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/array-tiling/nr3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:38:06,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:38:06,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:38:06,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:38:06,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:38:06,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:38:06,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:38:06,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:38:06,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:38:06,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:38:06,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:38:06,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:38:06,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:38:06,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:38:06,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:38:06,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:38:06,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:38:06,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:38:06,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:38:06,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:38:06,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:38:06,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:38:06,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:38:06,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:38:06,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:38:06,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:38:06,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:38:06,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:38:06,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:38:06,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:38:06,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:38:06,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:38:06,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:38:06,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:38:06,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:38:06,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:38:06,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:38:06,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:38:06,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:38:06,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:38:06,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:38:06,360 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:38:06,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:38:06,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:38:06,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:38:06,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:38:06,398 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:38:06,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:38:06,398 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:38:06,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:38:06,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:38:06,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:38:06,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:38:06,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:38:06,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:38:06,400 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:38:06,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:38:06,400 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:38:06,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:38:06,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:38:06,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:38:06,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:38:06,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:38:06,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:06,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:38:06,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:38:06,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:38:06,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:38:06,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:38:06,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:38:06,404 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 [2019-10-15 01:38:06,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:38:06,685 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:38:06,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:38:06,690 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:38:06,690 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:38:06,691 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr3.c [2019-10-15 01:38:06,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7df1df/72b513c46dcd4587886471b1d9280a6e/FLAG5229b60b7 [2019-10-15 01:38:07,216 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:38:07,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr3.c [2019-10-15 01:38:07,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7df1df/72b513c46dcd4587886471b1d9280a6e/FLAG5229b60b7 [2019-10-15 01:38:07,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7df1df/72b513c46dcd4587886471b1d9280a6e [2019-10-15 01:38:07,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:38:07,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:38:07,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:07,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:38:07,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:38:07,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15161af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07, skipping insertion in model container [2019-10-15 01:38:07,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,633 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:38:07,651 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:38:07,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:07,856 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:38:07,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:38:07,896 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:38:07,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07 WrapperNode [2019-10-15 01:38:07,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:38:07,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:38:07,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:38:07,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:38:07,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:07,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... [2019-10-15 01:38:08,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:38:08,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:38:08,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:38:08,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:38:08,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:38:08,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:38:08,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:38:08,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:38:08,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:38:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:38:08,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:38:08,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:38:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:38:08,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:38:08,472 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:38:08,473 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:38:08,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08 BoogieIcfgContainer [2019-10-15 01:38:08,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:38:08,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:38:08,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:38:08,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:38:08,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:38:07" (1/3) ... [2019-10-15 01:38:08,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbcc209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:38:07" (2/3) ... [2019-10-15 01:38:08,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbcc209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:38:08, skipping insertion in model container [2019-10-15 01:38:08,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:38:08" (3/3) ... [2019-10-15 01:38:08,481 INFO L109 eAbstractionObserver]: Analyzing ICFG nr3.c [2019-10-15 01:38:08,491 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:38:08,499 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:38:08,509 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:38:08,529 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:38:08,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:38:08,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:38:08,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:38:08,530 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:38:08,530 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:38:08,530 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:38:08,530 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:38:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:38:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:38:08,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:08,551 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:08,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1583936272, now seen corresponding path program 1 times [2019-10-15 01:38:08,566 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:08,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149332372] [2019-10-15 01:38:08,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:08,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:08,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149332372] [2019-10-15 01:38:08,911 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:08,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:38:08,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159032743] [2019-10-15 01:38:08,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:38:08,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:38:08,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:08,940 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-10-15 01:38:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,051 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-15 01:38:09,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:38:09,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:38:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,063 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:38:09,063 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:38:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-15 01:38:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:38:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:38:09,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-10-15 01:38:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,119 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:38:09,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:38:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:38:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:38:09,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,122 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,122 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash 362962816, now seen corresponding path program 1 times [2019-10-15 01:38:09,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803177586] [2019-10-15 01:38:09,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,125 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803177586] [2019-10-15 01:38:09,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:38:09,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:38:09,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51759150] [2019-10-15 01:38:09,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:38:09,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:38:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:38:09,228 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-10-15 01:38:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:09,243 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:38:09,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:38:09,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:38:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:09,245 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:38:09,246 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:38:09,247 INFO L600 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 [2019-10-15 