/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:40:06,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:40:06,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:40:06,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:40:06,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:40:06,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:40:06,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:40:06,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:40:06,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:40:06,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:40:06,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:40:06,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:40:06,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:40:06,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:40:06,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:40:06,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:40:06,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:40:06,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:40:06,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:40:06,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:40:06,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:40:06,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:40:06,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:40:06,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:40:06,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:40:06,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:40:06,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:40:06,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:40:06,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:40:06,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:40:06,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:40:06,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:40:06,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:40:06,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:40:06,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:40:06,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:40:06,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:40:06,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:40:06,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:40:06,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:40:06,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:40:06,349 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 [2019-11-07 04:40:06,372 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:40:06,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:40:06,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:40:06,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:40:06,377 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:40:06,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:40:06,377 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:40:06,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:40:06,379 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:40:06,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:40:06,379 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:40:06,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:40:06,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:40:06,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:40:06,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:40:06,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:40:06,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:40:06,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:40:06,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:40:06,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:40:06,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:40:06,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:40:06,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:40:06,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:40:06,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:40:06,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:40:06,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:40:06,666 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:40:06,666 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:40:06,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-11-07 04:40:06,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53efea294/82e5a23ccf34402c87fe46af29239583/FLAG5e3f78559 [2019-11-07 04:40:07,214 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:40:07,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-11-07 04:40:07,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53efea294/82e5a23ccf34402c87fe46af29239583/FLAG5e3f78559 [2019-11-07 04:40:07,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53efea294/82e5a23ccf34402c87fe46af29239583 [2019-11-07 04:40:07,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:40:07,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:40:07,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:40:07,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:40:07,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:40:07,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:40:07" (1/1) ... [2019-11-07 04:40:07,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b25df0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:07, skipping insertion in model container [2019-11-07 04:40:07,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:40:07" (1/1) ... [2019-11-07 04:40:07,675 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:40:07,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:40:07,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:40:07,950 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:40:08,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:40:08,102 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:40:08,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08 WrapperNode [2019-11-07 04:40:08,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:40:08,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:40:08,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:40:08,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:40:08,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (1/1) ... [2019-11-07 04:40:08,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:40:08,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:40:08,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:40:08,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:40:08,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (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 [2019-11-07 04:40:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:40:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:40:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 04:40:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:40:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:40:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:40:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:40:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:40:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:40:08,707 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:40:08,707 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 04:40:08,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:40:08 BoogieIcfgContainer [2019-11-07 04:40:08,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:40:08,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:40:08,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:40:08,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:40:08,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:40:07" (1/3) ... [2019-11-07 04:40:08,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b769776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:40:08, skipping insertion in model container [2019-11-07 04:40:08,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:40:08" (2/3) ... [2019-11-07 04:40:08,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b769776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:40:08, skipping insertion in model container [2019-11-07 04:40:08,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:40:08" (3/3) ... [2019-11-07 04:40:08,719 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-11-07 04:40:08,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:40:08,738 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:40:08,750 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:40:08,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:40:08,790 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:40:08,790 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:40:08,790 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:40:08,791 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:40:08,791 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:40:08,791 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:40:08,791 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:40:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 04:40:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:40:08,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:08,814 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:08,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-11-07 04:40:08,829 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:08,829 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16354298] [2019-11-07 04:40:08,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 04:40:09,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16354298] [2019-11-07 04:40:09,034 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:40:09,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:40:09,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466842897] [2019-11-07 04:40:09,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:09,041 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:09,057 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 04:40:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:09,090 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 04:40:09,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:09,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 04:40:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:09,101 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:40:09,101 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:40:09,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:40:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:40:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:40:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 04:40:09,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 04:40:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:09,150 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 04:40:09,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:09,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 04:40:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:40:09,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:09,153 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:09,153 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-11-07 04:40:09,154 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:09,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491085564] [2019-11-07 