L87 Difference]: Start difference. First operand 1650 states and 3354 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:09,493 INFO L93 Difference]: Finished difference Result 1785 states and 3597 transitions. [2021-07-09 18:11:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:11:09,494 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:09,496 INFO L225 Difference]: With dead ends: 1785 [2021-07-09 18:11:09,496 INFO L226 Difference]: Without dead ends: 1721 [2021-07-09 18:11:09,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1375.1ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:11:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-07-09 18:11:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1653. [2021-07-09 18:11:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.0338983050847457) internal successors, (3360), 1652 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3360 transitions. [2021-07-09 18:11:09,510 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3360 transitions. Word has length 40 [2021-07-09 18:11:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3360 transitions. [2021-07-09 18:11:09,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3360 transitions. [2021-07-09 18:11:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:09,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:09,512 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:09,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 18:11:09,727 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash -543078117, now seen corresponding path program 163 times [2021-07-09 18:11:09,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:09,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237693343] [2021-07-09 18:11:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:10,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:10,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237693343] [2021-07-09 18:11:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237693343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:10,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654426352] [2021-07-09 18:11:10,104 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:10,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:10,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:10,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:10,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:10,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:10,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:10,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654426352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:10,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:10,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886397978] [2021-07-09 18:11:10,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:10,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:10,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:10,681 INFO L87 Difference]: Start difference. First operand 1653 states and 3360 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:12,181 INFO L93 Difference]: Finished difference Result 1790 states and 3610 transitions. [2021-07-09 18:11:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:11:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:12,183 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:11:12,183 INFO L226 Difference]: Without dead ends: 1730 [2021-07-09 18:11:12,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1428.5ms TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:11:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-09 18:11:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1659. [2021-07-09 18:11:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.033775633293124) internal successors, (3372), 1658 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3372 transitions. [2021-07-09 18:11:12,198 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3372 transitions. Word has length 40 [2021-07-09 18:11:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:12,198 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3372 transitions. [2021-07-09 18:11:12,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3372 transitions. [2021-07-09 18:11:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:12,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:12,200 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:12,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:11:12,401 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1214642723, now seen corresponding path program 164 times [2021-07-09 18:11:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:12,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699250595] [2021-07-09 18:11:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:12,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:12,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699250595] [2021-07-09 18:11:12,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699250595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:12,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311590646] [2021-07-09 18:11:12,761 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:12,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:12,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:13,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:13,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:13,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:13,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:13,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:13,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311590646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:13,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:13,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436214694] [2021-07-09 18:11:13,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:13,332 INFO L87 Difference]: Start difference. First operand 1659 states and 3372 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:15,060 INFO L93 Difference]: Finished difference Result 1821 states and 3675 transitions. [2021-07-09 18:11:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:11:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:15,062 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:11:15,062 INFO L226 Difference]: Without dead ends: 1773 [2021-07-09 18:11:15,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1441.3ms TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:11:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-09 18:11:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1660. [2021-07-09 18:11:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 2.0337552742616034) internal successors, (3374), 1659 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 3374 transitions. [2021-07-09 18:11:15,077 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 3374 transitions. Word has length 40 [2021-07-09 18:11:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:15,077 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 3374 transitions. [2021-07-09 18:11:15,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 3374 transitions. [2021-07-09 18:11:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:15,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:15,079 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:15,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 18:11:15,279 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:15,279 INFO L82 PathProgramCache]: Analyzing trace with hash 170979867, now seen corresponding path program 165 times [2021-07-09 18:11:15,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:15,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116879060] [2021-07-09 18:11:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:15,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:15,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116879060] [2021-07-09 18:11:15,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116879060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:15,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428698779] [2021-07-09 18:11:15,652 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:15,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:11:15,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:11:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:16,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:16,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:16,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:16,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:16,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:16,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:11:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:16,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428698779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:16,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:16,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:16,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137577344] [2021-07-09 18:11:16,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:16,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:16,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:16,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:16,243 INFO L87 Difference]: Start difference. First operand 1660 states and 3374 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:17,962 INFO L93 Difference]: Finished difference Result 1879 states and 3796 transitions. [2021-07-09 18:11:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:17,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:17,965 INFO L225 Difference]: With dead ends: 1879 [2021-07-09 18:11:17,965 INFO L226 Difference]: Without dead ends: 1831 [2021-07-09 18:11:17,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1620.5ms TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:11:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-07-09 18:11:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1664. [2021-07-09 18:11:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-09 18:11:17,979 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-09 18:11:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:17,979 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-09 18:11:17,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-09 18:11:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:17,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:17,981 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:18,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:18,181 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -470130723, now seen corresponding path program 166 times [2021-07-09 18:11:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:18,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626391485] [2021-07-09 18:11:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:18,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:18,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626391485] [2021-07-09 18:11:18,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626391485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:18,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450036784] [2021-07-09 18:11:18,531 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:18,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:18,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:18,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:18,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:18,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:18,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:18,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:18,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:18,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:18,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:19,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450036784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:19,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:19,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:19,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076158252] [2021-07-09 18:11:19,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:19,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:19,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:19,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:19,092 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:20,688 INFO L93 Difference]: Finished difference Result 1901 states and 3843 transitions. [2021-07-09 18:11:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:20,691 INFO L225 Difference]: With dead ends: 1901 [2021-07-09 18:11:20,691 INFO L226 Difference]: Without dead ends: 1869 [2021-07-09 18:11:20,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1528.2ms TimeCoverageRelationStatistics Valid=318, Invalid=3588, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:11:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-07-09 18:11:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1665. [2021-07-09 18:11:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-07-09 18:11:20,706 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-07-09 18:11:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:20,706 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-07-09 18:11:20,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-07-09 18:11:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:20,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:20,707 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:20,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 18:11:20,908 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash 956111643, now seen corresponding path program 167 times [2021-07-09 18:11:20,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:20,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076909448] [2021-07-09 18:11:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076909448] [2021-07-09 18:11:21,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076909448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206418541] [2021-07-09 18:11:21,273 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:21,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:11:21,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:11:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:21,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:21,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:21,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:21,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:21,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:21,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:21,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:11:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:21,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206418541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:21,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:21,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:21,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005317] [2021-07-09 18:11:21,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:21,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:21,811 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:23,916 INFO L93 Difference]: Finished difference Result 1968 states and 3978 transitions. [2021-07-09 18:11:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:11:23,917 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:23,919 INFO L225 Difference]: With dead ends: 1968 [2021-07-09 18:11:23,919 INFO L226 Difference]: Without dead ends: 1924 [2021-07-09 18:11:23,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1767.1ms TimeCoverageRelationStatistics Valid=382, Invalid=4448, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:11:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-09 18:11:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1662. [2021-07-09 18:11:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-07-09 18:11:23,933 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-07-09 18:11:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:23,933 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-07-09 18:11:23,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-07-09 18:11:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:23,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:23,935 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:24,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:24,135 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 931216087, now seen corresponding path program 168 times [2021-07-09 18:11:24,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:24,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72051059] [2021-07-09 18:11:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:24,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72051059] [2021-07-09 18:11:24,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72051059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719707367] [2021-07-09 18:11:24,488 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:24,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:11:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:11:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:24,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:24,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:24,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:24,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:24,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:24,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-07-09 18:11:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:25,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719707367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:25,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:25,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:25,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565722654] [2021-07-09 18:11:25,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:25,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:25,035 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:26,489 INFO L93 Difference]: Finished difference Result 1796 states and 3627 transitions. [2021-07-09 18:11:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:11:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:26,491 INFO L225 Difference]: With dead ends: 1796 [2021-07-09 18:11:26,491 INFO L226 Difference]: Without dead ends: 1768 [2021-07-09 18:11:26,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1394.6ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:11:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-07-09 18:11:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1655. [2021-07-09 18:11:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 2.033857315598549) internal successors, (3364), 1654 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 3364 transitions. [2021-07-09 18:11:26,505 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 3364 transitions. Word has length 40 [2021-07-09 18:11:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:26,505 INFO L482 AbstractCegarLoop]: Abstraction has 1655 states and 3364 transitions. [2021-07-09 18:11:26,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 3364 transitions. [2021-07-09 18:11:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:26,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:26,506 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:26,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:26,707 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1074502817, now seen corresponding path program 169 times [2021-07-09 18:11:26,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:26,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226356001] [2021-07-09 18:11:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:27,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:27,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226356001] [2021-07-09 18:11:27,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226356001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:27,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092988943] [2021-07-09 18:11:27,086 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:27,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:27,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:27,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:27,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:27,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:27,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:27,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:27,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:27,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:27,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092988943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:27,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:27,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:27,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487525034] [2021-07-09 18:11:27,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:27,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:27,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:27,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:27,666 INFO L87 Difference]: Start difference. First operand 1655 states and 3364 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:29,552 INFO L93 Difference]: Finished difference Result 1816 states and 3662 transitions. [2021-07-09 18:11:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:11:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:29,555 INFO L225 Difference]: With dead ends: 1816 [2021-07-09 18:11:29,555 INFO L226 Difference]: Without dead ends: 1756 [2021-07-09 18:11:29,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1570.3ms TimeCoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:11:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-09 18:11:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1664. [2021-07-09 18:11:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-09 18:11:29,569 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-09 18:11:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:29,569 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-09 18:11:29,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-09 18:11:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:29,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:29,570 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:29,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:29,771 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1746067423, now seen corresponding path program 170 times [2021-07-09 18:11:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:29,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264347080] [2021-07-09 18:11:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:30,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:30,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264347080] [2021-07-09 18:11:30,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264347080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:30,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193823525] [2021-07-09 18:11:30,144 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:30,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:30,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:30,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:30,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:30,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:30,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:30,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:30,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193823525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:30,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680667664] [2021-07-09 18:11:30,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:30,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:30,718 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:32,480 INFO L93 Difference]: Finished difference Result 1832 states and 3697 transitions. [2021-07-09 18:11:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:32,483 INFO L225 Difference]: With dead ends: 1832 [2021-07-09 18:11:32,483 INFO L226 Difference]: Without dead ends: 1784 [2021-07-09 18:11:32,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1644.4ms TimeCoverageRelationStatistics Valid=316, Invalid=3590, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:11:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-09 18:11:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1666. [2021-07-09 18:11:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-07-09 18:11:32,502 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-07-09 18:11:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:32,502 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-07-09 18:11:32,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-07-09 18:11:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:32,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:32,504 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:32,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 18:11:32,705 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -360444833, now seen corresponding path program 171 times [2021-07-09 18:11:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:32,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266286834] [2021-07-09 18:11:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:33,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:33,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266286834] [2021-07-09 18:11:33,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266286834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:33,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955402931] [2021-07-09 18:11:33,063 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:33,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:11:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:33,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:11:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:33,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:33,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:33,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:33,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:33,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:33,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:33,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:33,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:11:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955402931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:33,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:33,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-09 18:11:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719417255] [2021-07-09 18:11:33,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:11:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:11:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:11:33,796 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:35,762 INFO L93 Difference]: Finished difference Result 1885 states and 3808 transitions. [2021-07-09 18:11:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:11:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:35,764 INFO L225 Difference]: With dead ends: 1885 [2021-07-09 18:11:35,765 INFO L226 Difference]: Without dead ends: 1841 [2021-07-09 18:11:35,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1825.7ms TimeCoverageRelationStatistics Valid=369, Invalid=4323, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:11:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-07-09 18:11:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1669. [2021-07-09 18:11:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-07-09 18:11:35,779 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-07-09 18:11:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:35,779 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-07-09 18:11:35,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-07-09 18:11:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:35,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:35,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:35,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-09 18:11:35,981 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1001555423, now seen corresponding path program 172 times [2021-07-09 18:11:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:35,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276466439] [2021-07-09 18:11:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:36,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276466439] [2021-07-09 18:11:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276466439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697940494] [2021-07-09 18:11:36,345 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:36,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:36,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:36,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:36,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:36,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:36,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:36,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:36,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697940494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:36,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:36,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379123449] [2021-07-09 18:11:36,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:36,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:36,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:36,921 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:38,710 INFO L93 Difference]: Finished difference Result 1920 states and 3881 transitions. [2021-07-09 18:11:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:11:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:38,712 INFO L225 Difference]: With dead ends: 1920 [2021-07-09 18:11:38,713 INFO L226 Difference]: Without dead ends: 1888 [2021-07-09 18:11:38,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1691.4ms TimeCoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:11:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-09 18:11:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1670. [2021-07-09 18:11:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.0335530257639305) internal successors, (3394), 1669 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3394 transitions. [2021-07-09 18:11:38,727 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3394 transitions. Word has length 40 [2021-07-09 18:11:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:38,727 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3394 transitions. [2021-07-09 18:11:38,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3394 transitions. [2021-07-09 18:11:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:38,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:38,729 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:38,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 18:11:38,929 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 424686943, now seen corresponding path program 173 times [2021-07-09 18:11:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887151962] [2021-07-09 18:11:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:39,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:39,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887151962] [2021-07-09 18:11:39,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887151962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:39,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509811378] [2021-07-09 18:11:39,318 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:39,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:11:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:11:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:39,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:39,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:39,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:39,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:39,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:39,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:11:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509811378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:39,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:39,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953317952] [2021-07-09 18:11:39,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:39,853 INFO L87 Difference]: Start difference. First operand 1670 states and 3394 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:42,199 INFO L93 Difference]: Finished difference Result 1996 states and 4031 transitions. [2021-07-09 18:11:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:11:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:42,202 INFO L225 Difference]: With dead ends: 1996 [2021-07-09 18:11:42,202 INFO L226 Difference]: Without dead ends: 1952 [2021-07-09 18:11:42,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 2001.2ms TimeCoverageRelationStatistics Valid=460, Invalid=5240, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:11:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-07-09 18:11:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1666. [2021-07-09 18:11:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-07-09 18:11:42,216 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-07-09 18:11:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:42,216 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-07-09 18:11:42,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-07-09 18:11:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:42,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:42,218 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:42,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 18:11:42,418 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1990940629, now seen corresponding path program 174 times [2021-07-09 18:11:42,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:42,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248032869] [2021-07-09 18:11:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:42,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:42,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248032869] [2021-07-09 18:11:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248032869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:42,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178757323] [2021-07-09 18:11:42,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:42,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:11:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:42,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:11:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:43,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:43,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:43,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 18:11:43,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:43,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:43,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:43,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-07-09 18:11:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:43,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178757323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:43,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:43,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-09 18:11:43,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34123009] [2021-07-09 18:11:43,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:11:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:11:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:11:43,543 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:45,598 INFO L93 Difference]: Finished difference Result 1809 states and 3648 transitions. [2021-07-09 18:11:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:11:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:45,600 INFO L225 Difference]: With dead ends: 1809 [2021-07-09 18:11:45,600 INFO L226 Difference]: Without dead ends: 1767 [2021-07-09 18:11:45,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1970.9ms TimeCoverageRelationStatistics Valid=349, Invalid=4207, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:11:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-09 18:11:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1658. [2021-07-09 18:11:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.0337960168980085) internal successors, (3370), 1657 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 3370 transitions. [2021-07-09 18:11:45,614 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 3370 transitions. Word has length 40 [2021-07-09 18:11:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:45,615 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 3370 transitions. [2021-07-09 18:11:45,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 3370 transitions. [2021-07-09 18:11:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:45,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:45,622 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:45,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 18:11:45,823 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:45,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990365, now seen corresponding path program 175 times [2021-07-09 18:11:45,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:45,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843700041] [2021-07-09 18:11:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:46,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843700041] [2021-07-09 18:11:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843700041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351458567] [2021-07-09 18:11:46,191 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:46,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:46,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:46,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:46,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:46,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:46,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:46,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351458567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:46,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:46,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65465541] [2021-07-09 18:11:46,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:46,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:46,745 INFO L87 Difference]: Start difference. First operand 1658 states and 3370 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:48,375 INFO L93 Difference]: Finished difference Result 1800 states and 3631 transitions. [2021-07-09 18:11:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:11:48,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:48,377 INFO L225 Difference]: With dead ends: 1800 [2021-07-09 18:11:48,377 INFO L226 Difference]: Without dead ends: 1752 [2021-07-09 18:11:48,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1473.