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/eca-rers2012/Problem14_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:12,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:12,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:12,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:12,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:12,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:12,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:12,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:12,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:12,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:12,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:12,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:12,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:12,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:12,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:12,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:12,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:12,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:12,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:12,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:12,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:12,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:12,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:12,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:12,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:12,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:02:12,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:02:12,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:02:12,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:02:12,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:02:12,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:02:12,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:02:12,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:02:12,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:12,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:12,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:12,300 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 22:02:12,324 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:12,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:12,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:12,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:12,329 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:12,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:12,330 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:12,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:12,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:12,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:12,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:12,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:12,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:12,332 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:12,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:12,333 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:12,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:12,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:12,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:12,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:12,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:12,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:12,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:12,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:12,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:12,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:12,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:12,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:12,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:12,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:12,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:12,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:12,656 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:12,657 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:12,658 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-14 22:02:12,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf675f511/fd28753ee43b46d88ef1197ac4dad436/FLAGa9cdea21f [2019-10-14 22:02:13,300 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:13,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-14 22:02:13,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf675f511/fd28753ee43b46d88ef1197ac4dad436/FLAGa9cdea21f [2019-10-14 22:02:13,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf675f511/fd28753ee43b46d88ef1197ac4dad436 [2019-10-14 22:02:13,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:13,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:13,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:13,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:13,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:13,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65342265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:13, skipping insertion in model container [2019-10-14 22:02:13,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:13" (1/1) ... [2019-10-14 22:02:13,608 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:13,681 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:14,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:14,270 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:14,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:14,484 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:14,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14 WrapperNode [2019-10-14 22:02:14,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:14,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:14,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:14,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:14,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (1/1) ... [2019-10-14 22:02:14,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:14,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:14,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:14,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:14,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (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 22:02:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:14,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:16,455 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:16,457 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:16,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:16 BoogieIcfgContainer [2019-10-14 22:02:16,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:16,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:16,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:16,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:16,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:13" (1/3) ... [2019-10-14 22:02:16,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2bfe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:16, skipping insertion in model container [2019-10-14 22:02:16,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:14" (2/3) ... [2019-10-14 22:02:16,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2bfe77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:16, skipping insertion in model container [2019-10-14 22:02:16,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:16" (3/3) ... [2019-10-14 22:02:16,468 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-10-14 22:02:16,478 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:16,487 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:16,500 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:16,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:16,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:16,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:16,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:16,529 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:16,530 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:16,530 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:16,530 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 22:02:16,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:16,579 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:16,582 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-10-14 22:02:16,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:16,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801232780] [2019-10-14 22:02:16,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,001 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 22:02:17,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801232780] [2019-10-14 22:02:17,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:17,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:17,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099421438] [2019-10-14 22:02:17,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:17,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:17,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:17,028 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:19,817 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-14 22:02:19,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:19,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-14 22:02:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:19,844 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:02:19,844 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:19,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-14 22:02:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-14 22:02:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-14 22:02:20,001 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 42 [2019-10-14 22:02:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,002 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-14 22:02:20,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-14 22:02:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:02:20,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,015 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:20,016 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-10-14 22:02:20,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:20,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711902995] [2019-10-14 22:02:20,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:20,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711902995] [2019-10-14 22:02:20,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270793827] [2019-10-14 