04:40:09,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:09,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491085564] [2019-11-07 04:40:09,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336670467] [2019-11-07 04:40:09,224 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 [2019-11-07 04:40:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:09,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:40:09,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:09,371 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:40:09,461 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:40:09,461 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 04:40:09,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147361340] [2019-11-07 04:40:09,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:09,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:09,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:09,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:40:09,468 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 04:40:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:09,494 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 04:40:09,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:09,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:40:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:09,495 INFO L225 Difference]: With dead ends: 33 [2019-11-07 04:40:09,495 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 04:40:09,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:40:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 04:40:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 04:40:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:40:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:40:09,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 04:40:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:09,516 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:40:09,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:40:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 04:40:09,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:09,521 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:09,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:09,725 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-11-07 04:40:09,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:09,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819723921] [2019-11-07 04:40:09,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:09,828 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819723921] [2019-11-07 04:40:09,828 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:40:09,828 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:40:09,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38718175] [2019-11-07 04:40:09,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:40:09,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:40:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:09,830 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 04:40:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:09,841 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 04:40:09,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:40:09,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 04:40:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:09,843 INFO L225 Difference]: With dead ends: 31 [2019-11-07 04:40:09,843 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:40:09,844 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:40:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:40:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:40:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:40:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 04:40:09,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 04:40:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:09,852 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 04:40:09,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:40:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 04:40:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 04:40:09,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:09,853 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:09,854 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-11-07 04:40:09,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:09,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898518062] [2019-11-07 04:40:09,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:09,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898518062] [2019-11-07 04:40:09,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959353473] [2019-11-07 04:40:09,989 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 [2019-11-07 04:40:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:10,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:10,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:10,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:10,145 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154506679] [2019-11-07 04:40:10,177 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:10,177 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:10,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:10,198 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:10,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:10,373 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:10,920 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:10,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:10,960 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:11,622 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:11,622 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 04:40:11,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024789352] [2019-11-07 04:40:11,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 04:40:11,624 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:11,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 04:40:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:40:11,626 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 04:40:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:12,563 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 04:40:12,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 04:40:12,564 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 04:40:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:12,565 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:40:12,565 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 04:40:12,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 04:40:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 04:40:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 04:40:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 04:40:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 04:40:12,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 04:40:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:12,597 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 04:40:12,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 04:40:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 04:40:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 04:40:12,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:12,601 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:12,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:12,802 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-11-07 04:40:12,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:12,803 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512341777] [2019-11-07 04:40:12,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:40:12,905 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512341777] [2019-11-07 04:40:12,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078035443] [2019-11-07 04:40:12,906 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 [2019-11-07 04:40:12,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 04:40:12,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:12,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:12,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:40:13,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:40:13,052 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1944725109] [2019-11-07 04:40:13,054 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:13,054 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:13,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:13,059 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:13,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:13,089 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:13,464 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:13,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:13,486 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:14,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:14,131 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 04:40:14,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131241368] [2019-11-07 04:40:14,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 04:40:14,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:14,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 04:40:14,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2019-11-07 04:40:14,134 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 04:40:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:15,457 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 04:40:15,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 04:40:15,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 04:40:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:15,458 INFO L225 Difference]: With dead ends: 44 [2019-11-07 04:40:15,458 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 04:40:15,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2019-11-07 04:40:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 04:40:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 04:40:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 04:40:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 04:40:15,468 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 04:40:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:15,469 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 04:40:15,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 04:40:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 04:40:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 04:40:15,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:15,470 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:15,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:15,675 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:15,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1603069542, now seen corresponding path program 3 times [2019-11-07 04:40:15,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:15,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765056676] [2019-11-07 04:40:15,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:15,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765056676] [2019-11-07 04:40:15,902 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374601216] [2019-11-07 04:40:15,902 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 [2019-11-07 04:40:15,993 