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3261, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:11:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-07-09 18:11:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1661. [2021-07-09 18:11:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.0337349397590363) internal successors, (3376), 1660 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3376 transitions. [2021-07-09 18:11:48,391 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3376 transitions. Word has length 40 [2021-07-09 18:11:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:48,391 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 3376 transitions. [2021-07-09 18:11:48,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3376 transitions. [2021-07-09 18:11:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:48,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:48,393 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:48,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:48,593 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1704354341, now seen corresponding path program 176 times [2021-07-09 18:11:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:48,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49159762] [2021-07-09 18:11:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:48,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49159762] [2021-07-09 18:11:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49159762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:48,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802186995] [2021-07-09 18:11:48,960 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:48,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:48,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:49,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:49,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:49,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:49,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:49,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:49,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:49,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:49,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802186995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:49,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:49,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069481361] [2021-07-09 18:11:49,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:49,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:49,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:49,510 INFO L87 Difference]: Start difference. First operand 1661 states and 3376 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:51,119 INFO L93 Difference]: Finished difference Result 1833 states and 3700 transitions. [2021-07-09 18:11:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:11:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:51,121 INFO L225 Difference]: With dead ends: 1833 [2021-07-09 18:11:51,121 INFO L226 Difference]: Without dead ends: 1789 [2021-07-09 18:11:51,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1528.3ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:11:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-07-09 18:11:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1664. [2021-07-09 18:11:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-09 18:11:51,136 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-09 18:11:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:51,136 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-09 18:11:51,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-09 18:11:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:51,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:51,137 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:51,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-09 18:11:51,338 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1949502365, now seen corresponding path program 177 times [2021-07-09 18:11:51,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:51,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427234328] [2021-07-09 18:11:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:51,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427234328] [2021-07-09 18:11:51,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427234328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:51,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092464471] [2021-07-09 18:11:51,704 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:51,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:11:51,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:51,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:52,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:52,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:52,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:52,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:52,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:52,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:52,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092464471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:52,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:52,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661905566] [2021-07-09 18:11:52,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:52,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:52,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:52,246 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:53,825 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-07-09 18:11:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:11:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:53,827 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 18:11:53,827 INFO L226 Difference]: Without dead ends: 1811 [2021-07-09 18:11:53,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:11:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-07-09 18:11:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1665. [2021-07-09 18:11:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-07-09 18:11:53,842 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-07-09 18:11:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:53,842 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-07-09 18:11:53,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-07-09 18:11:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:53,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:53,844 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:54,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:54,044 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:54,045 INFO L82 PathProgramCache]: Analyzing trace with hash -919222565, now seen corresponding path program 178 times [2021-07-09 18:11:54,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:54,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204061566] [2021-07-09 18:11:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:54,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204061566] [2021-07-09 18:11:54,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204061566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:54,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516928909] [2021-07-09 18:11:54,431 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:54,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:11:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:54,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:54,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:54,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:11:54,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:54,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:54,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:54,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:11:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516928909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:54,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:54,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:11:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505295862] [2021-07-09 18:11:54,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:11:54,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:54,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:11:54,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:11:54,964 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:57,197 INFO L93 Difference]: Finished difference Result 1909 states and 3849 transitions. [2021-07-09 18:11:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:11:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:11:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:57,200 INFO L225 Difference]: With dead ends: 1909 [2021-07-09 18:11:57,200 INFO L226 Difference]: Without dead ends: 1853 [2021-07-09 18:11:57,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1932.5ms TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:11:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-09 18:11:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1667. [2021-07-09 18:11:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.033013205282113) internal successors, (3387), 1666 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 3387 transitions. [2021-07-09 18:11:57,216 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 3387 transitions. Word has length 40 [2021-07-09 18:11:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:57,216 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 3387 transitions. [2021-07-09 18:11:57,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 3387 transitions. [2021-07-09 18:11:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:11:57,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:57,218 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:57,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-09 18:11:57,418 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1833855311, now seen corresponding path program 179 times [2021-07-09 18:11:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124335671] [2021-07-09 18:11:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:57,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124335671] [2021-07-09 18:11:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124335671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113378461] [2021-07-09 18:11:57,784 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:57,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:11:57,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:57,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:11:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:58,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:58,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:11:58,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:11:58,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:58,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:58,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:58,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:58,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-07-09 18:11:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113378461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:11:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789632787] [2021-07-09 18:11:58,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:11:58,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:11:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:11:58,424 INFO L87 Difference]: Start difference. First operand 1667 states and 3387 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:00,361 INFO L93 Difference]: Finished difference Result 1820 states and 3671 transitions. [2021-07-09 18:12:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:12:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:00,364 INFO L225 Difference]: With dead ends: 1820 [2021-07-09 18:12:00,364 INFO L226 Difference]: Without dead ends: 1792 [2021-07-09 18:12:00,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1730.4ms TimeCoverageRelationStatistics Valid=336, Invalid=4220, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:12:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-07-09 18:12:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1656. [2021-07-09 18:12:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.033836858006042) internal successors, (3366), 1655 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3366 transitions. [2021-07-09 18:12:00,379 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3366 transitions. Word has length 40 [2021-07-09 18:12:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:00,379 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3366 transitions. [2021-07-09 18:12:00,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3366 transitions. [2021-07-09 18:12:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:00,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:00,381 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:00,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:00,581 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1720310829, now seen corresponding path program 180 times [2021-07-09 18:12:00,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:00,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120900906] [2021-07-09 18:12:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:00,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120900906] [2021-07-09 18:12:00,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120900906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:00,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918011446] [2021-07-09 18:12:00,943 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:00,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:12:00,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:00,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:01,663 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-09 18:12:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 18:12:01,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:01,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:01,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:01,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:66, output treesize:25 [2021-07-09 18:12:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:01,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918011446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:01,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:01,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-07-09 18:12:01,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810223139] [2021-07-09 18:12:01,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:12:01,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:12:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:12:01,886 INFO L87 Difference]: Start difference. First operand 1656 states and 3366 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:05,454 INFO L93 Difference]: Finished difference Result 1886 states and 3775 transitions. [2021-07-09 18:12:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:12:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:05,456 INFO L225 Difference]: With dead ends: 1886 [2021-07-09 18:12:05,456 INFO L226 Difference]: Without dead ends: 1755 [2021-07-09 18:12:05,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 3054.3ms TimeCoverageRelationStatistics Valid=452, Invalid=6520, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:12:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-07-09 18:12:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1668. [2021-07-09 18:12:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.033593281343731) internal successors, (3390), 1667 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3390 transitions. [2021-07-09 18:12:05,470 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3390 transitions. Word has length 40 [2021-07-09 18:12:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:05,470 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3390 transitions. [2021-07-09 18:12:05,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3390 transitions. [2021-07-09 18:12:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:05,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:05,472 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:12:05,672 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 896081045, now seen corresponding path program 181 times [2021-07-09 18:12:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:05,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418962197] [2021-07-09 18:12:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:06,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418962197] [2021-07-09 18:12:06,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418962197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83915474] [2021-07-09 18:12:06,034 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:06,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:06,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:06,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:06,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:06,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:06,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:06,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:06,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:06,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:06,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83915474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:06,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:06,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522193685] [2021-07-09 18:12:06,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:06,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:06,625 INFO L87 Difference]: Start difference. First operand 1668 states and 3390 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:08,036 INFO L93 Difference]: Finished difference Result 1815 states and 3656 transitions. [2021-07-09 18:12:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:12:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:08,038 INFO L225 Difference]: With dead ends: 1815 [2021-07-09 18:12:08,038 INFO L226 Difference]: Without dead ends: 1751 [2021-07-09 18:12:08,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=225, Invalid=2855, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:12:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-07-09 18:12:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1669. [2021-07-09 18:12:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-07-09 18:12:08,052 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-07-09 18:12:08,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:08,052 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-07-09 18:12:08,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-07-09 18:12:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:08,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:08,054 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:08,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:08,254 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1309915603, now seen corresponding path program 182 times [2021-07-09 18:12:08,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:08,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709784069] [2021-07-09 18:12:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709784069] [2021-07-09 18:12:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709784069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992066830] [2021-07-09 18:12:08,626 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:08,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:08,651 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:09,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:09,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:09,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:09,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:09,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:09,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992066830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:09,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:09,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338993300] [2021-07-09 18:12:09,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:09,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:09,232 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:10,882 INFO L93 Difference]: Finished difference Result 1847 states and 3724 transitions. [2021-07-09 18:12:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:12:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:10,885 INFO L225 Difference]: With dead ends: 1847 [2021-07-09 18:12:10,885 INFO L226 Difference]: Without dead ends: 1783 [2021-07-09 18:12:10,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1469.1ms TimeCoverageRelationStatistics Valid=237, Invalid=3069, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:12:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-07-09 18:12:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1673. [2021-07-09 18:12:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.0334928229665072) internal successors, (3400), 1672 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 3400 transitions. [2021-07-09 18:12:10,899 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 3400 transitions. Word has length 40 [2021-07-09 18:12:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:10,899 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 3400 transitions. [2021-07-09 18:12:10,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 3400 transitions. [2021-07-09 18:12:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:10,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:10,900 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:11,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:11,101 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash 638350997, now seen corresponding path program 183 times [2021-07-09 18:12:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:11,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101611103] [2021-07-09 18:12:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:11,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:11,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101611103] [2021-07-09 18:12:11,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101611103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:11,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933326171] [2021-07-09 18:12:11,460 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:11,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:12:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:12:11,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:11,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:11,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:11,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:11,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:11,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:11,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:12:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933326171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:12,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449728077] [2021-07-09 18:12:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:12,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:12,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:12,055 INFO L87 Difference]: Start difference. First operand 1673 states and 3400 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:13,570 INFO L93 Difference]: Finished difference Result 1877 states and 3788 transitions. [2021-07-09 18:12:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:12:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:13,572 INFO L225 Difference]: With dead ends: 1877 [2021-07-09 18:12:13,572 INFO L226 Difference]: Without dead ends: 1829 [2021-07-09 18:12:13,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1395.7ms TimeCoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:12:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-09 18:12:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1674. [2021-07-09 18:12:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.0334728033472804) internal successors, (3402), 1673 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3402 transitions. [2021-07-09 18:12:13,587 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3402 transitions. Word has length 40 [2021-07-09 18:12:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:13,587 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3402 transitions. [2021-07-09 18:12:13,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3402 transitions. [2021-07-09 18:12:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:13,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:13,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:13,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-07-09 18:12:13,789 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2023973587, now seen corresponding path program 184 times [2021-07-09 18:12:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:13,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457328199] [2021-07-09 18:12:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:14,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457328199] [2021-07-09 18:12:14,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457328199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828972132] [2021-07-09 18:12:14,161 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:12:14,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:14,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:14,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:14,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:14,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:14,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:14,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828972132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:14,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:14,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:14,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300489905] [2021-07-09 18:12:14,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:14,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:14,773 INFO L87 Difference]: Start difference. First operand 1674 states and 3402 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:16,627 INFO L93 Difference]: Finished difference Result 1931 states and 3899 transitions. [2021-07-09 18:12:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:12:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:16,630 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 18:12:16,630 INFO L226 Difference]: Without dead ends: 1871 [2021-07-09 18:12:16,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1634.1ms TimeCoverageRelationStatistics Valid=287, Invalid=3619, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:12:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-07-09 18:12:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1681. [2021-07-09 18:12:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 2.033333333333333) internal successors, (3416), 1680 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 3416 transitions. [2021-07-09 18:12:16,645 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 3416 transitions. Word has length 40 [2021-07-09 18:12:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:16,645 INFO L482 AbstractCegarLoop]: Abstraction has 1681 states and 3416 transitions. [2021-07-09 18:12:16,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 3416 transitions. [2021-07-09 18:12:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:16,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:16,647 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:16,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:16,847 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1382862997, now seen corresponding path program 185 times [2021-07-09 18:12:16,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:16,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51445171] [2021-07-09 18:12:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:17,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:17,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51445171] [2021-07-09 18:12:17,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51445171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:17,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133115496] [2021-07-09 18:12:17,207 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:17,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:17,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:12:17,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:17,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:17,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:17,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-09 18:12:17,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:17,599 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-09 18:12:17,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:17,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:13 [2021-07-09 18:12:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:17,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133115496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:17,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:17,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:12:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666159068] [2021-07-09 18:12:17,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:12:17,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:12:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:12:17,823 INFO L87 Difference]: Start difference. First operand 1681 states and 3416 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:20,689 INFO L93 Difference]: Finished difference Result 2209 states and 4431 transitions. [2021-07-09 18:12:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:12:20,689 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:20,691 INFO L225 Difference]: With dead ends: 2209 [2021-07-09 18:12:20,691 INFO L226 Difference]: Without dead ends: 2124 [2021-07-09 18:12:20,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2288.1ms TimeCoverageRelationStatistics Valid=513, Invalid=6293, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:12:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-07-09 18:12:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1708. [2021-07-09 18:12:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.0374926772114823) internal successors, (3478), 1707 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3478 transitions. [2021-07-09 18:12:20,706 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3478 transitions. Word has length 40 [2021-07-09 18:12:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:20,707 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 3478 transitions. [2021-07-09 18:12:20,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3478 transitions. [2021-07-09 18:12:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:20,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:20,708 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:20,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-09 18:12:20,910 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1485861933, now seen corresponding path program 186 times [2021-07-09 18:12:20,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:20,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92071744] [2021-07-09 18:12:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:21,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:21,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92071744] [2021-07-09 18:12:21,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92071744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:21,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049098475] [2021-07-09 18:12:21,270 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:21,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:12:21,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:21,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:12:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:21,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:21,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:21,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:21,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:21,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:21,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:12:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:21,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049098475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:21,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:21,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:21,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851505380] [2021-07-09 18:12:21,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:21,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:21,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:21,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:21,835 INFO L87 Difference]: Start difference. First operand 1708 states and 3478 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:24,095 INFO L93 Difference]: Finished difference Result 2036 states and 4122 transitions. [2021-07-09 18:12:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:12:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:24,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:24,097 INFO L225 Difference]: With dead ends: 2036 [2021-07-09 18:12:24,098 INFO L226 Difference]: Without dead ends: 1992 [2021-07-09 18:12:24,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1737.0ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:12:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-09 18:12:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1703. [2021-07-09 18:12:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.0376028202115157) internal successors, (3468), 1702 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 3468 transitions. [2021-07-09 18:12:24,113 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 3468 transitions. Word has length 40 [2021-07-09 18:12:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:24,113 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 3468 transitions. [2021-07-09 18:12:24,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 3468 transitions. [2021-07-09 18:12:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:24,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:24,115 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:24,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,317 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:24,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1947693497, now seen corresponding path program 187 times [2021-07-09 18:12:24,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:24,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939805809] [2021-07-09 18:12:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939805809] [2021-07-09 18:12:24,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939805809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305410592] [2021-07-09 18:12:24,725 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:24,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:25,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-09 18:12:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305410592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:25,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430248532] [2021-07-09 18:12:25,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:25,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:25,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:25,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:25,338 INFO L87 Difference]: Start difference. First operand 1703 states and 3468 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:26,726 INFO L93 Difference]: Finished difference Result 1908 states and 3862 transitions. [2021-07-09 18:12:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:12:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:26,729 INFO L225 Difference]: With dead ends: 1908 [2021-07-09 18:12:26,729 INFO L226 Difference]: Without dead ends: 1880 [2021-07-09 18:12:26,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1434.4ms TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:12:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-07-09 18:12:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1698. [2021-07-09 18:12:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.037713612256924) internal successors, (3458), 1697 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 3458 transitions. [2021-07-09 18:12:26,745 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 3458 transitions. Word has length 40 [2021-07-09 18:12:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:26,745 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 3458 transitions. [2021-07-09 18:12:26,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 3458 transitions. [2021-07-09 18:12:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:26,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:26,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:26,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:26,947 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -752658799, now seen corresponding path program 188 times [2021-07-09 18:12:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:26,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468014784] [2021-07-09 18:12:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:27,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:27,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468014784] [2021-07-09 18:12:27,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468014784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60544437] [2021-07-09 18:12:27,311 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:27,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:27,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:27,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:27,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:27,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:27,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:27,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:27,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:27,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:27,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60544437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:27,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:27,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835197928] [2021-07-09 18:12:27,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:27,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:27,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:27,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:27,911 INFO L87 Difference]: Start difference. First operand 1698 states and 3458 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:29,394 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-07-09 18:12:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:12:29,394 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:29,396 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 18:12:29,396 INFO L226 Difference]: Without dead ends: 1779 [2021-07-09 18:12:29,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1366.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:12:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-07-09 18:12:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1701. [2021-07-09 18:12:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.0376470588235294) internal successors, (3464), 1700 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3464 transitions. [2021-07-09 18:12:29,411 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3464 transitions. Word has length 40 [2021-07-09 18:12:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:29,411 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 3464 transitions. [2021-07-09 18:12:29,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3464 transitions. [2021-07-09 18:12:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:29,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:29,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:29,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-09 18:12:29,613 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash -338824241, now seen corresponding path program 189 times [2021-07-09 18:12:29,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:29,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692269419] [2021-07-09 18:12:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:29,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692269419] [2021-07-09 18:12:29,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692269419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847319972] [2021-07-09 18:12:29,976 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:30,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:12:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:30,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:12:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:30,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:30,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:30,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:30,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:30,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:30,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847319972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:12:30,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722006966] [2021-07-09 18:12:30,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:12:30,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:12:30,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:12:30,586 INFO L87 Difference]: Start difference. First operand 1701 states and 3464 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:32,584 INFO L93 Difference]: Finished difference Result 1973 states and 3965 transitions. [2021-07-09 18:12:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:12:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:32,587 INFO L225 Difference]: With dead ends: 1973 [2021-07-09 18:12:32,587 INFO L226 Difference]: Without dead ends: 1853 [2021-07-09 18:12:32,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1919.6ms TimeCoverageRelationStatistics Valid=369, Invalid=4601, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:12:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-09 18:12:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1716. [2021-07-09 18:12:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.0379008746355685) internal successors, (3495), 1715 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3495 transitions. [2021-07-09 18:12:32,602 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3495 transitions. Word has length 40 [2021-07-09 18:12:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:32,602 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 3495 transitions. [2021-07-09 18:12:32,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3495 transitions. [2021-07-09 18:12:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:32,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:32,604 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:32,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 18:12:32,804 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1010388847, now seen corresponding path program 190 times [2021-07-09 18:12:32,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:32,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77878662] [2021-07-09 18:12:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77878662] [2021-07-09 18:12:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77878662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204816325] [2021-07-09 18:12:33,172 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:33,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:33,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:33,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:33,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:33,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:33,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:33,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:33,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204816325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:33,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:33,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990988812] [2021-07-09 18:12:33,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:33,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:33,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:33,753 INFO L87 Difference]: Start difference. First operand 1716 states and 3495 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:35,923 INFO L93 Difference]: Finished difference Result 1993 states and 4005 transitions. [2021-07-09 18:12:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:12:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:35,925 INFO L225 Difference]: With dead ends: 1993 [2021-07-09 18:12:35,925 INFO L226 Difference]: Without dead ends: 1897 [2021-07-09 18:12:35,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1885.1ms TimeCoverageRelationStatistics Valid=392, Invalid=4438, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:12:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-07-09 18:12:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1717. [2021-07-09 18:12:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 2.037878787878788) internal successors, (3497), 1716 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3497 transitions. [2021-07-09 18:12:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3497 transitions. Word has length 40 [2021-07-09 18:12:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:35,940 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3497 transitions. [2021-07-09 18:12:35,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3497 transitions. [2021-07-09 18:12:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:35,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:35,942 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 18:12:36,143 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash 375233743, now seen corresponding path program 191 times [2021-07-09 18:12:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596778258] [2021-07-09 18:12:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:36,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:36,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596778258] [2021-07-09 18:12:36,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596778258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:36,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743256561] [2021-07-09 18:12:36,507 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:36,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:12:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:36,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:36,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:36,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:36,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:36,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:36,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:12:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743256561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:37,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:37,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:37,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507525532] [2021-07-09 18:12:37,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:37,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:37,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:37,077 INFO L87 Difference]: Start difference. First operand 1717 states and 3497 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:39,852 INFO L93 Difference]: Finished difference Result 2085 states and 4199 transitions. [2021-07-09 18:12:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:12:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:39,854 INFO L225 Difference]: With dead ends: 2085 [2021-07-09 18:12:39,854 INFO L226 Difference]: Without dead ends: 1993 [2021-07-09 18:12:39,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2154.3ms TimeCoverageRelationStatistics Valid=443, Invalid=5107, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:12:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-09 18:12:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1729. [2021-07-09 18:12:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 2.0399305555555554) internal successors, (3525), 1728 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3525 transitions. [2021-07-09 18:12:39,869 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3525 transitions. Word has length 40 [2021-07-09 18:12:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:39,869 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3525 transitions. [2021-07-09 18:12:39,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3525 transitions. [2021-07-09 18:12:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:39,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:39,871 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:40,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 18:12:40,071 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash -265876847, now seen corresponding path program 192 times [2021-07-09 18:12:40,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:40,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710971604] [2021-07-09 18:12:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:40,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:40,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710971604] [2021-07-09 18:12:40,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710971604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:40,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471891894] [2021-07-09 18:12:40,436 