java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:52,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:52,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:52,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:52,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:52,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:52,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:52,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:52,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:52,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:52,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:52,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:52,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:52,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:52,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:52,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:52,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:52,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:52,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:52,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:52,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:52,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:52,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:52,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:52,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:52,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:52,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:52,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:52,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:52,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:52,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:52,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:52,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:52,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:52,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:52,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:52,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:16:52,179 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:52,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:52,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:52,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:52,181 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:52,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:52,181 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:52,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:52,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:52,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:52,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:52,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:52,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:52,183 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:52,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:52,183 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:52,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:52,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:52,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:52,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:52,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:52,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:52,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:52,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:52,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:52,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:52,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:52,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:52,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:52,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:52,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:52,472 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:52,473 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:52,474 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:52,474 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2019-10-14 23:16:52,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434791c99/d83da82988f8457fb1bc3e387e090dbc/FLAG2bf68967c [2019-10-14 23:16:52,946 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:52,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2019-10-14 23:16:52,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434791c99/d83da82988f8457fb1bc3e387e090dbc/FLAG2bf68967c [2019-10-14 23:16:53,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/434791c99/d83da82988f8457fb1bc3e387e090dbc [2019-10-14 23:16:53,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:53,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:53,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:53,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:53,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:53,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443b39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53, skipping insertion in model container [2019-10-14 23:16:53,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,348 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:53,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:53,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:53,550 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:53,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:53,584 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:53,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53 WrapperNode [2019-10-14 23:16:53,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:53,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:53,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:53,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:53,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (1/1) ... [2019-10-14 23:16:53,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:53,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:53,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:53,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:53,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (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 [2019-10-14 23:16:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:53,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:53,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:53,984 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:53,985 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:53,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:53 BoogieIcfgContainer [2019-10-14 23:16:53,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:53,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:53,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:53,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:53,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:53" (1/3) ... [2019-10-14 23:16:53,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b24cc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:53, skipping insertion in model container [2019-10-14 23:16:53,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:53" (2/3) ... [2019-10-14 23:16:53,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b24cc48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:53, skipping insertion in model container [2019-10-14 23:16:53,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:53" (3/3) ... [2019-10-14 23:16:54,007 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2019-10-14 23:16:54,028 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:54,037 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:54,046 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:54,073 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:54,073 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:54,073 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:54,073 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:54,074 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:54,074 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:54,074 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:54,075 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-14 23:16:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:54,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:54,103 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:54,104 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:54,110 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2019-10-14 23:16:54,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:54,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638854738] [2019-10-14 23:16:54,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:54,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638854738] [2019-10-14 23:16:54,213 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:54,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:16:54,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870946672] [2019-10-14 23:16:54,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:16:54,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:16:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:16:54,236 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-14 23:16:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:54,258 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-14 23:16:54,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:16:54,259 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:16:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:54,267 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:54,267 INFO L226 Difference]: Without dead ends: 12 [2019-10-14 23:16:54,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:16:54,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-14 23:16:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-14 23:16:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-14 23:16:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-14 23:16:54,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-14 23:16:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:54,314 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-14 23:16:54,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:16:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-14 23:16:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:16:54,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:54,317 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:54,317 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash -15914692, now seen corresponding path program 1 times [2019-10-14 23:16:54,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:54,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228287152] [2019-10-14 23:16:54,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:54,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228287152] [2019-10-14 23:16:54,401 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:54,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:54,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313475131] [2019-10-14 23:16:54,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:54,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:54,404 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2019-10-14 23:16:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:54,450 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-14 23:16:54,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:54,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-14 23:16:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:54,452 INFO L225 Difference]: With dead ends: 19 [2019-10-14 23:16:54,453 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:16:54,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:16:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-10-14 23:16:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:16:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-14 23:16:54,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-10-14 23:16:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:54,460 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-14 23:16:54,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-14 23:16:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:54,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:54,462 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:54,463 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:54,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2019-10-14 