22:02:20,338 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 22:02:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:20,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:20,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:20,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:20,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536406985] [2019-10-14 22:02:20,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:20,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:20,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:20,512 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-14 22:02:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:21,581 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-10-14 22:02:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:21,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-14 22:02:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:21,587 INFO L225 Difference]: With dead ends: 1114 [2019-10-14 22:02:21,588 INFO L226 Difference]: Without dead ends: 744 [2019-10-14 22:02:21,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-14 22:02:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-14 22:02:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-14 22:02:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-10-14 22:02:21,623 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 125 [2019-10-14 22:02:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:21,624 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-10-14 22:02:21,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-10-14 22:02:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 22:02:21,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:21,628 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:21,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:21,833 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-10-14 22:02:21,835 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:21,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278574001] [2019-10-14 22:02:21,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:22,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278574001] [2019-10-14 22:02:22,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057302579] [2019-10-14 22:02:22,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:22,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:22,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:22,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:22,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342506669] [2019-10-14 22:02:22,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:22,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:22,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:22,246 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 3 states. [2019-10-14 22:02:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:23,078 INFO L93 Difference]: Finished difference Result 1850 states and 2489 transitions. [2019-10-14 22:02:23,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:23,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-10-14 22:02:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:23,084 INFO L225 Difference]: With dead ends: 1850 [2019-10-14 22:02:23,084 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:02:23,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:02:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-14 22:02:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 22:02:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1426 transitions. [2019-10-14 22:02:23,120 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1426 transitions. Word has length 137 [2019-10-14 22:02:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:23,121 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1426 transitions. [2019-10-14 22:02:23,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1426 transitions. [2019-10-14 22:02:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-14 22:02:23,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:23,125 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:23,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:23,330 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash 514032181, now seen corresponding path program 1 times [2019-10-14 22:02:23,331 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:23,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350944598] [2019-10-14 22:02:23,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:02:23,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350944598] [2019-10-14 22:02:23,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120725674] [2019-10-14 22:02:23,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:23,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:23,701 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:23,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 22:02:23,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978262153] [2019-10-14 22:02:23,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:23,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:23,703 INFO L87 Difference]: Start difference. First operand 1112 states and 1426 transitions. Second operand 3 states. [2019-10-14 22:02:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:24,506 INFO L93 Difference]: Finished difference Result 1848 states and 2448 transitions. [2019-10-14 22:02:24,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:24,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-10-14 22:02:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:24,518 INFO L225 Difference]: With dead ends: 1848 [2019-10-14 22:02:24,518 INFO L226 Difference]: Without dead ends: 1846 [2019-10-14 22:02:24,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2019-10-14 22:02:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1298. [2019-10-14 22:02:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-10-14 22:02:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1738 transitions. [2019-10-14 22:02:24,610 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1738 transitions. Word has length 151 [2019-10-14 22:02:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:24,611 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1738 transitions. [2019-10-14 22:02:24,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1738 transitions. [2019-10-14 22:02:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-14 22:02:24,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:24,615 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:24,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:24,820 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:24,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash -16458088, now seen corresponding path program 1 times [2019-10-14 22:02:24,821 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:24,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794477600] [2019-10-14 22:02:24,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:24,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:24,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:25,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794477600] [2019-10-14 22:02:25,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983610291] [2019-10-14 22:02:25,094 INFO L94 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 [2019-10-14 22:02:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:25,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:25,246 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:25,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:02:25,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249526666] [2019-10-14 22:02:25,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:25,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:25,249 INFO L87 Difference]: Start difference. First operand 1298 states and 1738 transitions. Second operand 11 states. [2019-10-14 22:02:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:29,966 INFO L93 Difference]: Finished difference Result 5136 states and 7486 transitions. [2019-10-14 22:02:29,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:02:29,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 205 [2019-10-14 22:02:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:29,995 INFO L225 Difference]: With dead ends: 5136 [2019-10-14 22:02:29,996 INFO L226 Difference]: Without dead ends: 3090 [2019-10-14 22:02:30,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2019-10-14 22:02:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2278. [2019-10-14 22:02:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-14 22:02:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3031 transitions. [2019-10-14 22:02:30,116 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3031 transitions. Word has length 205 [2019-10-14 22:02:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:30,117 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3031 transitions. [2019-10-14 22:02:30,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3031 transitions. [2019-10-14 22:02:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 22:02:30,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:30,125 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:30,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:30,331 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-10-14 22:02:30,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:30,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080756298] [2019-10-14 22:02:30,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:30,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:30,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:30,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080756298] [2019-10-14 22:02:30,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102734890] [2019-10-14 22:02:30,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:02:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:30,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:30,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:30,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:02:30,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583701233] [2019-10-14 22:02:30,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:30,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:30,952 INFO L87 Difference]: Start difference. First operand 2278 states and 3031 transitions. Second operand 11 states. [2019-10-14 22:02:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:34,552 INFO L93 Difference]: Finished