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:40,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:12:40,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:40,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:40,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:40,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:40,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:40,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:40,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:40,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:40,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471891894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:40,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:40,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:40,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931596089] [2021-07-09 18:12:40,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:40,985 INFO L87 Difference]: Start difference. First operand 1729 states and 3525 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:43,561 INFO L93 Difference]: Finished difference Result 2102 states and 4236 transitions. [2021-07-09 18:12:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:12:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:43,563 INFO L225 Difference]: With dead ends: 2102 [2021-07-09 18:12:43,564 INFO L226 Difference]: Without dead ends: 2038 [2021-07-09 18:12:43,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2033.7ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:12:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-07-09 18:12:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1730. [2021-07-09 18:12:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.0399074609600927) internal successors, (3527), 1729 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3527 transitions. [2021-07-09 18:12:43,580 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3527 transitions. Word has length 40 [2021-07-09 18:12:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:43,580 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 3527 transitions. [2021-07-09 18:12:43,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3527 transitions. [2021-07-09 18:12:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:43,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:43,581 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:43,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-09 18:12:43,782 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1160365519, now seen corresponding path program 193 times [2021-07-09 18:12:43,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:43,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465346039] [2021-07-09 18:12:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:44,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465346039] [2021-07-09 18:12:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465346039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076740127] [2021-07-09 18:12:44,141 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:44,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:44,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:44,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:44,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:44,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076740127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:44,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671100854] [2021-07-09 18:12:44,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:44,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:44,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:44,700 INFO L87 Difference]: Start difference. First operand 1730 states and 3527 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:47,638 INFO L93 Difference]: Finished difference Result 2190 states and 4414 transitions. [2021-07-09 18:12:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:12:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:47,641 INFO L225 Difference]: With dead ends: 2190 [2021-07-09 18:12:47,641 INFO L226 Difference]: Without dead ends: 2118 [2021-07-09 18:12:47,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2334.6ms TimeCoverageRelationStatistics Valid=546, Invalid=6260, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:12:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-07-09 18:12:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1723. [2021-07-09 18:12:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.0394889663182347) internal successors, (3512), 1722 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 3512 transitions. [2021-07-09 18:12:47,657 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 3512 transitions. Word has length 40 [2021-07-09 18:12:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:47,657 INFO L482 AbstractCegarLoop]: Abstraction has 1723 states and 3512 transitions. [2021-07-09 18:12:47,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 3512 transitions. [2021-07-09 18:12:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:47,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:47,659 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:47,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-09 18:12:47,859 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1135469963, now seen corresponding path program 194 times [2021-07-09 18:12:47,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:47,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986344536] [2021-07-09 18:12:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:48,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:48,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986344536] [2021-07-09 18:12:48,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986344536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:48,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452709002] [2021-07-09 18:12:48,227 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:48,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:48,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:12:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:48,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:48,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:48,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:48,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:48,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:12:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452709002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:48,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:48,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037697584] [2021-07-09 18:12:48,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:48,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:48,792 INFO L87 Difference]: Start difference. First operand 1723 states and 3512 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:50,723 INFO L93 Difference]: Finished difference Result 1913 states and 3862 transitions. [2021-07-09 18:12:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:12:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:50,725 INFO L225 Difference]: With dead ends: 1913 [2021-07-09 18:12:50,725 INFO L226 Difference]: Without dead ends: 1857 [2021-07-09 18:12:50,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1753.6ms TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:12:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-07-09 18:12:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1718. [2021-07-09 18:12:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.0396039603960396) internal successors, (3502), 1717 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3502 transitions. [2021-07-09 18:12:50,739 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3502 transitions. Word has length 40 [2021-07-09 18:12:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:50,740 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 3502 transitions. [2021-07-09 18:12:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3502 transitions. [2021-07-09 18:12:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:50,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:50,741 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:50,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:50,942 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:50,942 INFO L82 PathProgramCache]: Analyzing trace with hash -870248941, now seen corresponding path program 195 times [2021-07-09 18:12:50,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:50,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469114515] [2021-07-09 18:12:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:51,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:51,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469114515] [2021-07-09 18:12:51,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469114515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:51,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820071854] [2021-07-09 18:12:51,311 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:51,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:12:51,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:51,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:12:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:51,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:51,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:51,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:51,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:51,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:51,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820071854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:12:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232857363] [2021-07-09 18:12:51,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:12:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:12:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:12:51,926 INFO L87 Difference]: Start difference. First operand 1718 states and 3502 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:54,139 INFO L93 Difference]: Finished difference Result 1950 states and 3923 transitions. [2021-07-09 18:12:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:12:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:54,141 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 18:12:54,141 INFO L226 Difference]: Without dead ends: 1830 [2021-07-09 18:12:54,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1961.3ms TimeCoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:12:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-07-09 18:12:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1741. [2021-07-09 18:12:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-09 18:12:54,156 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-09 18:12:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:54,156 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-09 18:12:54,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-09 18:12:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:54,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:54,158 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:54,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 18:12:54,358 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1541813547, now seen corresponding path program 196 times [2021-07-09 18:12:54,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:54,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211400593] [2021-07-09 18:12:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:54,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211400593] [2021-07-09 18:12:54,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211400593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018161467] [2021-07-09 18:12:54,725 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:54,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:54,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:12:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:55,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:12:55,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:55,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:55,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:55,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:12:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:55,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018161467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:55,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:55,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:55,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877835241] [2021-07-09 18:12:55,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:55,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:55,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:55,304 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:57,629 INFO L93 Difference]: Finished difference Result 1953 states and 3933 transitions. [2021-07-09 18:12:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:12:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:12:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:57,631 INFO L225 Difference]: With dead ends: 1953 [2021-07-09 18:12:57,631 INFO L226 Difference]: Without dead ends: 1857 [2021-07-09 18:12:57,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2023.1ms TimeCoverageRelationStatistics Valid=401, Invalid=4711, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:12:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-07-09 18:12:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1743. [2021-07-09 18:12:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-07-09 18:12:57,645 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-07-09 18:12:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:57,645 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-07-09 18:12:57,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-07-09 18:12:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:12:57,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:57,647 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:57,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:57,847 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash -156190957, now seen corresponding path program 197 times [2021-07-09 18:12:57,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:57,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070463832] [2021-07-09 18:12:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:58,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070463832] [2021-07-09 18:12:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070463832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:58,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338099610] [2021-07-09 18:12:58,212 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:58,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:58,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:12:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:58,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:12:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:58,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338099610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:58,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:58,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:12:58,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530583771] [2021-07-09 18:12:58,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:12:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:12:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:58,803 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:01,233 INFO L93 Difference]: Finished difference Result 2027 states and 4088 transitions. [2021-07-09 18:13:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:13:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:01,235 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 18:13:01,235 INFO L226 Difference]: Without dead ends: 1939 [2021-07-09 18:13:01,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2173.8ms TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:13:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-07-09 18:13:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1748. [2021-07-09 18:13:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.0394962793360047) internal successors, (3563), 1747 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3563 transitions. [2021-07-09 18:13:01,250 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3563 transitions. Word has length 40 [2021-07-09 18:13:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:01,250 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3563 transitions. [2021-07-09 18:13:01,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3563 transitions. [2021-07-09 18:13:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:01,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:01,252 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:01,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:01,452 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -797301547, now seen corresponding path program 198 times [2021-07-09 18:13:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:01,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667452277] [2021-07-09 18:13:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:01,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667452277] [2021-07-09 18:13:01,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667452277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:01,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158477798] [2021-07-09 18:13:01,810 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:01,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:13:01,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:01,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:02,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:02,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:02,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:02,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:02,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:02,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:02,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158477798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:02,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092740137] [2021-07-09 18:13:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:02,353 INFO L87 Difference]: Start difference. First operand 1748 states and 3563 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:04,876 INFO L93 Difference]: Finished difference Result 2061 states and 4160 transitions. [2021-07-09 18:13:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:13:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:04,878 INFO L225 Difference]: With dead ends: 2061 [2021-07-09 18:13:04,878 INFO L226 Difference]: Without dead ends: 1997 [2021-07-09 18:13:04,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 2147.9ms TimeCoverageRelationStatistics Valid=502, Invalid=5350, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:13:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-07-09 18:13:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1749. [2021-07-09 18:13:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.039473684210526) internal successors, (3565), 1748 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 3565 transitions. [2021-07-09 18:13:04,893 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 3565 transitions. Word has length 40 [2021-07-09 18:13:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:04,893 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 3565 transitions. [2021-07-09 18:13:04,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 3565 transitions. [2021-07-09 18:13:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:04,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:04,895 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:05,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:05,095 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash 628940819, now seen corresponding path program 199 times [2021-07-09 18:13:05,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:05,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423947003] [2021-07-09 18:13:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:05,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423947003] [2021-07-09 18:13:05,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423947003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052670634] [2021-07-09 18:13:05,464 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:05,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:05,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:05,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:05,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:05,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:06,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052670634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:06,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:06,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:06,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028946984] [2021-07-09 18:13:06,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:06,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:06,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:06,007 INFO L87 Difference]: Start difference. First operand 1749 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:09,698 INFO L93 Difference]: Finished difference Result 2161 states and 4359 transitions. [2021-07-09 18:13:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:13:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:09,701 INFO L225 Difference]: With dead ends: 2161 [2021-07-09 18:13:09,701 INFO L226 Difference]: Without dead ends: 2089 [2021-07-09 18:13:09,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2597.5ms TimeCoverageRelationStatistics Valid=638, Invalid=7372, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:13:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-09 18:13:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1743. [2021-07-09 18:13:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-07-09 18:13:09,722 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-07-09 18:13:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:09,723 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-07-09 18:13:09,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-07-09 18:13:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:09,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:09,724 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:09,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-09 18:13:09,925 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1786686753, now seen corresponding path program 200 times [2021-07-09 18:13:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:09,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6606927] [2021-07-09 18:13:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:10,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:10,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6606927] [2021-07-09 18:13:10,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6606927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:10,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493266794] [2021-07-09 18:13:10,291 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:10,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:10,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:10,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:13:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:10,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:10,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:10,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:10,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:10,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:13:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:10,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493266794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:10,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:10,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956103152] [2021-07-09 18:13:10,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:10,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:10,840 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:12,814 INFO L93 Difference]: Finished difference Result 1931 states and 3897 transitions. [2021-07-09 18:13:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:13:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:12,817 INFO L225 Difference]: With dead ends: 1931 [2021-07-09 18:13:12,817 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 18:13:12,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1802.0ms TimeCoverageRelationStatistics Valid=353, Invalid=4759, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:13:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 18:13:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1741. [2021-07-09 18:13:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-09 18:13:12,833 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-09 18:13:12,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:12,833 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-09 18:13:12,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-09 18:13:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:12,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:12,835 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:13,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:13,035 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1409244241, now seen corresponding path program 201 times [2021-07-09 18:13:13,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:13,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142865915] [2021-07-09 18:13:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:13,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142865915] [2021-07-09 18:13:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142865915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700905166] [2021-07-09 18:13:13,445 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:13,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:13:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:13,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:13,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:13,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:13,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700905166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435171491] [2021-07-09 18:13:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:14,030 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:15,684 INFO L93 Difference]: Finished difference Result 1883 states and 3808 transitions. [2021-07-09 18:13:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:13:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:15,686 INFO L225 Difference]: With dead ends: 1883 [2021-07-09 18:13:15,687 INFO L226 Difference]: Without dead ends: 1835 [2021-07-09 18:13:15,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1554.4ms TimeCoverageRelationStatistics Valid=276, Invalid=3264, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:13:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-07-09 18:13:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1744. [2021-07-09 18:13:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.0390131956397015) internal successors, (3554), 1743 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 3554 transitions. [2021-07-09 18:13:15,701 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 3554 transitions. Word has length 40 [2021-07-09 18:13:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:15,701 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 3554 transitions. [2021-07-09 18:13:15,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 3554 transitions. [2021-07-09 18:13:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:15,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:15,703 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:15,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:13:15,903 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:15,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1500100465, now seen corresponding path program 202 times [2021-07-09 18:13:15,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:15,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330045394] [2021-07-09 18:13:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:16,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330045394] [2021-07-09 18:13:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330045394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937513801] [2021-07-09 18:13:16,275 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:16,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:16,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:16,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:16,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:16,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937513801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:16,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:16,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:16,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231913561] [2021-07-09 18:13:16,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:16,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:16,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:16,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:16,848 INFO L87 Difference]: Start difference. First operand 1744 states and 3554 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:18,397 INFO L93 Difference]: Finished difference Result 1916 states and 3877 transitions. [2021-07-09 18:13:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:13:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:18,400 INFO L225 Difference]: With dead ends: 1916 [2021-07-09 18:13:18,400 INFO L226 Difference]: Without dead ends: 1872 [2021-07-09 18:13:18,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1529.6ms TimeCoverageRelationStatistics Valid=290, Invalid=3370, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:13:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-07-09 18:13:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1747. [2021-07-09 18:13:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.0389461626575027) internal successors, (3560), 1746 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3560 transitions. [2021-07-09 18:13:18,415 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3560 transitions. Word has length 40 [2021-07-09 18:13:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:18,415 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 3560 transitions. [2021-07-09 18:13:18,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3560 transitions. [2021-07-09 18:13:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:18,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:18,417 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:18,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 18:13:18,617 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2141211055, now seen corresponding path program 203 times [2021-07-09 18:13:18,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:18,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998305285] [2021-07-09 18:13:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:18,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998305285] [2021-07-09 18:13:18,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998305285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:18,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713241547] [2021-07-09 18:13:18,988 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:13:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:19,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:13:19,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:19,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:19,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:19,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:19,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:19,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:13:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:19,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713241547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:19,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:19,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-09 18:13:19,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157916555] [2021-07-09 18:13:19,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:13:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:13:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:13:19,670 INFO L87 Difference]: Start difference. First operand 1747 states and 3560 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:21,403 INFO L93 Difference]: Finished difference Result 1926 states and 3897 transitions. [2021-07-09 18:13:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:13:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:21,405 INFO L225 Difference]: With dead ends: 1926 [2021-07-09 18:13:21,405 INFO L226 Difference]: Without dead ends: 1894 [2021-07-09 18:13:21,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1716.3ms TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:13:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-09 18:13:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1748. [2021-07-09 18:13:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.038923869490555) internal successors, (3562), 1747 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3562 transitions. [2021-07-09 18:13:21,422 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3562 transitions. Word has length 40 [2021-07-09 18:13:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3562 transitions. [2021-07-09 18:13:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3562 transitions. [2021-07-09 18:13:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:21,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:21,424 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:21,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:21,624 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -714968689, now seen corresponding path program 204 times [2021-07-09 18:13:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:21,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260014123] [2021-07-09 18:13:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:22,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260014123] [2021-07-09 18:13:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260014123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279207681] [2021-07-09 18:13:22,004 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:22,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:13:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:13:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:22,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:22,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:22,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:22,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:13:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:22,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279207681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:22,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:22,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359718674] [2021-07-09 18:13:22,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:22,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:22,535 INFO L87 Difference]: Start difference. First operand 1748 states and 3562 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:24,762 INFO L93 Difference]: Finished difference Result 1992 states and 4026 transitions. [2021-07-09 18:13:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:13:24,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:24,765 INFO L225 Difference]: With dead ends: 1992 [2021-07-09 18:13:24,765 INFO L226 Difference]: Without dead ends: 1936 [2021-07-09 18:13:24,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1918.7ms TimeCoverageRelationStatistics Valid=465, Invalid=5085, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:13:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-09 18:13:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1750. [2021-07-09 18:13:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 2.03830760434534) internal successors, (3565), 1749 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3565 transitions. [2021-07-09 18:13:24,780 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3565 transitions. Word has length 40 [2021-07-09 18:13:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:24,780 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3565 transitions. [2021-07-09 18:13:24,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3565 transitions. [2021-07-09 18:13:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:24,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:24,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:24,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-09 18:13:24,982 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:24,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1629601435, now seen corresponding path program 205 times [2021-07-09 18:13:24,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:24,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889938317] [2021-07-09 18:13:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:25,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889938317] [2021-07-09 18:13:25,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889938317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017426221] [2021-07-09 18:13:25,349 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:25,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:25,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:25,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:25,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:25,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:25,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-09 18:13:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:25,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017426221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:25,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:25,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:25,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831211556] [2021-07-09 18:13:25,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:25,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:25,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:25,880 INFO L87 Difference]: Start difference. First operand 1750 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:27,745 INFO L93 Difference]: Finished difference Result 1906 states and 3854 transitions. [2021-07-09 18:13:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:13:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:27,748 INFO L225 Difference]: With dead ends: 1906 [2021-07-09 18:13:27,748 INFO L226 Difference]: Without dead ends: 1878 [2021-07-09 18:13:27,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1617.6ms TimeCoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:13:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-07-09 18:13:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1741. [2021-07-09 18:13:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-09 18:13:27,764 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-09 18:13:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:27,764 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-09 18:13:27,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-09 18:13:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:27,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:27,765 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:27,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 18:13:27,966 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1162379203, now seen corresponding path program 206 times [2021-07-09 18:13:27,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:27,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012517662] [2021-07-09 18:13:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:28,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:28,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012517662] [2021-07-09 18:13:28,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012517662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:28,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017958882] [2021-07-09 18:13:28,340 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:28,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:28,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:28,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:28,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:28,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:28,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:28,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:28,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017958882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:28,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:28,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:28,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966058391] [2021-07-09 18:13:28,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:28,915 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:30,349 INFO L93 Difference]: Finished difference Result 1890 states and 3818 transitions. [2021-07-09 18:13:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:13:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:30,351 INFO L225 Difference]: With dead ends: 1890 [2021-07-09 18:13:30,351 INFO L226 Difference]: Without dead ends: 1826 [2021-07-09 18:13:30,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:13:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-07-09 18:13:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1745. [2021-07-09 18:13:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 2.0389908256880735) internal successors, (3556), 1744 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 3556 transitions. [2021-07-09 18:13:30,366 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 3556 transitions. Word has length 40 [2021-07-09 18:13:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:30,366 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 3556 transitions. [2021-07-09 18:13:30,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 3556 transitions. [2021-07-09 18:13:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:30,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:30,368 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:30,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:30,568 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1576213761, now seen corresponding path program 207 times [2021-07-09 18:13:30,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:30,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312146784] [2021-07-09 18:13:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:30,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:30,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312146784] [2021-07-09 18:13:30,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312146784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:30,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341474761] [2021-07-09 18:13:30,939 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:13:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:30,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:13:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:31,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:31,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341474761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:31,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:13:31,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574893857] [2021-07-09 18:13:31,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:31,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:31,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:31,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:31,530 INFO L87 Difference]: Start difference. First operand 1745 states and 3556 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:33,693 INFO L93 Difference]: Finished difference Result 2022 states and 4068 transitions. [2021-07-09 18:13:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:13:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:33,695 INFO L225 Difference]: With dead ends: 2022 [2021-07-09 18:13:33,695 INFO L226 Difference]: Without dead ends: 1902 [2021-07-09 