23:16:54,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:54,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307583483] [2019-10-14 23:16:54,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:54,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307583483] [2019-10-14 23:16:54,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743843432] [2019-10-14 23:16:54,607 INFO L94 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 [2019-10-14 23:16:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:54,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:54,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:54,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:54,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-10-14 23:16:54,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140295500] [2019-10-14 23:16:54,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:54,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:54,707 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2019-10-14 23:16:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:54,740 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-14 23:16:54,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:54,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-14 23:16:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:54,742 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:16:54,743 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:16:54,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:16:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-14 23:16:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:16:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-14 23:16:54,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-10-14 23:16:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:54,749 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-14 23:16:54,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-14 23:16:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:16:54,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:54,751 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:54,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:54,956 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2019-10-14 23:16:54,958 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:54,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043723545] [2019-10-14 23:16:54,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:54,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043723545] [2019-10-14 23:16:55,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102855932] [2019-10-14 23:16:55,045 INFO L92 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 [2019-10-14 23:16:55,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:55,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:55,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:55,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,105 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:55,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-10-14 23:16:55,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143815425] [2019-10-14 23:16:55,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:55,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:55,109 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2019-10-14 23:16:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:55,138 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-14 23:16:55,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:55,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-10-14 23:16:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:55,139 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:16:55,140 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:16:55,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:16:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-10-14 23:16:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:16:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-14 23:16:55,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-10-14 23:16:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:55,146 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-14 23:16:55,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-14 23:16:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:16:55,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:55,147 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:55,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:55,356 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:55,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2019-10-14 23:16:55,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:55,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366711546] [2019-10-14 23:16:55,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366711546] [2019-10-14 23:16:55,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529270251] [2019-10-14 23:16:55,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:55,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:16:55,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:55,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:55,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:55,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-10-14 23:16:55,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512006835] [2019-10-14 23:16:55,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:55,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:55,459 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2019-10-14 23:16:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:55,504 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-14 23:16:55,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:55,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-14 23:16:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:55,506 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:16:55,507 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:16:55,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:16:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-14 23:16:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:16:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-14 23:16:55,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-10-14 23:16:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:55,517 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-14 23:16:55,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-14 23:16:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:55,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:55,520 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:55,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:55,732 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2019-10-14 23:16:55,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:55,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576229596] [2019-10-14 23:16:55,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:55,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576229596] [2019-10-14 23:16:55,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130028412] [2019-10-14 23:16:55,814 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:55,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:55,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:55,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:55,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:55,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:55,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-10-14 23:16:55,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389486239] [2019-10-14 23:16:55,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:55,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:55,861 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2019-10-14 23:16:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:55,890 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-14 23:16:55,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:55,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-10-14 23:16:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:55,892 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:16:55,892 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:16:55,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:16:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-14 23:16:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:16:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-14 23:16:55,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-10-14 23:16:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:55,900 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-14 23:16:55,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-14 23:16:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:55,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:55,901 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:56,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:56,103 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2019-10-14 23:16:56,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:56,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399721444] [2019-10-14 23:16:56,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:56,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399721444] [2019-10-14 23:16:56,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744712779] [2019-10-14 23:16:56,224 INFO L92 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 [2019-10-14 23:16:56,250 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:16:56,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:56,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:56,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:56,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:56,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-14 23:16:56,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770655713] [2019-10-14 23:16:56,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:56,261 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:56,262 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2019-10-14 23:16:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:56,295 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:16:56,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:56,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-14 23:16:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:56,296 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:56,296 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:16:56,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:16:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 23:16:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:16:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-14 23:16:56,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-10-14 23:16:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:56,301 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-14 23:16:56,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-14 23:16:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:56,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:56,303 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:56,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:56,505 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2019-10-14 23:16:56,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:56,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125764322] [2019-10-14 23:16:56,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:56,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125764322] [2019-10-14 23:16:56,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915685297] [2019-10-14 23:16:56,595 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:56,637 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:16:56,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:56,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:56,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:56,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:56,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-10-14 23:16:56,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998525613] [2019-10-14 23:16:56,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:16:56,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:16:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:56,668 