difference Result 4784 states and 6518 transitions. [2019-10-14 22:02:34,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:02:34,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-10-14 22:02:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:34,565 INFO L225 Difference]: With dead ends: 4784 [2019-10-14 22:02:34,565 INFO L226 Difference]: Without dead ends: 2124 [2019-10-14 22:02:34,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2019-10-14 22:02:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2082. [2019-10-14 22:02:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2082 states. [2019-10-14 22:02:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2605 transitions. [2019-10-14 22:02:34,639 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2605 transitions. Word has length 256 [2019-10-14 22:02:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:34,639 INFO L462 AbstractCegarLoop]: Abstraction has 2082 states and 2605 transitions. [2019-10-14 22:02:34,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2605 transitions. [2019-10-14 22:02:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 22:02:34,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:34,645 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:34,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:34,850 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:34,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1463904413, now seen corresponding path program 1 times [2019-10-14 22:02:34,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:34,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264437835] [2019-10-14 22:02:34,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:34,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:34,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:35,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264437835] [2019-10-14 22:02:35,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931976032] [2019-10-14 22:02:35,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:02:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:35,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:35,592 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:35,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:02:35,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920653948] [2019-10-14 22:02:35,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:35,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:35,595 INFO L87 Difference]: Start difference. First operand 2082 states and 2605 transitions. Second operand 11 states. [2019-10-14 22:02:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:39,181 INFO L93 Difference]: Finished difference Result 5874 states and 8061 transitions. [2019-10-14 22:02:39,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 22:02:39,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-10-14 22:02:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:39,205 INFO L225 Difference]: With dead ends: 5874 [2019-10-14 22:02:39,205 INFO L226 Difference]: Without dead ends: 3412 [2019-10-14 22:02:39,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-14 22:02:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2019-10-14 22:02:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2976. [2019-10-14 22:02:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2019-10-14 22:02:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4140 transitions. [2019-10-14 22:02:39,363 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4140 transitions. Word has length 256 [2019-10-14 22:02:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:39,364 INFO L462 AbstractCegarLoop]: Abstraction has 2976 states and 4140 transitions. [2019-10-14 22:02:39,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4140 transitions. [2019-10-14 22:02:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-14 22:02:39,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:39,371 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:39,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:39,575 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash 943526086, now seen corresponding path program 1 times [2019-10-14 22:02:39,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:39,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464569711] [2019-10-14 22:02:39,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:02:40,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464569711] [2019-10-14 22:02:40,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831151687] [2019-10-14 22:02:40,011 INFO L94 rtionOrderModulation]: Keeping assertion order 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 22:02:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:40,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 22:02:40,242 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:40,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:02:40,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38297523] [2019-10-14 22:02:40,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:40,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:40,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:40,245 INFO L87 Difference]: Start difference. First operand 2976 states and 4140 transitions. Second operand 5 states. [2019-10-14 22:02:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:41,499 INFO L93 Difference]: Finished difference Result 5492 states and 7614 transitions. [2019-10-14 22:02:41,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:02:41,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-10-14 22:02:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:41,527 INFO L225 Difference]: With dead ends: 5492 [2019-10-14 22:02:41,527 INFO L226 Difference]: Without dead ends: 2732 [2019-10-14 22:02:41,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:41,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2019-10-14 22:02:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2690. [2019-10-14 22:02:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-10-14 22:02:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3454 transitions. [2019-10-14 22:02:41,624 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3454 transitions. Word has length 287 [2019-10-14 22:02:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:41,625 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 3454 transitions. [2019-10-14 22:02:41,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3454 transitions. [2019-10-14 22:02:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-14 22:02:41,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:41,635 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:41,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:41,839 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2088265127, now seen corresponding path program 1 times [2019-10-14 22:02:41,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:41,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656529428] [2019-10-14 22:02:41,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 115 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:43,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656529428] [2019-10-14 22:02:43,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038648548] [2019-10-14 22:02:43,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:02:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:43,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-10-14 22:02:43,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:43,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-10-14 22:02:43,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138404800] [2019-10-14 22:02:43,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:43,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:43,643 INFO L87 Difference]: Start difference. First operand 2690 states and 3454 transitions. Second operand 3 states. [2019-10-14 22:02:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:44,437 INFO L93 Difference]: Finished difference Result 5564 states and 7110 transitions. [2019-10-14 22:02:44,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:44,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2019-10-14 22:02:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:44,452 INFO L225 Difference]: With dead ends: 5564 [2019-10-14 22:02:44,452 INFO L226 Difference]: Without dead ends: 2872 [2019-10-14 22:02:44,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2019-10-14 22:02:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2684. [2019-10-14 22:02:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2019-10-14 22:02:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3406 transitions. [2019-10-14 22:02:44,533 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3406 transitions. Word has length 343 [2019-10-14 22:02:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:44,534 INFO L462 AbstractCegarLoop]: Abstraction has 2684 states and 3406 transitions. [2019-10-14 22:02:44,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3406 transitions. [2019-10-14 22:02:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-10-14 22:02:44,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:44,542 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:44,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:44,748 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 366121579, now seen corresponding path program 1 times [2019-10-14 22:02:44,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:44,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458546751] [2019-10-14 22:02:44,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:44,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 115 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:46,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458546751] [2019-10-14 22:02:46,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958724218] [2019-10-14 22:02:46,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:46,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:46,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 296 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 22:02:46,589 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:46,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:46,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152080229] [2019-10-14 22:02:46,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:46,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:46,592 INFO L87 Difference]: Start difference. First operand 2684 states and 3406 transitions. Second operand 16 states.