18:13:33,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1996.0ms TimeCoverageRelationStatistics Valid=378, Invalid=4878, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:13:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-07-09 18:13:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1761. [2021-07-09 18:13:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.039772727272727) internal successors, (3590), 1760 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3590 transitions. [2021-07-09 18:13:33,710 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3590 transitions. Word has length 40 [2021-07-09 18:13:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:33,710 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 3590 transitions. [2021-07-09 18:13:33,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3590 transitions. [2021-07-09 18:13:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:33,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:33,712 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:33,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:33,912 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 904649155, now seen corresponding path program 208 times [2021-07-09 18:13:33,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:33,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259903543] [2021-07-09 18:13:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:34,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259903543] [2021-07-09 18:13:34,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259903543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:34,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221330020] [2021-07-09 18:13:34,267 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:34,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:34,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:34,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:34,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:34,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221330020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:34,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934123124] [2021-07-09 18:13:34,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:34,837 INFO L87 Difference]: Start difference. First operand 1761 states and 3590 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:37,439 INFO L93 Difference]: Finished difference Result 2042 states and 4108 transitions. [2021-07-09 18:13:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:13:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:37,441 INFO L225 Difference]: With dead ends: 2042 [2021-07-09 18:13:37,441 INFO L226 Difference]: Without dead ends: 1945 [2021-07-09 18:13:37,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2147.3ms TimeCoverageRelationStatistics Valid=452, Invalid=5248, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:13:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-09 18:13:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1762. [2021-07-09 18:13:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 2.0391822827938673) internal successors, (3591), 1761 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3591 transitions. [2021-07-09 18:13:37,457 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3591 transitions. Word has length 40 [2021-07-09 18:13:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:37,457 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3591 transitions. [2021-07-09 18:13:37,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3591 transitions. [2021-07-09 18:13:37,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:37,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:37,459 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:37,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:37,659 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2004695551, now seen corresponding path program 209 times [2021-07-09 18:13:37,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:37,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326729069] [2021-07-09 18:13:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:38,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326729069] [2021-07-09 18:13:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326729069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902207638] [2021-07-09 18:13:38,024 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:38,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:13:38,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:38,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:13:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:38,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:38,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:38,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:38,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:38,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:13:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:38,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902207638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:38,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:38,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:38,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939509465] [2021-07-09 18:13:38,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:38,593 INFO L87 Difference]: Start difference. First operand 1762 states and 3591 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:41,592 INFO L93 Difference]: Finished difference Result 2140 states and 4313 transitions. [2021-07-09 18:13:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:13:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:41,595 INFO L225 Difference]: With dead ends: 2140 [2021-07-09 18:13:41,595 INFO L226 Difference]: Without dead ends: 2048 [2021-07-09 18:13:41,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2393.9ms TimeCoverageRelationStatistics Valid=497, Invalid=5983, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:13:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-09 18:13:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1774. [2021-07-09 18:13:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.04117315284828) internal successors, (3619), 1773 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 3619 transitions. [2021-07-09 18:13:41,611 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 3619 transitions. Word has length 40 [2021-07-09 18:13:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:41,611 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 3619 transitions. [2021-07-09 18:13:41,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 3619 transitions. [2021-07-09 18:13:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:41,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:41,613 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:41,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:41,813 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1649161155, now seen corresponding path program 210 times [2021-07-09 18:13:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:41,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691383641] [2021-07-09 18:13:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:42,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:42,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691383641] [2021-07-09 18:13:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691383641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:42,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106574408] [2021-07-09 18:13:42,167 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:42,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:13:42,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:42,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:42,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:42,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:42,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:42,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106574408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:42,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:42,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712185092] [2021-07-09 18:13:42,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:42,727 INFO L87 Difference]: Start difference. First operand 1774 states and 3619 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:45,709 INFO L93 Difference]: Finished difference Result 2160 states and 4356 transitions. [2021-07-09 18:13:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:13:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:45,711 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 18:13:45,711 INFO L226 Difference]: Without dead ends: 2096 [2021-07-09 18:13:45,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2281.2ms TimeCoverageRelationStatistics Valid=511, Invalid=5809, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:13:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-07-09 18:13:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1775. [2021-07-09 18:13:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.0411499436302143) internal successors, (3621), 1774 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 3621 transitions. [2021-07-09 18:13:45,728 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 3621 transitions. Word has length 40 [2021-07-09 18:13:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:45,728 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 3621 transitions. [2021-07-09 18:13:45,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 3621 transitions. [2021-07-09 18:13:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:45,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:45,729 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:45,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:45,930 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1219563775, now seen corresponding path program 211 times [2021-07-09 18:13:45,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:45,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878949191] [2021-07-09 18:13:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:46,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878949191] [2021-07-09 18:13:46,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878949191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955129081] [2021-07-09 18:13:46,281 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:46,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:46,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:46,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:46,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955129081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:46,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:46,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705325660] [2021-07-09 18:13:46,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:46,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:46,829 INFO L87 Difference]: Start difference. First operand 1775 states and 3621 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:50,240 INFO L93 Difference]: Finished difference Result 2253 states and 4543 transitions. [2021-07-09 18:13:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:13:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:50,243 INFO L225 Difference]: With dead ends: 2253 [2021-07-09 18:13:50,243 INFO L226 Difference]: Without dead ends: 2181 [2021-07-09 18:13:50,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 2584.2ms TimeCoverageRelationStatistics Valid=603, Invalid=7229, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:13:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-09 18:13:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1764. [2021-07-09 18:13:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 2.0385706182643224) internal successors, (3594), 1763 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 3594 transitions. [2021-07-09 18:13:50,259 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 3594 transitions. Word has length 40 [2021-07-09 18:13:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:50,259 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 3594 transitions. [2021-07-09 18:13:50,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 3594 transitions. [2021-07-09 18:13:50,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:50,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:50,261 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:50,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 18:13:50,462 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1244459331, now seen corresponding path program 212 times [2021-07-09 18:13:50,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:50,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769357345] [2021-07-09 18:13:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:50,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:50,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769357345] [2021-07-09 18:13:50,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769357345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:50,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293632629] [2021-07-09 18:13:50,829 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:50,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:50,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:50,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:13:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:51,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:51,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:51,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:51,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:51,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:51,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:51,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:51,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:13:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:51,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293632629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:51,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:51,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:51,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066898639] [2021-07-09 18:13:51,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:51,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:51,383 INFO L87 Difference]: Start difference. First operand 1764 states and 3594 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:53,253 INFO L93 Difference]: Finished difference Result 1963 states and 3963 transitions. [2021-07-09 18:13:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:13:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:53,255 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:13:53,255 INFO L226 Difference]: Without dead ends: 1907 [2021-07-09 18:13:53,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1721.5ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:13:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-07-09 18:13:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1759. [2021-07-09 18:13:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 2.0386803185437996) internal successors, (3584), 1758 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 3584 transitions. [2021-07-09 18:13:53,270 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 3584 transitions. Word has length 40 [2021-07-09 18:13:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 3584 transitions. [2021-07-09 18:13:53,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 3584 transitions. [2021-07-09 18:13:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:53,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:53,272 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:53,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-09 18:13:53,472 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1044789061, now seen corresponding path program 213 times [2021-07-09 18:13:53,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:53,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155789922] [2021-07-09 18:13:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:53,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155789922] [2021-07-09 18:13:53,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155789922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:53,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183670475] [2021-07-09 18:13:53,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:53,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:13:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:53,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:13:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:54,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:54,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:54,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:54,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:54,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:54,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183670475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:54,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:54,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:13:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468348458] [2021-07-09 18:13:54,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:13:54,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:54,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:13:54,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:13:54,479 INFO L87 Difference]: Start difference. First operand 1759 states and 3584 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:56,661 INFO L93 Difference]: Finished difference Result 1995 states and 4014 transitions. [2021-07-09 18:13:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:13:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:13:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:56,663 INFO L225 Difference]: With dead ends: 1995 [2021-07-09 18:13:56,663 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 18:13:56,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1987.1ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:13:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 18:13:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1780. [2021-07-09 18:13:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038785834738617) internal successors, (3627), 1779 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3627 transitions. [2021-07-09 18:13:56,679 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3627 transitions. Word has length 40 [2021-07-09 18:13:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:56,679 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3627 transitions. [2021-07-09 18:13:56,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3627 transitions. [2021-07-09 18:13:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:13:56,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:56,680 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:56,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 18:13:56,881 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 373224455, now seen corresponding path program 214 times [2021-07-09 18:13:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:56,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571985868] [2021-07-09 18:13:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:57,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571985868] [2021-07-09 18:13:57,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571985868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:57,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694085630] [2021-07-09 18:13:57,250 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:57,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:57,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:57,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:57,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:57,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:13:57,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:57,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:57,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:57,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:13:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:57,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694085630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:57,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:57,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:13:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496633001] [2021-07-09 18:13:57,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:13:57,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:13:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:57,818 INFO L87 Difference]: Start difference. First operand 1780 states and 3627 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:00,268 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-07-09 18:14:00,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:14:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:00,270 INFO L225 Difference]: With dead ends: 1992 [2021-07-09 18:14:00,271 INFO L226 Difference]: Without dead ends: 1896 [2021-07-09 18:14:00,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2149.1ms TimeCoverageRelationStatistics Valid=416, Invalid=5134, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:14:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-09 18:14:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1781. [2021-07-09 18:14:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-07-09 18:14:00,286 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-07-09 18:14:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:00,286 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-07-09 18:14:00,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-07-09 18:14:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:00,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:00,288 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:00,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-07-09 18:14:00,488 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1758847045, now seen corresponding path program 215 times [2021-07-09 18:14:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:00,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009722409] [2021-07-09 18:14:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:00,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009722409] [2021-07-09 18:14:00,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009722409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181367497] [2021-07-09 18:14:00,864 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:00,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:14:00,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:14:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:01,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:01,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:01,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:01,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:01,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:01,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:01,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:14:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:01,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181367497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:01,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:01,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:01,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637395767] [2021-07-09 18:14:01,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:01,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:01,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:01,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:01,437 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:04,148 INFO L93 Difference]: Finished difference Result 2068 states and 4169 transitions. [2021-07-09 18:14:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:14:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:04,150 INFO L225 Difference]: With dead ends: 2068 [2021-07-09 18:14:04,150 INFO L226 Difference]: Without dead ends: 1980 [2021-07-09 18:14:04,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2257.2ms TimeCoverageRelationStatistics Valid=432, Invalid=5268, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:14:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-09 18:14:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1786. [2021-07-09 18:14:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.038655462184874) internal successors, (3639), 1785 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3639 transitions. [2021-07-09 18:14:04,166 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3639 transitions. Word has length 40 [2021-07-09 18:14:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:04,166 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 3639 transitions. [2021-07-09 18:14:04,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3639 transitions. [2021-07-09 18:14:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:04,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:04,167 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-09 18:14:04,368 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1117736455, now seen corresponding path program 216 times [2021-07-09 18:14:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910616984] [2021-07-09 18:14:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:04,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910616984] [2021-07-09 18:14:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910616984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413273463] [2021-07-09 18:14:04,736 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:04,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:14:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:04,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:05,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:05,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:05,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:05,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:05,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:05,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:05,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:05,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:05,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413273463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:05,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:05,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:05,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98210186] [2021-07-09 18:14:05,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:05,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:05,325 INFO L87 Difference]: Start difference. First operand 1786 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:08,066 INFO L93 Difference]: Finished difference Result 2098 states and 4232 transitions. [2021-07-09 18:14:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:14:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:08,068 INFO L225 Difference]: With dead ends: 2098 [2021-07-09 18:14:08,068 INFO L226 Difference]: Without dead ends: 2034 [2021-07-09 18:14:08,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2253.4ms TimeCoverageRelationStatistics Valid=496, Invalid=5666, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:14:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-09 18:14:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1787. [2021-07-09 18:14:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.038633818589026) internal successors, (3641), 1786 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3641 transitions. [2021-07-09 18:14:08,086 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3641 transitions. Word has length 40 [2021-07-09 18:14:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:08,086 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3641 transitions. [2021-07-09 18:14:08,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3641 transitions. [2021-07-09 18:14:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:08,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:08,088 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:08,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:08,289 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1750988475, now seen corresponding path program 217 times [2021-07-09 18:14:08,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:08,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578660610] [2021-07-09 18:14:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578660610] [2021-07-09 18:14:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578660610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285742592] [2021-07-09 18:14:08,687 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:08,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:08,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:09,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:09,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:09,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:09,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:09,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:09,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:09,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285742592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:09,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:09,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:09,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822114573] [2021-07-09 18:14:09,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:09,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:09,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:09,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:09,259 INFO L87 Difference]: Start difference. First operand 1787 states and 3641 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:12,686 INFO L93 Difference]: Finished difference Result 2196 states and 4427 transitions. [2021-07-09 18:14:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:14:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:12,688 INFO L225 Difference]: With dead ends: 2196 [2021-07-09 18:14:12,689 INFO L226 Difference]: Without dead ends: 2124 [2021-07-09 18:14:12,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2664.6ms TimeCoverageRelationStatistics Valid=608, Invalid=7402, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:14:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-07-09 18:14:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1778. [2021-07-09 18:14:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.0382667416994935) internal successors, (3622), 1777 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 3622 transitions. [2021-07-09 18:14:12,705 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 3622 transitions. Word has length 40 [2021-07-09 18:14:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:12,705 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 3622 transitions. [2021-07-09 18:14:12,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 3622 transitions. [2021-07-09 18:14:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:12,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:12,706 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:12,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:12,907 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 128351249, now seen corresponding path program 218 times [2021-07-09 18:14:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:12,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367666181] [2021-07-09 18:14:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367666181] [2021-07-09 18:14:13,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367666181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:13,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005465845] [2021-07-09 18:14:13,275 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:13,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:13,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:14:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:13,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:13,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:13,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:13,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:14:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:13,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005465845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:13,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:13,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:13,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914096974] [2021-07-09 18:14:13,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:13,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:13,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:13,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:13,892 INFO L87 Difference]: Start difference. First operand 1778 states and 3622 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:15,848 INFO L93 Difference]: Finished difference Result 1974 states and 3983 transitions. [2021-07-09 18:14:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:14:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:15,850 INFO L225 Difference]: With dead ends: 1974 [2021-07-09 18:14:15,850 INFO L226 Difference]: Without dead ends: 1918 [2021-07-09 18:14:15,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1821.9ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:14:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-07-09 18:14:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1771. [2021-07-09 18:14:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 2.0384180790960453) internal successors, (3608), 1770 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 3608 transitions. [2021-07-09 18:14:15,866 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 3608 transitions. Word has length 40 [2021-07-09 18:14:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:15,866 INFO L482 AbstractCegarLoop]: Abstraction has 1771 states and 3608 transitions. [2021-07-09 18:14:15,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 3608 transitions. [2021-07-09 18:14:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:15,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:15,868 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:16,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:16,069 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:16,069 INFO L82 PathProgramCache]: Analyzing trace with hash -970685053, now seen corresponding path program 219 times [2021-07-09 18:14:16,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:16,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009986889] [2021-07-09 18:14:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:16,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009986889] [2021-07-09 18:14:16,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009986889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:16,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80449821] [2021-07-09 18:14:16,451 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:16,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:14:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:16,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:16,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:16,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:16,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:16,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:16,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:16,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:17,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80449821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:17,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:17,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:17,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997312439] [2021-07-09 18:14:17,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:17,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:17,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:17,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:17,021 INFO L87 Difference]: Start difference. First operand 1771 states and 3608 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:19,172 INFO L93 Difference]: Finished difference Result 1994 states and 4013 transitions. [2021-07-09 18:14:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:14:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:19,174 INFO L225 Difference]: With dead ends: 1994 [2021-07-09 18:14:19,174 INFO L226 Difference]: Without dead ends: 1898 [2021-07-09 18:14:19,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1836.8ms TimeCoverageRelationStatistics Valid=346, Invalid=4346, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:14:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-07-09 18:14:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1781. [2021-07-09 18:14:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-07-09 18:14:19,195 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-07-09 18:14:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:19,195 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-07-09 18:14:19,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-07-09 18:14:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:19,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:19,197 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:19,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:19,397 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:19,398 INFO L82 PathProgramCache]: Analyzing trace with hash 414937537, now seen corresponding path program 220 times [2021-07-09 18:14:19,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:19,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067578485] [2021-07-09 18:14:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:19,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067578485] [2021-07-09 18:14:19,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067578485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:19,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511847338] [2021-07-09 18:14:19,765 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:19,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:19,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:20,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:20,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:20,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:20,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:20,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:20,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:20,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511847338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:20,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:20,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904782009] [2021-07-09 18:14:20,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:20,326 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:22,522 INFO L93 Difference]: Finished difference Result 2038 states and 4107 transitions. [2021-07-09 18:14:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:14:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:22,525 INFO L225 Difference]: With dead ends: 2038 [2021-07-09 18:14:22,525 INFO L226 Difference]: Without dead ends: 1950 [2021-07-09 18:14:22,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1901.4ms TimeCoverageRelationStatistics Valid=365, Invalid=4465, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:14:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-07-09 18:14:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1784. [2021-07-09 18:14:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.0381379697139654) internal successors, (3634), 1783 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3634 transitions. [2021-07-09 18:14:22,541 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3634 transitions. Word has length 40 [2021-07-09 18:14:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:22,541 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 3634 transitions. [2021-07-09 18:14:22,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3634 transitions. [2021-07-09 18:14:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:22,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:22,543 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:22,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:22,743 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash -226173053, now seen corresponding path program 221 times [2021-07-09 18:14:22,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:22,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719993391] [2021-07-09 18:14:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:23,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:23,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719993391] [2021-07-09 18:14:23,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719993391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:23,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444419449] [2021-07-09 18:14:23,130 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:23,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:14:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:23,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:23,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:23,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:23,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:23,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:14:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:23,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444419449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:23,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:23,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:14:23,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193141851] [2021-07-09 18:14:23,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:14:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:23,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:14:23,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:14:23,767 INFO L87 Difference]: Start difference. First operand 1784 states and 3634 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:25,985 INFO L93 Difference]: Finished difference Result 2044 states and 4120 transitions. [2021-07-09 18:14:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:14:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:25,987 INFO L225 Difference]: With dead ends: 2044 [2021-07-09 18:14:25,987 INFO L226 Difference]: Without dead ends: 1980 [2021-07-09 18:14:25,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2066.4ms TimeCoverageRelationStatistics Valid=474, Invalid=5226, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:14:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-09 18:14:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1785. [2021-07-09 18:14:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.0381165919282513) internal successors, (3636), 1784 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3636 transitions. [2021-07-09 18:14:26,003 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3636 transitions. Word has length 40 [2021-07-09 18:14:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:26,004 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 3636 transitions. [2021-07-09 18:14:26,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3636 transitions. [2021-07-09 18:14:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:26,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:26,005 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:26,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 18:14:26,209 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:26,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1200069313, now seen corresponding path program 222 times [2021-07-09 18:14:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:26,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756012378] [2021-07-09 18:14:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:26,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756012378] [2021-07-09 18:14:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756012378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648325327] [2021-07-09 18:14:26,586 