01:38:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:38:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:38:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:38:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:38:09,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-15 01:38:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:09,254 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:38:09,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:38:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:38:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:38:09,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:09,255 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:09,255 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:09,256 INFO L82 PathProgramCache]: Analyzing trace with hash -561578652, now seen corresponding path program 1 times [2019-10-15 01:38:09,256 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:09,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228557816] [2019-10-15 01:38:09,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:09,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228557816] [2019-10-15 01:38:09,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653740419] [2019-10-15 01:38:09,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:09,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:38:09,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:09,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091925029] [2019-10-15 01:38:09,480 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:09,480 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:09,487 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:09,496 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:09,497 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:09,672 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:10,133 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:10,921 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:10,976 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:10,988 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:11,435 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-15 01:38:11,719 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2019-10-15 01:38:12,232 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2019-10-15 01:38:12,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:12,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 17 [2019-10-15 01:38:12,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716984342] [2019-10-15 01:38:12,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:38:12,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:38:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:38:12,245 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 17 states. [2019-10-15 01:38:12,603 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-10-15 01:38:13,049 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-10-15 01:38:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:13,652 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-15 01:38:13,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:38:13,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:38:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:13,655 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:38:13,655 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:38:13,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:38:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:38:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-10-15 01:38:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:38:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-15 01:38:13,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2019-10-15 01:38:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:13,677 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-15 01:38:13,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:38:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-15 01:38:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:38:13,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:13,680 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:13,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:13,887 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1416286436, now seen corresponding path program 2 times [2019-10-15 01:38:13,888 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:13,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017175973] [2019-10-15 01:38:13,888 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:13,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:13,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:14,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017175973] [2019-10-15 01:38:14,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590132056] [2019-10-15 01:38:14,348 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:14,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:38:14,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:38:14,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:38:14,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:14,471 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:14,904 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-10-15 01:38:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:15,302 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:15,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420621705] [2019-10-15 01:38:15,749 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:38:15,749 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:15,750 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:15,750 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:15,750 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:15,795 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:38:15,993 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:16,482 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:16,507 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:16,512 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:17,117 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-15 01:38:17,460 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2019-10-15 01:38:18,161 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2019-10-15 01:38:18,162 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:18,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11, 12] total 38 [2019-10-15 01:38:18,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271730157] [2019-10-15 01:38:18,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:38:18,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:18,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:38:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:38:18,167 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 38 states. [2019-10-15 01:38:18,507 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-10-15 01:38:18,752 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-10-15 01:38:19,125 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2019-10-15 01:38:19,439 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2019-10-15 01:38:19,972 WARN L191 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2019-10-15 01:38:20,218 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2019-10-15 01:38:20,445 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2019-10-15 01:38:20,660 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2019-10-15 01:38:20,948 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2019-10-15 01:38:23,490 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-15 01:38:24,182 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-10-15 01:38:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:38:24,821 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-10-15 01:38:24,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:38:24,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 18 [2019-10-15 01:38:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:38:24,825 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:38:24,827 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:38:24,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=464, Invalid=3442, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 01:38:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:38:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2019-10-15 01:38:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:38:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-10-15 01:38:24,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 18 [2019-10-15 01:38:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:38:24,884 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-10-15 01:38:24,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:38:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-10-15 01:38:24,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:38:24,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:38:24,892 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:38:25,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:25,100 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:38:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:38:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash -293297956, now seen corresponding path program 1 times [2019-10-15 01:38:25,100 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:38:25,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276022118] [2019-10-15 01:38:25,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:25,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:38:25,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:38:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:25,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276022118] [2019-10-15 01:38:25,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619948518] [2019-10-15 01:38:25,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:38:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:38:25,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-15 01:38:25,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:38:25,893 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:26,124 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:26,276 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:26,400 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:28,877 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:38:34,599 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2019-10-15 01:38:34,855 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 37 [2019-10-15 01:38:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 21 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:38:35,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787704976] [2019-10-15 01:38:35,027 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:38:35,028 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:38:35,028 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:38:35,028 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:38:35,029 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:38:35,056 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:38:35,276 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:38:36,432 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-15 01:38:36,473 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:38:36,477 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:38:37,170 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-15 01:38:37,524 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2019-10-15 01:38:37,772 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 24 [2019-10-15 01:38:38,117 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2019-10-15 01:38:38,490 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2019-10-15 01:38:38,771 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:38:38,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17, 14] total 60 [2019-10-15 01:38:38,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172133025] [2019-10-15 01:38:38,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-15 01:38:38,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:38:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-15 01:38:38,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3122, Unknown=7, NotChecked=0, Total=3540 [2019-10-15 01:38:38,776 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 60 states. [2019-10-15 01:38:39,162 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2019-10-15 01:38:39,432 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-10-15 01:38:40,089 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2019-10-15 01:38:49,040 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57