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:40:15,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:15,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 04:40:16,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:16,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:16,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840093970] [2019-11-07 04:40:16,103 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:16,104 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:16,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:16,105 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:16,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:16,129 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:16,402 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:16,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:16,433 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:17,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:17,261 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 04:40:17,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339057963] [2019-11-07 04:40:17,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 04:40:17,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 04:40:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-11-07 04:40:17,264 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 04:40:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:18,469 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 04:40:18,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 04:40:18,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 04:40:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:18,471 INFO L225 Difference]: With dead ends: 54 [2019-11-07 04:40:18,471 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 04:40:18,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 04:40:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 04:40:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 04:40:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 04:40:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 04:40:18,482 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 04:40:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:18,482 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 04:40:18,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 04:40:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 04:40:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 04:40:18,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:18,484 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:18,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:18,688 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:18,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1700782945, now seen corresponding path program 4 times [2019-11-07 04:40:18,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:18,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634077876] [2019-11-07 04:40:18,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:18,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634077876] [2019-11-07 04:40:18,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83639465] [2019-11-07 04:40:18,879 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 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 [2019-11-07 04:40:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:18,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 04:40:18,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:18,986 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:19,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [974223035] [2019-11-07 04:40:19,283 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:19,283 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:19,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:19,283 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:19,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:19,300 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:19,566 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:19,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:19,593 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:20,300 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:20,300 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 04:40:20,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024782353] [2019-11-07 04:40:20,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 04:40:20,302 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 04:40:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 04:40:20,304 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 04:40:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:22,661 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 04:40:22,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 04:40:22,662 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 04:40:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:22,664 INFO L225 Difference]: With dead ends: 68 [2019-11-07 04:40:22,664 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 04:40:22,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1281, Invalid=5039, Unknown=0, NotChecked=0, Total=6320 [2019-11-07 04:40:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 04:40:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 04:40:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 04:40:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 04:40:22,676 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 04:40:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:22,676 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 04:40:22,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 04:40:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 04:40:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 04:40:22,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:22,679 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:22,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:22,882 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1773432895, now seen corresponding path program 5 times [2019-11-07 04:40:22,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:22,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970278254] [2019-11-07 04:40:22,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 04:40:23,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970278254] [2019-11-07 04:40:23,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81962279] [2019-11-07 04:40:23,356 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 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 [2019-11-07 04:40:23,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 04:40:23,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:23,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:40:23,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 04:40:23,500 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 04:40:23,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580689186] [2019-11-07 04:40:23,540 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:23,540 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:23,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:23,541 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:23,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:23,564 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:23,805 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:23,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:23,822 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:24,751 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:24,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 04:40:24,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169411029] [2019-11-07 04:40:24,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 04:40:24,754 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 04:40:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1702, Unknown=0, NotChecked=0, Total=2162 [2019-11-07 04:40:24,756 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 04:40:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:27,605 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 04:40:27,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 04:40:27,606 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 04:40:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:27,607 INFO L225 Difference]: With dead ends: 72 [2019-11-07 04:40:27,607 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 04:40:27,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1386, Invalid=6446, Unknown=0, NotChecked=0, Total=7832 [2019-11-07 04:40:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 04:40:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 04:40:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 04:40:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 04:40:27,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 04:40:27,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:27,621 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 04:40:27,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 04:40:27,622 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 04:40:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 04:40:27,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:27,623 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:27,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:27,830 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash -806625269, now seen corresponding path program 6 times [2019-11-07 04:40:27,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:27,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118549899] [2019-11-07 04:40:27,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:40:28,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118549899] [2019-11-07 04:40:28,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681082483] [2019-11-07 04:40:28,491 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 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 [2019-11-07 04:40:28,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:40:28,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:28,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 04:40:28,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:40:28,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:40:29,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126183295] [2019-11-07 04:40:29,703 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:29,703 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:29,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:29,709 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:29,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:29,751 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:30,030 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:30,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:30,048 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:33,057 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:33,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 57 [2019-11-07 04:40:33,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748169385] [2019-11-07 04:40:33,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-07 04:40:33,059 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:33,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-07 04:40:33,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=2248, Unknown=1, NotChecked=0, Total=3192 [2019-11-07 04:40:33,061 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 57 states. [2019-11-07 04:40:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:37,869 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-11-07 04:40:37,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-07 04:40:37,870 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 67 [2019-11-07 04:40:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:37,871 INFO L225 Difference]: With dead ends: 88 [2019-11-07 04:40:37,871 INFO L226 Difference]: Without dead ends: 67 [2019-11-07 04:40:37,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2744, Invalid=8810, Unknown=2, NotChecked=0, Total=11556 [2019-11-07 04:40:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-07 04:40:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-07 04:40:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-07 04:40:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-11-07 04:40:37,886 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 67 [2019-11-07 04:40:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:37,886 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-11-07 04:40:37,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-07 04:40:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-11-07 04:40:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-07 04:40:37,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:37,888 INFO L410 BasicCegarLoop]: trace histogram [40, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:38,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:38,094 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2020178544, now seen corresponding path program 7 times [2019-11-07 04:40:38,095 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:38,095 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890401888] [2019-11-07 04:40:38,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-11-07 04:40:38,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890401888] [2019-11-07 04:40:38,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90126429] [2019-11-07 04:40:38,236 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 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 [2019-11-07 04:40:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:38,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:40:38,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-11-07 04:40:38,432 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-11-07 04:40:38,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258605994] [2019-11-07 04:40:38,507 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:38,507 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:38,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:38,508 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:38,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:38,521 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:38,761 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:38,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:38,779 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:39,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:39,288 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 15] total 27 [2019-11-07 04:40:39,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402319183] [2019-11-07 04:40:39,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-07 04:40:39,289 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-07 04:40:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2019-11-07 04:40:39,290 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 27 states. [2019-11-07 04:40:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:40,401 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2019-11-07 04:40:40,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-07 04:40:40,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 80 [2019-11-07 04:40:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:40,402 INFO L225 Difference]: With dead ends: 93 [2019-11-07 04:40:40,402 INFO L226 Difference]: Without dead ends: 73 [2019-11-07 04:40:40,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 04:40:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-07 04:40:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-07 04:40:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-07 04:40:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-07 04:40:40,415 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 80 [2019-11-07 04:40:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:40,415 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-07 04:40:40,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-07 04:40:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-07 04:40:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 04:40:40,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:40,417 INFO L410 BasicCegarLoop]: trace histogram [40, 30, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:40,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:40,622 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash 20741968, now seen corresponding path program 8 times [2019-11-07 04:40:40,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:40,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390479113] [2019-11-07 04:40:40,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 122 proven. 177 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2019-11-07 04:40:40,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390479113] [2019-11-07 04:40:40,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654072174] [2019-11-07 04:40:40,962 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 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 [2019-11-07 04:40:41,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 04:40:41,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:41,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:40:41,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2019-11-07 04:40:41,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2019-11-07 04:40:41,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372091235] [2019-11-07 04:40:41,281 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:41,281 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:41,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:41,282 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:41,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:41,300 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:41,497 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:41,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:41,510 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:42,330 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:42,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7, 15] total 37 [2019-11-07 04:40:42,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926559] [2019-11-07 04:40:42,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-07 04:40:42,332 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-07 04:40:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 04:40:42,333 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 37 states. [2019-11-07 04:40:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:40:44,833 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-11-07 04:40:44,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-07 04:40:44,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 98 [2019-11-07 04:40:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:40:44,835 INFO L225 Difference]: With dead ends: 106 [2019-11-07 04:40:44,835 INFO L226 Difference]: Without dead ends: 80 [2019-11-07 04:40:44,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=634, Invalid=4058, Unknown=0, NotChecked=0, Total=4692 [2019-11-07 04:40:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-07 04:40:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-07 04:40:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-07 04:40:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-07 04:40:44,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 98 [2019-11-07 04:40:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:40:44,852 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-07 04:40:44,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-07 04:40:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-07 04:40:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-07 04:40:44,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:40:44,864 INFO L410 BasicCegarLoop]: trace histogram [40, 33, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:40:45,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:45,070 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:40:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:40:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2015405694, now seen corresponding path program 9 times [2019-11-07 04:40:45,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:40:45,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786506182] [2019-11-07 04:40:45,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:40:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:40:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 145 proven. 211 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2019-11-07 04:40:45,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786506182] [2019-11-07 04:40:45,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308579729] [2019-11-07 04:40:45,393 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:40:45,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 04:40:45,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:40:45,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:40:45,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:40:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 290 proven. 66 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2019-11-07 04:40:45,621 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:40:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1511 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2019-11-07 04:40:45,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528557801] [2019-11-07 04:40:45,844 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 04:40:45,844 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:40:45,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:40:45,845 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:40:45,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:40:45,864 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:40:46,059 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-11-07 04:40:46,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:40:46,077 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:40:46,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:40:46,721 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 15] total 41 [2019-11-07 04:40:46,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425529286] [2019-11-07 04:40:46,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-07 04:40:46,722 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:40:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-07 04:40:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 04:40:46,724 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 41 states.