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:26,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:14:26,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:14:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:26,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:26,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:26,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:26,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:14:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:27,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648325327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:27,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:27,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:27,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001757568] [2021-07-09 18:14:27,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:27,132 INFO L87 Difference]: Start difference. First operand 1785 states and 3636 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:30,038 INFO L93 Difference]: Finished difference Result 2151 states and 4329 transitions. [2021-07-09 18:14:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:14:30,038 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:30,041 INFO L225 Difference]: With dead ends: 2151 [2021-07-09 18:14:30,041 INFO L226 Difference]: Without dead ends: 2067 [2021-07-09 18:14:30,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2371.0ms TimeCoverageRelationStatistics Valid=612, Invalid=6870, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:14:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-09 18:14:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1787. [2021-07-09 18:14:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.0375139977603585) internal successors, (3639), 1786 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3639 transitions. [2021-07-09 18:14:30,059 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3639 transitions. Word has length 40 [2021-07-09 18:14:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:30,059 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3639 transitions. [2021-07-09 18:14:30,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3639 transitions. [2021-07-09 18:14:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:30,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:30,061 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:30,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 18:14:30,277 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:30,277 INFO L82 PathProgramCache]: Analyzing trace with hash 285436567, now seen corresponding path program 223 times [2021-07-09 18:14:30,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:30,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544631773] [2021-07-09 18:14:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:30,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:30,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544631773] [2021-07-09 18:14:30,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544631773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:30,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217435623] [2021-07-09 18:14:30,648 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:30,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:30,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:30,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:30,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:30,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:30,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:30,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-09 18:14:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:31,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217435623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:31,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:31,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:31,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314403133] [2021-07-09 18:14:31,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:31,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:31,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:31,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:31,173 INFO L87 Difference]: Start difference. First operand 1787 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:33,281 INFO L93 Difference]: Finished difference Result 1991 states and 4013 transitions. [2021-07-09 18:14:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:14:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:33,283 INFO L225 Difference]: With dead ends: 1991 [2021-07-09 18:14:33,283 INFO L226 Difference]: Without dead ends: 1935 [2021-07-09 18:14:33,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1809.7ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:14:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-07-09 18:14:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1780. [2021-07-09 18:14:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038223721191681) internal successors, (3626), 1779 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3626 transitions. [2021-07-09 18:14:33,298 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3626 transitions. Word has length 40 [2021-07-09 18:14:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:33,298 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3626 transitions. [2021-07-09 18:14:33,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3626 transitions. [2021-07-09 18:14:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:33,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:33,300 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:33,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-09 18:14:33,501 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash 573735085, now seen corresponding path program 224 times [2021-07-09 18:14:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:33,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662324280] [2021-07-09 18:14:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:33,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662324280] [2021-07-09 18:14:33,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662324280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:33,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512102394] [2021-07-09 18:14:33,867 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:33,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:33,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:33,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:33,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:34,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:34,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:34,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:34,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:34,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512102394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:34,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:34,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:34,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236407220] [2021-07-09 18:14:34,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:34,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:34,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:34,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:34,448 INFO L87 Difference]: Start difference. First operand 1780 states and 3626 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:37,307 INFO L93 Difference]: Finished difference Result 2047 states and 4123 transitions. [2021-07-09 18:14:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:14:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:37,310 INFO L225 Difference]: With dead ends: 2047 [2021-07-09 18:14:37,310 INFO L226 Difference]: Without dead ends: 1927 [2021-07-09 18:14:37,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 2410.7ms TimeCoverageRelationStatistics Valid=449, Invalid=6193, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:14:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-07-09 18:14:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1806. [2021-07-09 18:14:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.0398891966759) internal successors, (3682), 1805 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 3682 transitions. [2021-07-09 18:14:37,325 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 3682 transitions. Word has length 40 [2021-07-09 18:14:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:37,325 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 3682 transitions. [2021-07-09 18:14:37,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 3682 transitions. [2021-07-09 18:14:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:37,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:37,327 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:37,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 18:14:37,527 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -97829521, now seen corresponding path program 225 times [2021-07-09 18:14:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:37,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327844825] [2021-07-09 18:14:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:37,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:37,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327844825] [2021-07-09 18:14:37,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327844825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:37,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807298245] [2021-07-09 18:14:37,903 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:37,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:14:37,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:14:37,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:38,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:38,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:38,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:38,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:14:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807298245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:38,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:38,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685877877] [2021-07-09 18:14:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:38,477 INFO L87 Difference]: Start difference. First operand 1806 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:41,658 INFO L93 Difference]: Finished difference Result 2042 states and 4116 transitions. [2021-07-09 18:14:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:14:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:41,660 INFO L225 Difference]: With dead ends: 2042 [2021-07-09 18:14:41,661 INFO L226 Difference]: Without dead ends: 1946 [2021-07-09 18:14:41,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2480.0ms TimeCoverageRelationStatistics Valid=495, Invalid=6311, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:14:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-07-09 18:14:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1807. [2021-07-09 18:14:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 2.039313399778516) internal successors, (3683), 1806 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3683 transitions. [2021-07-09 18:14:41,676 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3683 transitions. Word has length 40 [2021-07-09 18:14:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:41,676 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 3683 transitions. [2021-07-09 18:14:41,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3683 transitions. [2021-07-09 18:14:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:41,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:41,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:41,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-09 18:14:41,879 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1287793069, now seen corresponding path program 226 times [2021-07-09 18:14:41,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:41,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812985645] [2021-07-09 18:14:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:42,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:42,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812985645] [2021-07-09 18:14:42,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812985645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:42,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700658144] [2021-07-09 18:14:42,248 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:42,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:42,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:42,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:42,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:42,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:42,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:42,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:42,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700658144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:42,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:42,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:42,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369053281] [2021-07-09 18:14:42,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:42,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:42,808 INFO L87 Difference]: Start difference. First operand 1807 states and 3683 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:46,155 INFO L93 Difference]: Finished difference Result 2095 states and 4226 transitions. [2021-07-09 18:14:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:14:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:46,157 INFO L225 Difference]: With dead ends: 2095 [2021-07-09 18:14:46,158 INFO L226 Difference]: Without dead ends: 2007 [2021-07-09 18:14:46,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2626.2ms TimeCoverageRelationStatistics Valid=529, Invalid=6611, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:14:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-07-09 18:14:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1812. [2021-07-09 18:14:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0381004969630037) internal successors, (3691), 1811 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3691 transitions. [2021-07-09 18:14:46,173 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3691 transitions. Word has length 40 [2021-07-09 18:14:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:46,173 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3691 transitions. [2021-07-09 18:14:46,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3691 transitions. [2021-07-09 18:14:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:46,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:46,175 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:46,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-09 18:14:46,376 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:46,376 INFO L82 PathProgramCache]: Analyzing trace with hash 646682479, now seen corresponding path program 227 times [2021-07-09 18:14:46,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:46,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721957767] [2021-07-09 18:14:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721957767] [2021-07-09 18:14:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721957767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5808509] [2021-07-09 18:14:46,780 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:46,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:14:46,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:14:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:47,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:47,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:47,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:47,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:14:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:47,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5808509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:47,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:47,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:47,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477864861] [2021-07-09 18:14:47,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:47,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:47,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:47,316 INFO L87 Difference]: Start difference. First operand 1812 states and 3691 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:50,596 INFO L93 Difference]: Finished difference Result 2121 states and 4280 transitions. [2021-07-09 18:14:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:14:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:50,599 INFO L225 Difference]: With dead ends: 2121 [2021-07-09 18:14:50,599 INFO L226 Difference]: Without dead ends: 2057 [2021-07-09 18:14:50,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 2592.4ms TimeCoverageRelationStatistics Valid=593, Invalid=6889, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:14:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-07-09 18:14:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1813. [2021-07-09 18:14:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0380794701986753) internal successors, (3693), 1812 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3693 transitions. [2021-07-09 18:14:50,616 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3693 transitions. Word has length 40 [2021-07-09 18:14:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:50,616 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3693 transitions. [2021-07-09 18:14:50,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3693 transitions. [2021-07-09 18:14:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:50,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:50,618 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:50,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:50,818 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2072924845, now seen corresponding path program 228 times [2021-07-09 18:14:50,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:50,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62221732] [2021-07-09 18:14:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:51,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62221732] [2021-07-09 18:14:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62221732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:51,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692346642] [2021-07-09 18:14:51,194 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:51,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:14:51,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:51,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:14:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:51,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-09 18:14:51,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:51,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:51,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:51,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-07-09 18:14:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:51,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692346642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:51,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:51,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-09 18:14:51,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575930213] [2021-07-09 18:14:51,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:14:51,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:51,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:14:51,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:14:51,937 INFO L87 Difference]: Start difference. First operand 1813 states and 3693 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:56,366 INFO L93 Difference]: Finished difference Result 2222 states and 4477 transitions. [2021-07-09 18:14:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:14:56,366 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:56,369 INFO L225 Difference]: With dead ends: 2222 [2021-07-09 18:14:56,369 INFO L226 Difference]: Without dead ends: 2148 [2021-07-09 18:14:56,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 3328.4ms TimeCoverageRelationStatistics Valid=706, Invalid=9194, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:14:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-07-09 18:14:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1812. [2021-07-09 18:14:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0392048591938154) internal successors, (3693), 1811 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3693 transitions. [2021-07-09 18:14:56,386 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3693 transitions. Word has length 40 [2021-07-09 18:14:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:56,386 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3693 transitions. [2021-07-09 18:14:56,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3693 transitions. [2021-07-09 18:14:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:56,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:56,388 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:56,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:56,588 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1022987885, now seen corresponding path program 229 times [2021-07-09 18:14:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997996629] [2021-07-09 18:14:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:56,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:56,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997996629] [2021-07-09 18:14:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997996629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:56,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883004270] [2021-07-09 18:14:56,954 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:56,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:14:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:57,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:57,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:14:57,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:57,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:57,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:57,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:14:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883004270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:57,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:14:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606235314] [2021-07-09 18:14:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:14:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:14:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:14:57,558 INFO L87 Difference]: Start difference. First operand 1812 states and 3693 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:59,694 INFO L93 Difference]: Finished difference Result 2007 states and 4046 transitions. [2021-07-09 18:14:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:14:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:14:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:59,696 INFO L225 Difference]: With dead ends: 2007 [2021-07-09 18:14:59,696 INFO L226 Difference]: Without dead ends: 1922 [2021-07-09 18:14:59,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1943.9ms TimeCoverageRelationStatistics Valid=358, Invalid=4612, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:14:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-07-09 18:14:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1819. [2021-07-09 18:14:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-07-09 18:14:59,712 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-07-09 18:14:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:59,712 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-07-09 18:14:59,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-07-09 18:14:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:14:59,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:59,714 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:59,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:59,914 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1664098475, now seen corresponding path program 230 times [2021-07-09 18:14:59,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:59,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385050550] [2021-07-09 18:14:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:00,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:00,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385050550] [2021-07-09 18:15:00,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385050550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:00,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339323740] [2021-07-09 18:15:00,303 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:00,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:00,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:00,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:00,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:00,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:00,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:00,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339323740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:00,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:00,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098445278] [2021-07-09 18:15:00,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:00,867 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:03,044 INFO L93 Difference]: Finished difference Result 2009 states and 4052 transitions. [2021-07-09 18:15:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:15:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:03,046 INFO L225 Difference]: With dead ends: 2009 [2021-07-09 18:15:03,046 INFO L226 Difference]: Without dead ends: 1948 [2021-07-09 18:15:03,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2009.9ms TimeCoverageRelationStatistics Valid=411, Invalid=4701, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:15:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-07-09 18:15:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1813. [2021-07-09 18:15:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0375275938189845) internal successors, (3692), 1812 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3692 transitions. [2021-07-09 18:15:03,063 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3692 transitions. Word has length 40 [2021-07-09 18:15:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3692 transitions. [2021-07-09 18:15:03,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3692 transitions. [2021-07-09 18:15:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:03,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:03,065 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:03,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-09 18:15:03,265 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1490840907, now seen corresponding path program 231 times [2021-07-09 18:15:03,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:03,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619227328] [2021-07-09 18:15:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:03,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619227328] [2021-07-09 18:15:03,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619227328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666424863] [2021-07-09 18:15:03,673 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:03,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:15:03,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:03,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:04,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:04,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:04,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:04,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-09 18:15:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:04,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666424863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:04,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:04,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796506756] [2021-07-09 18:15:04,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:04,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:04,247 INFO L87 Difference]: Start difference. First operand 1813 states and 3692 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:06,255 INFO L93 Difference]: Finished difference Result 2006 states and 4046 transitions. [2021-07-09 18:15:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:15:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:06,258 INFO L225 Difference]: With dead ends: 2006 [2021-07-09 18:15:06,258 INFO L226 Difference]: Without dead ends: 1945 [2021-07-09 18:15:06,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1887.6ms TimeCoverageRelationStatistics Valid=374, Invalid=4738, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:15:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-09 18:15:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1808. [2021-07-09 18:15:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 2.0376314333148864) internal successors, (3682), 1807 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3682 transitions. [2021-07-09 18:15:06,281 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3682 transitions. Word has length 40 [2021-07-09 18:15:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:06,281 INFO L482 AbstractCegarLoop]: Abstraction has 1808 states and 3682 transitions. [2021-07-09 18:15:06,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3682 transitions. [2021-07-09 18:15:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:06,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:06,282 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:06,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:06,485 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash -342702727, now seen corresponding path program 232 times [2021-07-09 18:15:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:06,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163596264] [2021-07-09 18:15:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163596264] [2021-07-09 18:15:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163596264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794966701] [2021-07-09 18:15:06,847 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:06,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:06,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:07,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:07,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:07,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:07,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:07,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-09 18:15:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:07,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794966701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:07,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:07,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793739278] [2021-07-09 18:15:07,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:07,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:07,405 INFO L87 Difference]: Start difference. First operand 1808 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:09,540 INFO L93 Difference]: Finished difference Result 1999 states and 4032 transitions. [2021-07-09 18:15:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:15:09,540 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:09,542 INFO L225 Difference]: With dead ends: 1999 [2021-07-09 18:15:09,542 INFO L226 Difference]: Without dead ends: 1943 [2021-07-09 18:15:09,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1920.5ms TimeCoverageRelationStatistics Valid=373, Invalid=5029, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:15:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-07-09 18:15:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1804. [2021-07-09 18:15:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 2.0377149195784803) internal successors, (3674), 1803 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3674 transitions. [2021-07-09 18:15:09,558 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3674 transitions. Word has length 40 [2021-07-09 18:15:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:09,558 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 3674 transitions. [2021-07-09 18:15:09,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3674 transitions. [2021-07-09 18:15:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:09,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:09,560 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:09,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-09 18:15:09,761 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1441739029, now seen corresponding path program 233 times [2021-07-09 18:15:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:09,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133306104] [2021-07-09 18:15:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133306104] [2021-07-09 18:15:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133306104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426619953] [2021-07-09 18:15:10,140 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:10,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:15:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:10,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:15:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:10,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:10,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:10,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:10,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:10,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:15:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:10,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426619953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:10,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:10,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:10,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553257580] [2021-07-09 18:15:10,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:10,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:10,716 INFO L87 Difference]: Start difference. First operand 1804 states and 3674 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:13,463 INFO L93 Difference]: Finished difference Result 2056 states and 4142 transitions. [2021-07-09 18:15:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:15:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:13,465 INFO L225 Difference]: With dead ends: 2056 [2021-07-09 18:15:13,465 INFO L226 Difference]: Without dead ends: 1960 [2021-07-09 18:15:13,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2154.7ms TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:15:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-07-09 18:15:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1816. [2021-07-09 18:15:13,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.0391184573002756) internal successors, (3701), 1815 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3701 transitions. [2021-07-09 18:15:13,482 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3701 transitions. Word has length 40 [2021-07-09 18:15:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:13,482 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 3701 transitions. [2021-07-09 18:15:13,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3701 transitions. [2021-07-09 18:15:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:13,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:13,483 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:13,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:13,684 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -56116439, now seen corresponding path program 234 times [2021-07-09 18:15:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:13,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413098358] [2021-07-09 18:15:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:14,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413098358] [2021-07-09 18:15:14,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413098358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869982649] [2021-07-09 18:15:14,056 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:14,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:15:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:15:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:14,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:14,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:14,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:14,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:14,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:15:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869982649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:14,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:14,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965032406] [2021-07-09 18:15:14,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:14,628 INFO L87 Difference]: Start difference. First operand 1816 states and 3701 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:17,522 INFO L93 Difference]: Finished difference Result 2078 states and 4190 transitions. [2021-07-09 18:15:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:15:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:17,524 INFO L225 Difference]: With dead ends: 2078 [2021-07-09 18:15:17,524 INFO L226 Difference]: Without dead ends: 1990 [2021-07-09 18:15:17,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2268.7ms TimeCoverageRelationStatistics Valid=449, Invalid=5557, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:15:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-07-09 18:15:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1819. [2021-07-09 18:15:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-07-09 18:15:17,541 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-07-09 18:15:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:17,541 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-07-09 18:15:17,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-07-09 18:15:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:17,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:17,543 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:17,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:17,744 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash -697227029, now seen corresponding path program 235 times [2021-07-09 18:15:17,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:17,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249017248] [2021-07-09 18:15:17,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:18,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249017248] [2021-07-09 18:15:18,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249017248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636165737] [2021-07-09 18:15:18,137 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:18,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:18,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:18,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:18,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:18,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:18,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:18,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636165737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:18,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:18,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:18,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080378794] [2021-07-09 18:15:18,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:18,698 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:21,522 INFO L93 Difference]: Finished difference Result 2083 states and 4199 transitions. [2021-07-09 18:15:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:15:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:21,524 INFO L225 Difference]: With dead ends: 2083 [2021-07-09 18:15:21,524 INFO L226 Difference]: Without dead ends: 2019 [2021-07-09 18:15:21,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2263.8ms TimeCoverageRelationStatistics Valid=540, Invalid=5940, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:15:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-07-09 18:15:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1820. [2021-07-09 18:15:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 2.0373831775700935) internal successors, (3706), 1819 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 3706 transitions. [2021-07-09 18:15:21,541 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 3706 transitions. Word has length 40 [2021-07-09 18:15:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:21,541 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 3706 transitions. [2021-07-09 18:15:21,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 3706 transitions. [2021-07-09 18:15:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:21,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:21,542 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:21,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-07-09 18:15:21,743 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:21,743 INFO L82 PathProgramCache]: Analyzing trace with hash 729015337, now seen corresponding path program 236 times [2021-07-09 18:15:21,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:21,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959273283] [2021-07-09 18:15:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:22,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959273283] [2021-07-09 18:15:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959273283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850050254] [2021-07-09 18:15:22,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:22,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:22,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:22,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:22,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850050254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:22,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223852761] [2021-07-09 18:15:22,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:22,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:22,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:22,678 INFO L87 Difference]: Start difference. First operand 1820 states and 3706 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:26,461 INFO L93 Difference]: Finished difference Result 2198 states and 4421 transitions. [2021-07-09 18:15:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:15:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:26,464 INFO L225 Difference]: With dead ends: 2198 [2021-07-09 18:15:26,464 INFO L226 Difference]: Without dead ends: 2111 [2021-07-09 18:15:26,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 2818.4ms TimeCoverageRelationStatistics Valid=733, Invalid=8579, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:15:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-07-09 18:15:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1822. [2021-07-09 18:15:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 2.0367929708951125) internal successors, (3709), 1821 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3709 transitions. [2021-07-09 18:15:26,482 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3709 transitions. Word has length 40 [2021-07-09 18:15:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:26,482 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 3709 transitions. [2021-07-09 18:15:26,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3709 transitions. [2021-07-09 18:15:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:26,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:26,484 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:26,684 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -185617409, now seen corresponding path program 237 times [2021-07-09 18:15:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863147128] [2021-07-09 18:15:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:27,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:27,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863147128] [2021-07-09 18:15:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863147128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:27,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230895906] [2021-07-09 18:15:27,062 