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2019-10-14 23:16:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:56,703 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-14 23:16:56,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:56,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-14 23:16:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:56,704 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:16:56,704 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:16:56,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:16:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-14 23:16:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:16:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-14 23:16:56,709 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-10-14 23:16:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:56,710 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-14 23:16:56,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:16:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-14 23:16:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:56,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:56,711 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:56,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:56,915 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2019-10-14 23:16:56,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:56,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637148303] [2019-10-14 23:16:56,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:56,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:57,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637148303] [2019-10-14 23:16:57,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893114922] [2019-10-14 23:16:57,032 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:16:57,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:57,072 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:57,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-14 23:16:57,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810489892] [2019-10-14 23:16:57,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:16:57,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:16:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:57,074 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2019-10-14 23:16:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:57,120 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-14 23:16:57,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:16:57,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-10-14 23:16:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:57,122 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:57,122 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:57,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:16:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-14 23:16:57,131 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-10-14 23:16:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:57,133 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-14 23:16:57,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:16:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-14 23:16:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:57,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:57,135 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:57,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:57,338 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2019-10-14 23:16:57,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:57,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768825294] [2019-10-14 23:16:57,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:57,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:57,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:57,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768825294] [2019-10-14 23:16:57,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826274338] [2019-10-14 23:16:57,553 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:57,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:57,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:57,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:16:57,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:57,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:57,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:57,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-10-14 23:16:57,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328944948] [2019-10-14 23:16:57,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:16:57,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:16:57,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:16:57,675 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2019-10-14 23:16:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:57,786 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-14 23:16:57,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:16:57,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2019-10-14 23:16:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:57,788 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:57,788 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:57,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:16:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-14 23:16:57,802 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-10-14 23:16:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:57,802 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-14 23:16:57,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:16:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-14 23:16:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:57,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:57,804 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:58,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:58,017 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2019-10-14 23:16:58,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:58,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144596442] [2019-10-14 23:16:58,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:58,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:58,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:58,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144596442] [2019-10-14 23:16:58,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:58,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-14 23:16:58,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103261627] [2019-10-14 23:16:58,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:58,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:58,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:58,130 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2019-10-14 23:16:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:58,179 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:16:58,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:16:58,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-14 23:16:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:58,181 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:58,181 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:16:58,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:16:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:16:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:16:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:16:58,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-10-14 23:16:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:58,185 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:16:58,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:16:58,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:16:58,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:16:58,318 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:16:58,318 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:58,318 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:58,318 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:16:58,318 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:16:58,318 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:58,319 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2019-10-14 23:16:58,319 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2019-10-14 23:16:58,319 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2019-10-14 23:16:58,319 INFO L443 ceAbstractionStarter]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2019-10-14 23:16:58,320 INFO L439 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 10 main_~sn~0) (<= 6 main_~i~0) (<= main_~i~0 6) (<= main_~sn~0 10)) (and (<= 1 main_~i~0) (<= main_~i~0 1) (<= main_~sn~0 0) (<= 0 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~i~0 2) (<= main_~sn~0 2) (<= 2 main_~sn~0)) (and (<= 6 main_~sn~0) (<= main_~sn~0 6) (<= 4 main_~i~0) (<= main_~i~0 4)) (and (<= 7 main_~i~0) (<= 12 main_~sn~0) (<= main_~sn~0 12) (<= main_~i~0 7)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 3) (<= main_~sn~0 4) (<= 3 main_~i~0) (<= 4 main_~sn~0)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= 14 main_~sn~0) (<= 8 main_~i~0) (<= main_~i~0 8) (<= main_~sn~0 14))) [2019-10-14 23:16:58,320 INFO L439 ceAbstractionStarter]: At program point L13-4(lines 13 15) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2019-10-14 23:16:58,320 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:16:58,320 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:16:58,320 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:16:58,320 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:16:58,321 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:16:58,321 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:16:58,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:58 BoogieIcfgContainer [2019-10-14 23:16:58,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:58,341 INFO L168 Benchmark]: Toolchain (without parser) took 5008.47 ms. Allocated memory was 138.9 MB in the beginning and 243.8 MB in the end (delta: 104.9 MB). Free memory was 103.8 MB in the beginning and 181.8 MB in the end (delta: -78.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,342 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.22 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,344 INFO L168 Benchmark]: Boogie Preprocessor took 111.17 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 181.9 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,344 INFO L168 Benchmark]: RCFGBuilder took 290.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.9 MB in the beginning and 170.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,345 INFO L168 Benchmark]: TraceAbstraction took 4349.78 ms. Allocated memory was 202.4 MB in the beginning and 243.8 MB in the end (delta: 41.4 MB). Free memory was 170.1 MB in the beginning and 181.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:58,349 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.22 ms. Allocated memory is still 138.9 MB. Free memory was 103.5 MB in the beginning and 94.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.17 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 181.9 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.52 ms. Allocated memory is still 202.4 MB. Free memory was 181.9 MB in the beginning and 170.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4349.78 ms. Allocated memory was 202.4 MB in the beginning and 243.8 MB in the end (delta: 41.4 MB). Free memory was 170.1 MB in the beginning and 181.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((10 <= sn && 6 <= i) && i <= 6) && sn <= 10) || (((1 <= i && i <= 1) && sn <= 0) && 0 <= sn)) || (((2 <= i && i <= 2) && sn <= 2) && 2 <= sn)) || (((6 <= sn && sn <= 6) && 4 <= i) && i <= 4)) || (((7 <= i && 12 <= sn) && sn <= 12) && i <= 7)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 3 && sn <= 4) && 3 <= i) && 4 <= sn)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((14 <= sn && 8 <= i) && i <= 8) && sn <= 14) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 4.2s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 120 SDtfs, 37 SDslu, 380 SDs, 0 SdLazy, 276 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 127 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 352 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 17729 SizeOfPredicates, 8 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 81/489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...