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:27,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:15:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:27,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:15:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:27,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:27,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:27,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:27,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:15:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230895906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:27,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:27,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:27,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753795823] [2021-07-09 18:15:27,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:27,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:27,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:27,577 INFO L87 Difference]: Start difference. First operand 1822 states and 3709 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:30,045 INFO L93 Difference]: Finished difference Result 2059 states and 4148 transitions. [2021-07-09 18:15:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:15:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:30,048 INFO L225 Difference]: With dead ends: 2059 [2021-07-09 18:15:30,048 INFO L226 Difference]: Without dead ends: 2000 [2021-07-09 18:15:30,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2099.1ms TimeCoverageRelationStatistics Valid=476, Invalid=6166, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:15:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-07-09 18:15:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1810. [2021-07-09 18:15:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.0375898286346046) internal successors, (3686), 1809 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3686 transitions. [2021-07-09 18:15:30,065 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3686 transitions. Word has length 40 [2021-07-09 18:15:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:30,065 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3686 transitions. [2021-07-09 18:15:30,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3686 transitions. [2021-07-09 18:15:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:30,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:30,067 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:30,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:30,267 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash -945367575, now seen corresponding path program 238 times [2021-07-09 18:15:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:30,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354760215] [2021-07-09 18:15:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354760215] [2021-07-09 18:15:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354760215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727208104] [2021-07-09 18:15:30,679 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:30,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:30,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:31,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:31,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:31,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:31,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727208104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:31,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:31,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:31,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955131419] [2021-07-09 18:15:31,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:31,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:31,259 INFO L87 Difference]: Start difference. First operand 1810 states and 3686 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:34,224 INFO L93 Difference]: Finished difference Result 2103 states and 4238 transitions. [2021-07-09 18:15:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:15:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:34,226 INFO L225 Difference]: With dead ends: 2103 [2021-07-09 18:15:34,226 INFO L226 Difference]: Without dead ends: 2007 [2021-07-09 18:15:34,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2486.4ms TimeCoverageRelationStatistics Valid=531, Invalid=7301, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:15:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-07-09 18:15:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1833. [2021-07-09 18:15:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.0398471615720526) internal successors, (3737), 1832 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 3737 transitions. [2021-07-09 18:15:34,244 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 3737 transitions. Word has length 40 [2021-07-09 18:15:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:34,244 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 3737 transitions. [2021-07-09 18:15:34,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 3737 transitions. [2021-07-09 18:15:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:34,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:34,246 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:34,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:34,446 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 440255015, now seen corresponding path program 239 times [2021-07-09 18:15:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:34,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57826178] [2021-07-09 18:15:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:34,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:34,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57826178] [2021-07-09 18:15:34,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57826178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:34,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447582892] [2021-07-09 18:15:34,830 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:34,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:15:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:34,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:34,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:35,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:35,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:15:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:35,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447582892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:35,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:35,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:15:35,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870481488] [2021-07-09 18:15:35,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:15:35,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:15:35,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:15:35,445 INFO L87 Difference]: Start difference. First operand 1833 states and 3737 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:38,881 INFO L93 Difference]: Finished difference Result 2150 states and 4339 transitions. [2021-07-09 18:15:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:15:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:38,884 INFO L225 Difference]: With dead ends: 2150 [2021-07-09 18:15:38,884 INFO L226 Difference]: Without dead ends: 2062 [2021-07-09 18:15:38,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2719.7ms TimeCoverageRelationStatistics Valid=621, Invalid=8309, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 18:15:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-07-09 18:15:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1836. [2021-07-09 18:15:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 2.0397820163487737) internal successors, (3743), 1835 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 3743 transitions. [2021-07-09 18:15:38,901 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 3743 transitions. Word has length 40 [2021-07-09 18:15:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:38,901 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 3743 transitions. [2021-07-09 18:15:38,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 3743 transitions. [2021-07-09 18:15:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:38,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:38,902 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:39,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:39,103 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash -200855575, now seen corresponding path program 240 times [2021-07-09 18:15:39,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:39,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590593156] [2021-07-09 18:15:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:39,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:39,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590593156] [2021-07-09 18:15:39,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590593156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:39,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385614886] [2021-07-09 18:15:39,489 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:39,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:15:39,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:15:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:39,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:39,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:39,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:39,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:39,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:39,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:15:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:40,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385614886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:40,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:40,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:40,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921085179] [2021-07-09 18:15:40,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:40,018 INFO L87 Difference]: Start difference. First operand 1836 states and 3743 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:44,013 INFO L93 Difference]: Finished difference Result 2178 states and 4394 transitions. [2021-07-09 18:15:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:15:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:44,015 INFO L225 Difference]: With dead ends: 2178 [2021-07-09 18:15:44,015 INFO L226 Difference]: Without dead ends: 2114 [2021-07-09 18:15:44,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 2927.0ms TimeCoverageRelationStatistics Valid=791, Invalid=9921, Unknown=0, NotChecked=0, Total=10712 [2021-07-09 18:15:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-07-09 18:15:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1837. [2021-07-09 18:15:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.039760348583878) internal successors, (3745), 1836 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 3745 transitions. [2021-07-09 18:15:44,032 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 3745 transitions. Word has length 40 [2021-07-09 18:15:44,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:44,033 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 3745 transitions. [2021-07-09 18:15:44,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 3745 transitions. [2021-07-09 18:15:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:44,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:44,034 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:44,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-09 18:15:44,235 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1225386791, now seen corresponding path program 241 times [2021-07-09 18:15:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:44,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214075519] [2021-07-09 18:15:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:44,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214075519] [2021-07-09 18:15:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214075519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656520836] [2021-07-09 18:15:44,624 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:44,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:44,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:44,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:44,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:44,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:44,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656520836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:45,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:45,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:45,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120113287] [2021-07-09 18:15:45,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:45,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:45,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:45,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:45,146 INFO L87 Difference]: Start difference. First operand 1837 states and 3745 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:49,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:49,793 INFO L93 Difference]: Finished difference Result 2368 states and 4762 transitions. [2021-07-09 18:15:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:15:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:49,795 INFO L225 Difference]: With dead ends: 2368 [2021-07-09 18:15:49,796 INFO L226 Difference]: Without dead ends: 2278 [2021-07-09 18:15:49,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 3437.3ms TimeCoverageRelationStatistics Valid=962, Invalid=13080, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:15:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-07-09 18:15:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1842. [2021-07-09 18:15:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 2.0391091797935905) internal successors, (3754), 1841 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 3754 transitions. [2021-07-09 18:15:49,814 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 3754 transitions. Word has length 40 [2021-07-09 18:15:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:49,814 INFO L482 AbstractCegarLoop]: Abstraction has 1842 states and 3754 transitions. [2021-07-09 18:15:49,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 3754 transitions. [2021-07-09 18:15:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:49,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:49,816 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:50,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:50,016 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 310754045, now seen corresponding path program 242 times [2021-07-09 18:15:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:50,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611018701] [2021-07-09 18:15:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:50,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:50,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611018701] [2021-07-09 18:15:50,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611018701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:50,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851034758] [2021-07-09 18:15:50,400 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:50,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:50,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:15:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:50,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:50,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:50,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:50,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:15:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:50,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851034758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:50,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:50,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:50,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881878799] [2021-07-09 18:15:50,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:50,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:50,936 INFO L87 Difference]: Start difference. First operand 1842 states and 3754 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:53,659 INFO L93 Difference]: Finished difference Result 2097 states and 4227 transitions. [2021-07-09 18:15:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:15:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:53,662 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:15:53,662 INFO L226 Difference]: Without dead ends: 2041 [2021-07-09 18:15:53,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2069.8ms TimeCoverageRelationStatistics Valid=443, Invalid=6199, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:15:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-09 18:15:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1824. [2021-07-09 18:15:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.040043883708173) internal successors, (3719), 1823 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3719 transitions. [2021-07-09 18:15:53,679 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3719 transitions. Word has length 40 [2021-07-09 18:15:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:53,679 INFO L482 AbstractCegarLoop]: Abstraction has 1824 states and 3719 transitions. [2021-07-09 18:15:53,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3719 transitions. [2021-07-09 18:15:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:53,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:53,680 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:53,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-09 18:15:53,881 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:53,881 INFO L82 PathProgramCache]: Analyzing trace with hash 314170323, now seen corresponding path program 243 times [2021-07-09 18:15:53,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:53,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89961863] [2021-07-09 18:15:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:54,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89961863] [2021-07-09 18:15:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89961863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424372916] [2021-07-09 18:15:54,281 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:54,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:15:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:54,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:15:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:54,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:54,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:54,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:54,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:54,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:54,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424372916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:54,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:54,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-09 18:15:54,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741640100] [2021-07-09 18:15:54,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:15:54,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:15:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:15:54,863 INFO L87 Difference]: Start difference. First operand 1824 states and 3719 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:57,999 INFO L93 Difference]: Finished difference Result 2110 states and 4255 transitions. [2021-07-09 18:15:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:15:58,000 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:15:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:58,002 INFO L225 Difference]: With dead ends: 2110 [2021-07-09 18:15:58,002 INFO L226 Difference]: Without dead ends: 2022 [2021-07-09 18:15:58,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2473.9ms TimeCoverageRelationStatistics Valid=499, Invalid=7157, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:15:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-09 18:15:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1863. [2021-07-09 18:15:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.0408163265306123) internal successors, (3800), 1862 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3800 transitions. [2021-07-09 18:15:58,019 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3800 transitions. Word has length 40 [2021-07-09 18:15:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:58,019 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 3800 transitions. [2021-07-09 18:15:58,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3800 transitions. [2021-07-09 18:15:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:15:58,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:58,021 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:58,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-09 18:15:58,221 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -326940267, now seen corresponding path program 244 times [2021-07-09 18:15:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:58,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885058412] [2021-07-09 18:15:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:58,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:58,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885058412] [2021-07-09 18:15:58,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885058412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:58,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826684951] [2021-07-09 18:15:58,623 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:58,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:58,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:58,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:58,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:58,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:15:58,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:58,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:58,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:58,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:15:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826684951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:59,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:59,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-09 18:15:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519142120] [2021-07-09 18:15:59,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:59,143 INFO L87 Difference]: Start difference. First operand 1863 states and 3800 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:02,372 INFO L93 Difference]: Finished difference Result 2124 states and 4289 transitions. [2021-07-09 18:16:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:16:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:02,374 INFO L225 Difference]: With dead ends: 2124 [2021-07-09 18:16:02,374 INFO L226 Difference]: Without dead ends: 2060 [2021-07-09 18:16:02,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 2323.7ms TimeCoverageRelationStatistics Valid=506, Invalid=7150, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:16:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-07-09 18:16:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1877. [2021-07-09 18:16:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.041044776119403) internal successors, (3829), 1876 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3829 transitions. [2021-07-09 18:16:02,391 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3829 transitions. Word has length 40 [2021-07-09 18:16:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:02,391 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 3829 transitions. [2021-07-09 18:16:02,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3829 transitions. [2021-07-09 18:16:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:02,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:02,393 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:02,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:02,597 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:02,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1099302099, now seen corresponding path program 245 times [2021-07-09 18:16:02,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:02,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244398177] [2021-07-09 18:16:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:02,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:02,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244398177] [2021-07-09 18:16:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244398177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:02,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175350409] [2021-07-09 18:16:02,990 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:03,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:16:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:03,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:03,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:03,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:16:03,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:03,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:03,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:03,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:16:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175350409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-09 18:16:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79798939] [2021-07-09 18:16:03,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:16:03,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:16:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:16:03,567 INFO L87 Difference]: Start difference. First operand 1877 states and 3829 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:07,393 INFO L93 Difference]: Finished difference Result 2198 states and 4424 transitions. [2021-07-09 18:16:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:16:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:07,396 INFO L225 Difference]: With dead ends: 2198 [2021-07-09 18:16:07,396 INFO L226 Difference]: Without dead ends: 2120 [2021-07-09 18:16:07,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 2644.0ms TimeCoverageRelationStatistics Valid=640, Invalid=9260, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:16:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-09 18:16:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1876. [2021-07-09 18:16:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.0405333333333333) internal successors, (3826), 1875 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3826 transitions. [2021-07-09 18:16:07,414 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3826 transitions. Word has length 40 [2021-07-09 18:16:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:07,415 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 3826 transitions. [2021-07-09 18:16:07,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3826 transitions. [2021-07-09 18:16:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:07,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:07,416 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:07,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-07-09 18:16:07,617 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash 994455481, now seen corresponding path program 246 times [2021-07-09 18:16:07,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:07,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905196118] [2021-07-09 18:16:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:08,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:08,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905196118] [2021-07-09 18:16:08,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905196118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:08,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272201880] [2021-07-09 18:16:08,020 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:08,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:16:08,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:08,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-09 18:16:08,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2021-07-09 18:16:08,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:08,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:10 [2021-07-09 18:16:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:08,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272201880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:08,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:08,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-07-09 18:16:08,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453115741] [2021-07-09 18:16:08,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:16:08,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:16:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:16:08,942 INFO L87 Difference]: Start difference. First operand 1876 states and 3826 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:13,184 INFO L93 Difference]: Finished difference Result 2144 states and 4327 transitions. [2021-07-09 18:16:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:16:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:13,186 INFO L225 Difference]: With dead ends: 2144 [2021-07-09 18:16:13,187 INFO L226 Difference]: Without dead ends: 2080 [2021-07-09 18:16:13,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 3225.4ms TimeCoverageRelationStatistics Valid=545, Invalid=7645, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:16:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-07-09 18:16:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1891. [2021-07-09 18:16:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 2.043915343915344) internal successors, (3863), 1890 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 3863 transitions. [2021-07-09 18:16:13,205 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 3863 transitions. Word has length 40 [2021-07-09 18:16:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:13,205 INFO L482 AbstractCegarLoop]: Abstraction has 1891 states and 3863 transitions. [2021-07-09 18:16:13,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 3863 transitions. [2021-07-09 18:16:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:13,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:13,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:13,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:13,408 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1041343209, now seen corresponding path program 247 times [2021-07-09 18:16:13,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:13,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660840580] [2021-07-09 18:16:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:13,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660840580] [2021-07-09 18:16:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660840580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289905912] [2021-07-09 18:16:13,774 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:13,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:14,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:14,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:14,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:14,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:14,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:14,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:14,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:14,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289905912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:14,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:14,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:14,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471018784] [2021-07-09 18:16:14,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:14,403 INFO L87 Difference]: Start difference. First operand 1891 states and 3863 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:15,902 INFO L93 Difference]: Finished difference Result 2091 states and 4219 transitions. [2021-07-09 18:16:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:16:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:15,905 INFO L225 Difference]: With dead ends: 2091 [2021-07-09 18:16:15,905 INFO L226 Difference]: Without dead ends: 2027 [2021-07-09 18:16:15,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1408.6ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:16:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-09 18:16:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1906. [2021-07-09 18:16:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 2.0451443569553804) internal successors, (3896), 1905 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3896 transitions. [2021-07-09 18:16:15,921 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3896 transitions. Word has length 40 [2021-07-09 18:16:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 3896 transitions. [2021-07-09 18:16:15,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3896 transitions. [2021-07-09 18:16:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:15,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:15,923 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:16,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-09 18:16:16,124 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1575048665, now seen corresponding path program 248 times [2021-07-09 18:16:16,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:16,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96011885] [2021-07-09 18:16:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:16,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96011885] [2021-07-09 18:16:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96011885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:16,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134812871] [2021-07-09 18:16:16,490 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:16,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:16,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:16,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:16,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:17,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:17,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:17,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134812871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:17,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:17,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513361750] [2021-07-09 18:16:17,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:17,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:17,134 INFO L87 Difference]: Start difference. First operand 1906 states and 3896 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:18,683 INFO L93 Difference]: Finished difference Result 2128 states and 4286 transitions. [2021-07-09 18:16:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:16:18,684 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:18,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:18,686 INFO L225 Difference]: With dead ends: 2128 [2021-07-09 18:16:18,686 INFO L226 Difference]: Without dead ends: 2064 [2021-07-09 18:16:18,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1446.3ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:16:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-07-09 18:16:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1907. [2021-07-09 18:16:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.0451206715634838) internal successors, (3898), 1906 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3898 transitions. [2021-07-09 18:16:18,703 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3898 transitions. Word has length 40 [2021-07-09 18:16:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:18,703 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 3898 transitions. [2021-07-09 18:16:18,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3898 transitions. [2021-07-09 18:16:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:18,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:18,705 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:18,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:18,905 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:18,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1988883223, now seen corresponding path program 249 times [2021-07-09 18:16:18,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:18,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734620680] [2021-07-09 18:16:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:19,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:19,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734620680] [2021-07-09 18:16:19,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734620680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:19,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53823423] [2021-07-09 18:16:19,296 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:19,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:16:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:19,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:16:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:19,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:19,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:19,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:19,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:19,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:19,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53823423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:19,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:19,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-07-09 18:16:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607586293] [2021-07-09 18:16:19,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:16:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:16:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:16:19,928 INFO L87 Difference]: Start difference. First operand 1907 states and 3898 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:22,749 INFO L93 Difference]: Finished difference Result 2312 states and 4641 transitions. [2021-07-09 18:16:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:16:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:22,752 INFO L225 Difference]: With dead ends: 2312 [2021-07-09 18:16:22,752 INFO L226 Difference]: Without dead ends: 2180 [2021-07-09 18:16:22,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2355.5ms TimeCoverageRelationStatistics Valid=438, Invalid=6042, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:16:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-07-09 18:16:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1933. [2021-07-09 18:16:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.046583850931677) internal successors, (3954), 1932 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3954 transitions. [2021-07-09 18:16:22,769 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3954 transitions. Word has length 40 [2021-07-09 18:16:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:22,769 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 3954 transitions. [2021-07-09 18:16:22,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:22,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3954 transitions. [2021-07-09 18:16:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:22,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:22,771 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:22,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:22,974 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:22,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1317318617, now seen corresponding path program 250 times [2021-07-09 18:16:22,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:22,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598851441] [2021-07-09 18:16:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:23,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598851441] [2021-07-09 18:16:23,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598851441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:23,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19426931] [2021-07-09 18:16:23,335 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:23,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:23,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:23,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:23,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:23,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:23,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:23,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:23,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:23,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:23,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19426931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:23,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:23,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910947189] [2021-07-09 18:16:23,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:23,964 INFO L87 Difference]: Start difference. First operand 1933 states and 3954 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:25,843 INFO L93 Difference]: Finished difference Result 2224 states and 4483 transitions. [2021-07-09 18:16:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:16:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:25,846 INFO L225 Difference]: With dead ends: 2224 [2021-07-09 18:16:25,847 INFO L226 Difference]: Without dead ends: 2163 [2021-07-09 18:16:25,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1586.5ms TimeCoverageRelationStatistics Valid=272, Invalid=3510, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:16:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-09 18:16:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1932. [2021-07-09 18:16:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.0466079751424133) internal successors, (3952), 1931 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 3952 transitions. [2021-07-09 18:16:25,868 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 3952 transitions. Word has length 40 [2021-07-09 18:16:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:25,868 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 3952 transitions. [2021-07-09 18:16:25,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 3952 transitions. [2021-07-09 18:16:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:25,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:25,870 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:26,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:26,072 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:26,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1592026089, now seen corresponding path program 251 times [2021-07-09 18:16:26,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:26,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004937489] [2021-07-09 18:16:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:26,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004937489] [2021-07-09 18:16:26,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004937489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:26,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961640293] [2021-07-09 18:16:26,444 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:26,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:16:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:26,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:26,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:26,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:26,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:26,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:26,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:26,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:27,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961640293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:27,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:27,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189272421] [2021-07-09 18:16:27,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:27,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:27,092 INFO L87 Difference]: Start difference. First operand 1932 states and 3952 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:29,171 INFO L93 Difference]: Finished difference Result 2264 states and 4568 transitions. [2021-07-09 18:16:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:16:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:29,174 INFO L225 Difference]: With dead ends: 2264 [2021-07-09 18:16:29,174 INFO L226 Difference]: Without dead ends: 2216 [2021-07-09 18:16:29,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1802.4ms TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:16:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-07-09 18:16:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1936. [2021-07-09 18:16:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 2.046511627906977) internal successors, (3960), 1935 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 3960 transitions. [2021-07-09 18:16:29,192 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 3960 transitions. Word has length 40 [2021-07-09 18:16:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:29,192 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 3960 transitions. [2021-07-09 18:16:29,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 3960 transitions. [2021-07-09 18:16:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:29,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:29,194 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:29,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:29,395 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2061830617, now seen corresponding path program 252 times [2021-07-09 18:16:29,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:29,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112358524] [2021-07-09 18:16:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:29,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:29,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112358524] [2021-07-09 18:16:29,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112358524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:29,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700219152] [2021-07-09 18:16:29,763 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:29,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:16:29,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:29,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:16:29,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:30,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:30,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:16:30,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:30,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:30,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:30,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:16:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:30,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700219152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:30,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:30,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:30,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754308276] [2021-07-09 18:16:30,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:30,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:30,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:30,361 INFO L87 Difference]: Start difference. First operand 1936 states and 3960 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:32,523 INFO L93 Difference]: Finished difference Result 2294 states and 4630 transitions. [2021-07-09 18:16:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:16:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:32,526 INFO L225 Difference]: With dead ends: 2294 [2021-07-09 18:16:32,526 INFO L226 Difference]: Without dead ends: 2262 [2021-07-09 18:16:32,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1790.1ms TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:16:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-09 18:16:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1937. [2021-07-09 18:16:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.0464876033057853) internal successors, (3962), 1936 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3962 transitions. [2021-07-09 18:16:32,544 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3962 transitions. Word has length 40 [2021-07-09 18:16:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:32,544 INFO L482 AbstractCegarLoop]: Abstraction has 1937 states and 3962 transitions. [2021-07-09 18:16:32,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3962 transitions. [2021-07-09 18:16:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:32,545 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:32,545 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:32,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-09 18:16:32,751 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:32,752 INFO L82 PathProgramCache]: Analyzing trace with hash -806894313, now seen corresponding path program 253 times [2021-07-09 18:16:32,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:32,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72184411] [2021-07-09 18:16:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:33,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72184411] [2021-07-09 18:16:33,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72184411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202214071] [2021-07-09 18:16:33,112 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:33,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:33,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:33,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:33,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:33,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:33,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202214071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:33,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:33,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:33,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615450492] [2021-07-09 18:16:33,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:33,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:33,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:33,717 INFO L87 Difference]: Start difference. First operand 1937 states and 3962 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:36,096 INFO L93 Difference]: Finished difference Result 2370 states and 4777 transitions. [2021-07-09 18:16:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:16:36,096 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:36,098 INFO L225 Difference]: With dead ends: 2370 [2021-07-09 18:16:36,099 INFO L226 Difference]: Without dead ends: 2326 [2021-07-09 18:16:36,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1965.7ms TimeCoverageRelationStatistics Valid=381, Invalid=5021, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:16:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-07-09 18:16:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1929. [2021-07-09 18:16:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 2.0451244813278007) internal successors, (3943), 1928 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3943 transitions. [2021-07-09 18:16:36,116 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3943 transitions. Word has length 40 [2021-07-09 18:16:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:36,117 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 3943 transitions. [2021-07-09 18:16:36,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3943 transitions. [2021-07-09 18:16:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:36,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:36,118 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:36,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-09 18:16:36,319 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:36,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1668306179, now seen corresponding path program 254 times [2021-07-09 18:16:36,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:36,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785723750] [2021-07-09 18:16:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:36,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785723750] [2021-07-09 18:16:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785723750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:36,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274134248] [2021-07-09 18:16:36,673 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:36,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:36,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:16:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:37,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:37,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:37,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:16:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:37,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274134248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:37,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:37,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:37,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022397886] [2021-07-09 18:16:37,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:37,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:37,272 INFO L87 Difference]: Start difference. First operand 1929 states and 3943 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,633 INFO L93 Difference]: Finished difference Result 2132 states and 4333 transitions. [2021-07-09 18:16:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:16:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,635 INFO L225 Difference]: With dead ends: 2132 [2021-07-09 18:16:38,635 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 18:16:38,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1410.6ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:16:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 18:16:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1924. [2021-07-09 18:16:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.045241809672387) internal successors, (3933), 1923 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 3933 transitions. [2021-07-09 18:16:38,652 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 3933 transitions. Word has length 40 [2021-07-09 18:16:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,652 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 3933 transitions. [2021-07-09 18:16:38,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 3933 transitions. [2021-07-09 18:16:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:38,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,653 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 18:16:38,854 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash -73691179, now seen corresponding path program 255 times [2021-07-09 18:16:38,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168605864] [2021-07-09 18:16:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168605864] [2021-07-09 18:16:39,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168605864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305182415] [2021-07-09 18:16:39,215 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:16:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:39,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:39,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:39,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:39,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:39,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:39,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305182415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:39,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240113938] [2021-07-09 18:16:39,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:39,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:39,841 INFO L87 Difference]: Start difference. First operand 1924 states and 3933 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:41,671 INFO L93 Difference]: Finished difference Result 2145 states and 4329 transitions. [2021-07-09 18:16:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:16:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:41,673 INFO L225 Difference]: With dead ends: 2145 [2021-07-09 18:16:41,674 INFO L226 Difference]: Without dead ends: 2017 [2021-07-09 18:16:41,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1767.9ms TimeCoverageRelationStatistics Valid=325, Invalid=4505, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:16:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-07-09 18:16:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1938. [2021-07-09 18:16:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.0464636035105834) internal successors, (3964), 1937 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3964 transitions. [2021-07-09 18:16:41,690 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3964 transitions. Word has length 40 [2021-07-09 18:16:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:41,691 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 3964 transitions. [2021-07-09 18:16:41,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3964 transitions. [2021-07-09 18:16:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:41,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:41,692 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:41,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 18:16:41,893 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 340143379, now seen corresponding path program 256 times [2021-07-09 18:16:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801486582] [2021-07-09 18:16:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:42,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:42,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801486582] [2021-07-09 18:16:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801486582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791292036] [2021-07-09 18:16:42,264 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:42,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:42,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:42,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:42,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:42,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:42,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:42,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:42,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:42,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791292036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:42,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:42,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44993501] [2021-07-09 18:16:42,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:42,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:42,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:42,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:42,874 INFO L87 Difference]: Start difference. First operand 1938 states and 3964 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:45,146 INFO L93 Difference]: Finished difference Result 2187 states and 4419 transitions. [2021-07-09 18:16:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:16:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:45,149 INFO L225 Difference]: With dead ends: 2187 [2021-07-09 18:16:45,149 INFO L226 Difference]: Without dead ends: 2064 [2021-07-09 18:16:45,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1932.8ms TimeCoverageRelationStatistics Valid=359, Invalid=4611, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:16:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-07-09 18:16:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1941. [2021-07-09 18:16:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.044845360824742) internal successors, (3967), 1940 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3967 transitions. [2021-07-09 18:16:45,166 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3967 transitions. Word has length 40 [2021-07-09 18:16:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:45,166 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 3967 transitions. [2021-07-09 18:16:45,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3967 transitions. [2021-07-09 18:16:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:45,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:45,168 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:45,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-09 18:16:45,368 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash -331421227, now seen corresponding path program 257 times [2021-07-09 18:16:45,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:45,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51647923] [2021-07-09 18:16:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:45,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51647923] [2021-07-09 18:16:45,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51647923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:45,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933984914] [2021-07-09 18:16:45,735 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:45,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:16:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:16:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:46,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:46,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:16:46,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:46,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:46,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:46,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:16:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:46,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933984914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:46,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:46,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493033719] [2021-07-09 18:16:46,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:46,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:46,340 INFO L87 Difference]: Start difference. First operand 1941 states and 3967 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:48,606 INFO L93 Difference]: Finished difference Result 2196 states and 4438 transitions. [2021-07-09 18:16:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:16:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:48,608 INFO L225 Difference]: With dead ends: 2196 [2021-07-09 18:16:48,608 INFO L226 Difference]: Without dead ends: 2100 [2021-07-09 18:16:48,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1893.4ms TimeCoverageRelationStatistics Valid=390, Invalid=4580, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:16:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-07-09 18:16:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1942. [2021-07-09 18:16:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.044822256568779) internal successors, (3969), 1941 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3969 transitions. [2021-07-09 18:16:48,625 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3969 transitions. Word has length 40 [2021-07-09 18:16:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:48,625 INFO L482 AbstractCegarLoop]: Abstraction has 1942 states and 3969 transitions. [2021-07-09 18:16:48,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3969 transitions. [2021-07-09 18:16:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:48,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:48,627 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:48,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:48,827 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1054201363, now seen corresponding path program 258 times [2021-07-09 18:16:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:48,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660364295] [2021-07-09 18:16:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:49,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660364295] [2021-07-09 18:16:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660364295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141745051] [2021-07-09 18:16:49,191 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:49,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:16:49,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:49,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:16:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:49,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:49,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:49,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:49,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:49,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:49,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141745051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:49,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:49,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-07-09 18:16:49,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010439659] [2021-07-09 18:16:49,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:16:49,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:16:49,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:16:49,812 INFO L87 Difference]: Start difference. First operand 1942 states and 3969 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:52,529 INFO L93 Difference]: Finished difference Result 2314 states and 4677 transitions. [2021-07-09 18:16:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:16:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:52,531 INFO L225 Difference]: With dead ends: 2314 [2021-07-09 18:16:52,531 INFO L226 Difference]: Without dead ends: 2226 [2021-07-09 18:16:52,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2315.5ms TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:16:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-07-09 18:16:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1956. [2021-07-09 18:16:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 2.0465473145780053) internal successors, (4001), 1955 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 4001 transitions. [2021-07-09 18:16:52,549 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 4001 transitions. Word has length 40 [2021-07-09 18:16:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:52,549 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 4001 transitions. [2021-07-09 18:16:52,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 4001 transitions. [2021-07-09 18:16:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:52,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:52,551 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:52,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-09 18:16:52,751 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash 413090773, now seen corresponding path program 259 times [2021-07-09 18:16:52,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697180002] [2021-07-09 18:16:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:53,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697180002] [2021-07-09 18:16:53,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697180002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:53,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234649831] [2021-07-09 18:16:53,122 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:53,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:53,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:53,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:53,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:53,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:53,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:53,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:53,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234649831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:53,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:53,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:53,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270803001] [2021-07-09 18:16:53,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:53,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:53,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:53,717 INFO L87 Difference]: Start difference. First operand 1956 states and 4001 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:56,420 INFO L93 Difference]: Finished difference Result 2340 states and 4735 transitions. [2021-07-09 18:16:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:16:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:16:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:56,423 INFO L225 Difference]: With dead ends: 2340 [2021-07-09 18:16:56,423 INFO L226 Difference]: Without dead ends: 2263 [2021-07-09 18:16:56,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2179.3ms TimeCoverageRelationStatistics Valid=477, Invalid=5375, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:16:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-07-09 18:16:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1966. [2021-07-09 18:16:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 2.0483460559796436) internal successors, (4025), 1965 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 4025 transitions. [2021-07-09 18:16:56,445 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 4025 transitions. Word has length 40 [2021-07-09 18:16:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:56,445 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 4025 transitions. [2021-07-09 18:16:56,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 4025 transitions. [2021-07-09 18:16:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:16:56,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:56,447 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:56,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-09 18:16:56,647 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1839333139, now seen corresponding path program 260 times [2021-07-09 18:16:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:56,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34369657] [2021-07-09 18:16:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34369657] [2021-07-09 18:16:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34369657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681562952] [2021-07-09 18:16:57,022 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:57,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:57,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:57,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:16:57,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:57,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:57,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:57,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:16:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681562952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:57,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:16:57,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601743597] [2021-07-09 18:16:57,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:16:57,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:16:57,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:16:57,616 INFO L87 Difference]: Start difference. First operand 1966 states and 4025 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,617 INFO L93 Difference]: Finished difference Result 2414 states and 4889 transitions. [2021-07-09 18:17:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:17:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,620 INFO L225 Difference]: With dead ends: 2414 [2021-07-09 18:17:00,620 INFO L226 Difference]: Without dead ends: 2342 [2021-07-09 18:17:00,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2400.2ms TimeCoverageRelationStatistics Valid=544, Invalid=6428, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:17:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-07-09 18:17:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1953. [2021-07-09 18:17:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.0466188524590163) internal successors, (3995), 1952 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3995 transitions. [2021-07-09 18:17:00,642 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3995 transitions. Word has length 40 [2021-07-09 18:17:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,642 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 3995 transitions. [2021-07-09 18:17:00,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3995 transitions. [2021-07-09 18:17:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:00,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,644 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,844 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1814437583, now seen corresponding path program 261 times [2021-07-09 18:17:00,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966729218] [2021-07-09 18:17:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966729218] [2021-07-09 18:17:01,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966729218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444687390] [2021-07-09 18:17:01,215 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:01,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:01,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:01,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:17:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:01,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:01,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:17:01,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:01,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:01,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:01,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-07-09 18:17:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444687390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:01,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:01,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80274116] [2021-07-09 18:17:01,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:01,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:01,796 INFO L87 Difference]: Start difference. First operand 1953 states and 3995 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:03,751 INFO L93 Difference]: Finished difference Result 2145 states and 4351 transitions. [2021-07-09 18:17:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:17:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:03,753 INFO L225 Difference]: With dead ends: 2145 [2021-07-09 18:17:03,753 INFO L226 Difference]: Without dead ends: 2089 [2021-07-09 18:17:03,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1806.8ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:17:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-09 18:17:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1948. [2021-07-09 18:17:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.046738572162301) internal successors, (3985), 1947 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3985 transitions. [2021-07-09 18:17:03,770 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3985 transitions. Word has length 40 [2021-07-09 18:17:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:03,770 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 3985 transitions. [2021-07-09 18:17:03,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3985 transitions. [2021-07-09 18:17:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:03,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:03,772 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:03,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-07-09 18:17:03,973 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash -191281321, now seen corresponding path program 262 times [2021-07-09 18:17:03,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:03,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565057901] [2021-07-09 18:17:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:04,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565057901] [2021-07-09 18:17:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565057901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785402214] [2021-07-09 18:17:04,344 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:04,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:04,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:04,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:04,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:04,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:04,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785402214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:04,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103888629] [2021-07-09 18:17:04,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:04,978 INFO L87 Difference]: Start difference. First operand 1948 states and 3985 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:07,649 INFO L93 Difference]: Finished difference Result 2187 states and 4423 transitions. [2021-07-09 18:17:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:17:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:07,651 INFO L225 Difference]: With dead ends: 2187 [2021-07-09 18:17:07,651 INFO L226 Difference]: Without dead ends: 2067 [2021-07-09 18:17:07,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2154.8ms TimeCoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:17:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-09 18:17:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1977. [2021-07-09 18:17:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 2.0445344129554655) internal successors, (4040), 1976 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 4040 transitions. [2021-07-09 18:17:07,670 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 4040 transitions. Word has length 40 [2021-07-09 18:17:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:07,670 INFO L482 AbstractCegarLoop]: Abstraction has 1977 states and 4040 transitions. [2021-07-09 18:17:07,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 4040 transitions. [2021-07-09 18:17:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:07,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:07,672 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:07,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:07,872 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash -862845927, now seen corresponding path program 263 times [2021-07-09 18:17:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:07,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890178360] [2021-07-09 18:17:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:08,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890178360] [2021-07-09 18:17:08,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890178360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181144187] [2021-07-09 18:17:08,270 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:08,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:17:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:08,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:08,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:08,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:17:08,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:08,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:08,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:08,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:17:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181144187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:08,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:08,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483530801] [2021-07-09 18:17:08,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:08,886 INFO L87 Difference]: Start difference. First operand 1977 states and 4040 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:11,369 INFO L93 Difference]: Finished difference Result 2193 states and 4436 transitions. [2021-07-09 18:17:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:17:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:11,372 INFO L225 Difference]: With dead ends: 2193 [2021-07-09 18:17:11,372 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:17:11,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2264.9ms TimeCoverageRelationStatistics Valid=447, Invalid=5405, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:17:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:17:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1974. [2021-07-09 18:17:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.0446021287379623) internal successors, (4034), 1973 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 4034 transitions. [2021-07-09 18:17:11,390 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 4034 transitions. Word has length 40 [2021-07-09 18:17:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:11,390 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 4034 transitions. [2021-07-09 18:17:11,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 4034 transitions. [2021-07-09 18:17:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:11,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:11,392 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:11,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-07-09 18:17:11,592 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash 522776663, now seen corresponding path program 264 times [2021-07-09 18:17:11,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:11,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800769134] [2021-07-09 18:17:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800769134] [2021-07-09 18:17:11,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800769134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148391811] [2021-07-09 18:17:11,964 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:11,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:11,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:17:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:12,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:12,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:12,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:12,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:12,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:12,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148391811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:12,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2021-07-09 18:17:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764012911] [2021-07-09 18:17:12,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:17:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:17:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:17:12,711 INFO L87 Difference]: Start difference. First operand 1974 states and 4034 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:15,782 INFO L93 Difference]: Finished difference Result 2272 states and 4601 transitions. [2021-07-09 18:17:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:17:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:15,785 INFO L225 Difference]: With dead ends: 2272 [2021-07-09 18:17:15,785 INFO L226 Difference]: Without dead ends: 2184 [2021-07-09 18:17:15,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2518.9ms TimeCoverageRelationStatistics Valid=547, Invalid=6593, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:17:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-07-09 18:17:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1964. [2021-07-09 18:17:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.0448293428425877) internal successors, (4014), 1963 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 4014 transitions. [2021-07-09 18:17:15,802 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 4014 transitions. Word has length 40 [2021-07-09 18:17:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:15,802 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 4014 transitions. [2021-07-09 18:17:15,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 4014 transitions. [2021-07-09 18:17:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:15,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:15,804 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:16,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-09 18:17:16,005 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -118333927, now seen corresponding path program 265 times [2021-07-09 18:17:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:16,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263553421] [2021-07-09 18:17:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263553421] [2021-07-09 18:17:16,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263553421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638920080] [2021-07-09 18:17:16,376 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:16,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:16,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:16,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:16,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:16,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:16,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638920080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823796335] [2021-07-09 18:17:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:16,958 INFO L87 Difference]: Start difference. First operand 1964 states and 4014 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:19,737 INFO L93 Difference]: Finished difference Result 2294 states and 4646 transitions. [2021-07-09 18:17:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:17:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:19,740 INFO L225 Difference]: With dead ends: 2294 [2021-07-09 18:17:19,740 INFO L226 Difference]: Without dead ends: 2230 [2021-07-09 18:17:19,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2445.5ms TimeCoverageRelationStatistics Valid=585, Invalid=6387, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:17:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-09 18:17:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1968. [2021-07-09 18:17:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 2.044738179969497) internal successors, (4022), 1967 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 4022 transitions. [2021-07-09 18:17:19,759 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 4022 transitions. Word has length 40 [2021-07-09 18:17:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:19,759 INFO L482 AbstractCegarLoop]: Abstraction has 1968 states and 4022 transitions. [2021-07-09 18:17:19,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 4022 transitions. [2021-07-09 18:17:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:19,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:19,761 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:19,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:19,962 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1307908439, now seen corresponding path program 266 times [2021-07-09 18:17:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:19,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674887966] [2021-07-09 18:17:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:20,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674887966] [2021-07-09 18:17:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674887966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672847623] [2021-07-09 18:17:20,321 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:20,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:20,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:20,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:20,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:20,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:20,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:20,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:20,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:20,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:20,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:20,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:20,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672847623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:20,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:20,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:20,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981243538] [2021-07-09 18:17:20,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:20,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:20,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:20,903 INFO L87 Difference]: Start difference. First operand 1968 states and 4022 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:24,592 INFO L93 Difference]: Finished difference Result 2397 states and 4852 transitions. [2021-07-09 18:17:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:17:24,592 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:24,595 INFO L225 Difference]: With dead ends: 2397 [2021-07-09 18:17:24,595 INFO L226 Difference]: Without dead ends: 2325 [2021-07-09 18:17:24,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 2855.4ms TimeCoverageRelationStatistics Valid=721, Invalid=8591, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:17:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-07-09 18:17:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1958. [2021-07-09 18:17:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.044455799693408) internal successors, (4001), 1957 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4001 transitions. [2021-07-09 18:17:24,613 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4001 transitions. Word has length 40 [2021-07-09 18:17:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:24,613 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 4001 transitions. [2021-07-09 18:17:24,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4001 transitions. [2021-07-09 18:17:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:24,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:24,614 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:24,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-09 18:17:24,815 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:24,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:24,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1107719133, now seen corresponding path program 267 times [2021-07-09 18:17:24,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:24,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853930037] [2021-07-09 18:17:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:25,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853930037] [2021-07-09 18:17:25,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853930037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:25,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637376241] [2021-07-09 18:17:25,189 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:25,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:25,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:25,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,704 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-09 18:17:25,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 18:17:25,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:25,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:25,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:25,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:24 [2021-07-09 18:17:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637376241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:26,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-07-09 18:17:26,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169303295] [2021-07-09 18:17:26,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:17:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:26,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:17:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:17:26,071 INFO L87 Difference]: Start difference. First operand 1958 states and 4001 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:29,186 INFO L93 Difference]: Finished difference Result 2160 states and 4375 transitions. [2021-07-09 18:17:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:17:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:29,189 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 18:17:29,189 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 18:17:29,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2694.0ms TimeCoverageRelationStatistics Valid=416, Invalid=6064, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:17:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 18:17:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1943. [2021-07-09 18:17:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 2.044799176107106) internal successors, (3971), 1942 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3971 transitions. [2021-07-09 18:17:29,206 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3971 transitions. Word has length 40 [2021-07-09 18:17:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:29,206 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 3971 transitions. [2021-07-09 18:17:29,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3971 transitions. [2021-07-09 18:17:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:29,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:29,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:29,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:29,408 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash 2088211861, now seen corresponding path program 268 times [2021-07-09 18:17:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152033633] [2021-07-09 18:17:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:29,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:29,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152033633] [2021-07-09 18:17:29,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152033633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:29,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803999777] [2021-07-09 18:17:29,785 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:29,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:29,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:30,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:30,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:30,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:30,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:30,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:30,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:30,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803999777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:30,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:30,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:30,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792613288] [2021-07-09 18:17:30,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:30,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:30,392 INFO L87 Difference]: Start difference. First operand 1943 states and 3971 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:32,376 INFO L93 Difference]: Finished difference Result 2164 states and 4371 transitions. [2021-07-09 18:17:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:17:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:32,379 INFO L225 Difference]: With dead ends: 2164 [2021-07-09 18:17:32,379 INFO L226 Difference]: Without dead ends: 2068 [2021-07-09 18:17:32,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1866.1ms TimeCoverageRelationStatistics Valid=353, Invalid=4617, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:17:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-07-09 18:17:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1961. [2021-07-09 18:17:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.044387755102041) internal successors, (4007), 1960 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 4007 transitions. [2021-07-09 18:17:32,395 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 4007 transitions. Word has length 40 [2021-07-09 18:17:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:32,395 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 4007 transitions. [2021-07-09 18:17:32,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 4007 transitions. [2021-07-09 18:17:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:32,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:32,397 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:32,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:32,598 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash -821132845, now seen corresponding path program 269 times [2021-07-09 18:17:32,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:32,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666836460] [2021-07-09 18:17:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:32,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:32,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666836460] [2021-07-09 18:17:32,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666836460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:32,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084632531] [2021-07-09 18:17:32,980 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:33,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:33,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:33,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:17:33,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:33,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:17:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:33,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084632531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:33,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:33,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-07-09 18:17:33,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134350662] [2021-07-09 18:17:33,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-09 18:17:33,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-09 18:17:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:17:33,644 INFO L87 Difference]: Start difference. First operand 1961 states and 4007 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:35,661 INFO L93 Difference]: Finished difference Result 2198 states and 4445 transitions. [2021-07-09 18:17:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:17:35,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:35,664 INFO L225 Difference]: With dead ends: 2198 [2021-07-09 18:17:35,664 INFO L226 Difference]: Without dead ends: 2110 [2021-07-09 18:17:35,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1941.1ms TimeCoverageRelationStatistics Valid=381, Invalid=4875, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:17:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-07-09 18:17:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1961. [2021-07-09 18:17:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.044387755102041) internal successors, (4007), 1960 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 4007 transitions. [2021-07-09 18:17:35,682 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 4007 transitions. Word has length 40 [2021-07-09 18:17:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:35,682 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 4007 transitions. [2021-07-09 18:17:35,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 4007 transitions. [2021-07-09 18:17:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:35,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:35,684 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:35,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:35,884 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:35,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1462243435, now seen corresponding path program 270 times [2021-07-09 18:17:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:35,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846447670] [2021-07-09 18:17:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:36,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:36,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846447670] [2021-07-09 18:17:36,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846447670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912602579] [2021-07-09 18:17:36,251 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:36,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:17:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:17:36,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:36,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:17:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:36,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912602579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:36,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:36,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542216504] [2021-07-09 18:17:36,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:36,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:36,814 INFO L87 Difference]: Start difference. First operand 1961 states and 4007 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:38,698 INFO L93 Difference]: Finished difference Result 2202 states and 4455 transitions. [2021-07-09 18:17:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:17:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:38,701 INFO L225 Difference]: With dead ends: 2202 [2021-07-09 18:17:38,701 INFO L226 Difference]: Without dead ends: 2138 [2021-07-09 18:17:38,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1860.1ms TimeCoverageRelationStatistics Valid=423, Invalid=4979, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:17:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-07-09 18:17:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1965. [2021-07-09 18:17:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.044297352342159) internal successors, (4015), 1964 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 4015 transitions. [2021-07-09 18:17:38,718 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 4015 transitions. Word has length 40 [2021-07-09 18:17:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:38,718 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 4015 transitions. [2021-07-09 18:17:38,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 4015 transitions. [2021-07-09 18:17:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:38,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:38,720 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-09 18:17:38,920 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -36001069, now seen corresponding path program 271 times [2021-07-09 18:17:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:38,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36122425] [2021-07-09 18:17:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36122425] [2021-07-09 18:17:39,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36122425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24163661] [2021-07-09 18:17:39,298 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:39,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:39,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:39,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:39,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24163661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:39,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982282261] [2021-07-09 18:17:39,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:39,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:39,876 INFO L87 Difference]: Start difference. First operand 1965 states and 4015 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:42,698 INFO L93 Difference]: Finished difference Result 2307 states and 4660 transitions. [2021-07-09 18:17:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:17:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:42,701 INFO L225 Difference]: With dead ends: 2307 [2021-07-09 18:17:42,701 INFO L226 Difference]: Without dead ends: 2223 [2021-07-09 18:17:42,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 2259.6ms TimeCoverageRelationStatistics Valid=550, Invalid=6590, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:17:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-07-09 18:17:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1959. [2021-07-09 18:17:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 2.0444330949948926) internal successors, (4003), 1958 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 4003 transitions. [2021-07-09 18:17:42,718 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 4003 transitions. Word has length 40 [2021-07-09 18:17:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:42,718 INFO L482 AbstractCegarLoop]: Abstraction has 1959 states and 4003 transitions. [2021-07-09 18:17:42,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 4003 transitions. [2021-07-09 18:17:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:42,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:42,720 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:42,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-07-09 18:17:42,920 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1841346823, now seen corresponding path program 272 times [2021-07-09 18:17:42,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:42,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653116974] [2021-07-09 18:17:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653116974] [2021-07-09 18:17:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653116974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76011787] [2021-07-09 18:17:43,287 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:43,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:43,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:43,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:43,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:43,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:43,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76011787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:43,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781904157] [2021-07-09 18:17:43,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:43,906 INFO L87 Difference]: Start difference. First operand 1959 states and 4003 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:45,737 INFO L93 Difference]: Finished difference Result 2185 states and 4410 transitions. [2021-07-09 18:17:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:17:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:45,739 INFO L225 Difference]: With dead ends: 2185 [2021-07-09 18:17:45,739 INFO L226 Difference]: Without dead ends: 2057 [2021-07-09 18:17:45,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1723.2ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:17:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-07-09 18:17:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1970. [2021-07-09 18:17:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.0462163534789233) internal successors, (4029), 1969 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 4029 transitions. [2021-07-09 18:17:45,758 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 4029 transitions. Word has length 40 [2021-07-09 18:17:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:45,759 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 4029 transitions. [2021-07-09 18:17:45,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 4029 transitions. [2021-07-09 18:17:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:45,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:45,760 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:45,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-09 18:17:45,961 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2039785915, now seen corresponding path program 273 times [2021-07-09 18:17:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:45,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222707466] [2021-07-09 18:17:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222707466] [2021-07-09 18:17:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222707466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787442759] [2021-07-09 18:17:46,326 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:46,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:46,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:17:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:46,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:46,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:46,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:46,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:46,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787442759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:46,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-07-09 18:17:46,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356735111] [2021-07-09 18:17:46,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:17:46,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:17:46,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:17:46,968 INFO L87 Difference]: Start difference. First operand 1970 states and 4029 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:49,380 INFO L93 Difference]: Finished difference Result 2249 states and 4548 transitions. [2021-07-09 18:17:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:17:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:49,382 INFO L225 Difference]: With dead ends: 2249 [2021-07-09 18:17:49,382 INFO L226 Difference]: Without dead ends: 2125 [2021-07-09 18:17:49,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 2216.3ms TimeCoverageRelationStatistics Valid=417, Invalid=5589, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:17:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-07-09 18:17:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1986. [2021-07-09 18:17:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 2.045340050377834) internal successors, (4060), 1985 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 4060 transitions. [2021-07-09 18:17:49,406 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 4060 transitions. Word has length 40 [2021-07-09 18:17:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:49,406 INFO L482 AbstractCegarLoop]: Abstraction has 1986 states and 4060 transitions. [2021-07-09 18:17:49,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 4060 transitions. [2021-07-09 18:17:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:49,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:49,407 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:49,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-09 18:17:49,608 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1583616775, now seen corresponding path program 274 times [2021-07-09 18:17:49,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:49,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399089499] [2021-07-09 18:17:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:49,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:49,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399089499] [2021-07-09 18:17:49,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399089499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:49,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211127827] [2021-07-09 18:17:49,965 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:49,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:49,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:50,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:50,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:50,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:50,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:50,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:50,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:50,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:17:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:50,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211127827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:50,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:50,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391467305] [2021-07-09 18:17:50,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:50,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:50,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:50,574 INFO L87 Difference]: Start difference. First operand 1986 states and 4060 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:53,998 INFO L93 Difference]: Finished difference Result 2338 states and 4730 transitions. [2021-07-09 18:17:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:17:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:54,000 INFO L225 Difference]: With dead ends: 2338 [2021-07-09 18:17:54,000 INFO L226 Difference]: Without dead ends: 2225 [2021-07-09 18:17:54,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 2686.1ms TimeCoverageRelationStatistics Valid=629, Invalid=7561, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:17:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-07-09 18:17:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2006. [2021-07-09 18:17:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 2.0458852867830424) internal successors, (4102), 2005 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 4102 transitions. [2021-07-09 18:17:54,017 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 4102 transitions. Word has length 40 [2021-07-09 18:17:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:54,018 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 4102 transitions. [2021-07-09 18:17:54,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 4102 transitions. [2021-07-09 18:17:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:54,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:54,019 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:54,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:54,220 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1325727931, now seen corresponding path program 275 times [2021-07-09 18:17:54,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:54,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921642622] [2021-07-09 18:17:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:54,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921642622] [2021-07-09 18:17:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921642622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005093556] [2021-07-09 18:17:54,577 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:54,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:54,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:17:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:55,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:55,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:55,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:55,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:55,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:17:55,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:55,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:55,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:55,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-09 18:17:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:55,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005093556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:55,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:55,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:17:55,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261639250] [2021-07-09 18:17:55,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:17:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:17:55,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:17:55,187 INFO L87 Difference]: Start difference. First operand 2006 states and 4102 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:58,837 INFO L93 Difference]: Finished difference Result 2420 states and 4895 transitions. [2021-07-09 18:17:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:17:58,837 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:17:58,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:58,840 INFO L225 Difference]: With dead ends: 2420 [2021-07-09 18:17:58,840 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:17:58,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2807.4ms TimeCoverageRelationStatistics Valid=632, Invalid=7740, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:17:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:17:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2014. [2021-07-09 18:17:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 2.046199701937407) internal successors, (4119), 2013 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 4119 transitions. [2021-07-09 18:17:58,859 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 4119 transitions. Word has length 40 [2021-07-09 18:17:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:58,859 INFO L482 AbstractCegarLoop]: Abstraction has 2014 states and 4119 transitions. [2021-07-09 18:17:58,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 4119 transitions. [2021-07-09 18:17:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:17:58,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:58,861 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:59,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,062 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:59,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:59,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1966838521, now seen corresponding path program 276 times [2021-07-09 18:17:59,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:59,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620654499] [2021-07-09 18:17:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:59,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620654499] [2021-07-09 18:17:59,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620654499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439249466] [2021-07-09 18:17:59,425 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:59,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:59,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:59,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:59,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:17:59,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:59,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:59,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:59,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:18:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439249466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:00,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:00,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:18:00,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874111771] [2021-07-09 18:18:00,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:18:00,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:18:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:00,008 INFO L87 Difference]: Start difference. First operand 2014 states and 4119 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:03,369 INFO L93 Difference]: Finished difference Result 2443 states and 4944 transitions. [2021-07-09 18:18:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:18:03,369 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:18:03,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:03,372 INFO L225 Difference]: With dead ends: 2443 [2021-07-09 18:18:03,372 INFO L226 Difference]: Without dead ends: 2379 [2021-07-09 18:18:03,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2703.4ms TimeCoverageRelationStatistics Valid=649, Invalid=7541, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 18:18:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-07-09 18:18:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2018. [2021-07-09 18:18:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.0461080813088746) internal successors, (4127), 2017 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 4127 transitions. [2021-07-09 18:18:03,390 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 4127 transitions. Word has length 40 [2021-07-09 18:18:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:03,391 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 4127 transitions. [2021-07-09 18:18:03,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 4127 transitions. [2021-07-09 18:18:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:18:03,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:03,392 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:03,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 18:18:03,593 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash -540596155, now seen corresponding path program 277 times [2021-07-09 18:18:03,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:03,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419117450] [2021-07-09 18:18:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:03,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:03,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419117450] [2021-07-09 18:18:03,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419117450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328064084] [2021-07-09 18:18:03,958 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:03,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:18:03,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:04,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:04,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:04,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:04,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:18:04,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:04,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:04,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:04,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:18:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:04,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328064084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:04,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:04,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:18:04,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607593242] [2021-07-09 18:18:04,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:18:04,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:18:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:04,547 INFO L87 Difference]: Start difference. First operand 2018 states and 4127 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:08,380 INFO L93 Difference]: Finished difference Result 2547 states and 5153 transitions. [2021-07-09 18:18:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:18:08,380 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:18:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:08,383 INFO L225 Difference]: With dead ends: 2547 [2021-07-09 18:18:08,383 INFO L226 Difference]: Without dead ends: 2475 [2021-07-09 18:18:08,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 3057.3ms TimeCoverageRelationStatistics Valid=765, Invalid=9537, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:18:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-07-09 18:18:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2009. [2021-07-09 18:18:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.0453187250996017) internal successors, (4107), 2008 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) [2021-07-09 18:18:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 4107 transitions. [2021-07-09 18:18:08,402 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 4107 transitions. Word has length 40 [2021-07-09 18:18:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:08,402 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 4107 transitions. [2021-07-09 18:18:08,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 4107 transitions. [2021-07-09 18:18:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:18:08,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:08,404 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:08,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-09 18:18:08,604 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -565491711, now seen corresponding path program 278 times [2021-07-09 18:18:08,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:08,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477239592] [2021-07-09 18:18:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:08,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477239592] [2021-07-09 18:18:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477239592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:08,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215482890] [2021-07-09 18:18:08,968 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:08,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:08,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:08,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:18:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:09,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:09,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:09,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:18:09,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:09,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:09,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:09,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-09 18:18:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215482890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:09,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:09,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-09 18:18:09,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080111456] [2021-07-09 18:18:09,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:18:09,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:18:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:18:09,555 INFO L87 Difference]: Start difference. First operand 2009 states and 4107 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:11,450 INFO L93 Difference]: Finished difference Result 2200 states and 4458 transitions. [2021-07-09 18:18:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:18:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 18:18:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:11,452 INFO L225 Difference]: With dead ends: 2200 [2021-07-09 18:18:11,453 INFO L226 Difference]: Without dead ends: 2144 [2021-07-09 18:18:11,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1768.8ms TimeCoverageRelationStatistics Valid=339, Invalid=4631, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:18:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-07-09 18:18:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2004. [2021-07-09 18:18:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 2.0454318522216677) internal successors, (4097), 2003 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 4097 transitions. [2021-07-09 18:18:11,470 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 4097 transitions. Word has length 40 [2021-07-09 18:18:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:11,470 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 4097 transitions. [2021-07-09 18:18:11,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 4097 transitions. [2021-07-09 18:18:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 18:18:11,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:11,472 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:11,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-07-09 18:18:11,672 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1723756681, now seen corresponding path program 279 times [2021-07-09 18:18:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:11,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245293324] [2021-07-09 18:18:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:12,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245293324] [2021-07-09 18:18:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245293324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:12,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955972470] [2021-07-09 18:18:12,037 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:12,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:18:12,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:12,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:18:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:18:12,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:12,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:12,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:12,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-09 18:18:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:12,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955972470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:12,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:12,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-07-09 18:18:12,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406266568] [2021-07-09 18:18:12,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:18:12,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:12,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:18:12,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:18:12,682 INFO L87 Difference]: Start difference. First operand 2004 states and 4097 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:18:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:18:13,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:13,663 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:18:13,665 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:18:13,666 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:18:13,666 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:18:13 BasicIcfg [2021-07-09 18:18:13,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:18:13,667 INFO L168 Benchmark]: Toolchain (without parser) took 786013.47 ms. Allocated memory was 203.4 MB in the beginning and 358.6 MB in the end (delta: 155.2 MB). Free memory was 184.0 MB in the beginning and 213.1 MB in the end (delta: -29.1 MB). Peak memory consumption was 127.4 MB. Max. memory is 8.0 GB. [2021-07-09 18:18:13,667 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 203.4 MB. Free memory is still 185.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:18:13,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 203.4 MB. Free memory was 183.9 MB in the beginning and 182.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:18:13,667 INFO L168 Benchmark]: Boogie Preprocessor took 12.04 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 181.5 MB in the end (delta: 973.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:18:13,667 INFO L168 Benchmark]: RCFGBuilder took 310.23 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 168.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:18:13,667 INFO L168 Benchmark]: TraceAbstraction took 785658.01 ms. Allocated memory was 203.4 MB in the beginning and 358.6 MB in the end (delta: 155.2 MB). Free memory was 168.3 MB in the beginning and 213.1 MB in the end (delta: -44.8 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:18:13,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 203.4 MB. Free memory is still 185.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.06 ms. Allocated memory is still 203.4 MB. Free memory was 183.9 MB in the beginning and 182.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.04 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 181.5 MB in the end (delta: 973.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 310.23 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 168.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 785658.01 ms. Allocated memory was 203.4 MB in the beginning and 358.6 MB in the end (delta: 155.2 MB). Free memory was 168.3 MB in the beginning and 213.1 MB in the end (delta: -44.8 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2004states) and FLOYD_HOARE automaton (currently 21 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (379 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 785567.6ms, OverallIterations: 285, TraceHistogramMax: 4, EmptinessCheckTime: 368.6ms, AutomataDifference: 508658.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15079 SDtfs, 47312 SDslu, 218162 SDs, 0 SdLazy, 523852 SolverSat, 23658 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 187406.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24765 GetRequests, 5976 SyntacticMatches, 912 SemanticMatches, 17877 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332675 ImplicationChecksByTransitivity, 442573.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2018occurred in iteration=282, InterpolantAutomatonStates: 13015, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3474.4ms AutomataMinimizationTime, 284 MinimizatonAttempts, 50096 StatesRemovedByMinimization, 282 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 893.1ms SsaConstructionTime, 2874.4ms SatisfiabilityAnalysisTime, 206654.5ms InterpolantComputationTime, 20238 NumberOfCodeBlocks, 20238 NumberOfCodeBlocksAsserted, 965 NumberOfCheckSat, 19670 ConstructedInterpolants, 1664 QuantifiedInterpolants, 368986 SizeOfPredicates, 2557 NumberOfNonLiveVariables, 22403 ConjunctsInSsa, 10797 ConjunctsInUnsatCore, 568 InterpolantComputations, 3 PerfectInterpolantSequences, 105/16115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown