/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:20:41,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:20:41,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:20:41,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:20:41,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:20:41,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:20:41,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:20:41,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:20:41,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:20:41,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:20:41,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:20:41,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:20:41,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:20:41,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:20:41,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:20:41,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:20:41,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:20:41,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:20:41,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:20:41,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:20:41,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:20:41,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:20:41,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:20:41,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:20:41,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 23:20:41,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 23:20:41,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 23:20:41,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 23:20:41,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 23:20:41,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 23:20:41,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:20:41,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:20:41,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:20:41,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:20:41,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:20:41,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:20:41,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:20:41,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:20:41,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:20:41,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:20:41,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:20:41,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:20:41,203 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:20:41,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:20:41,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:20:41,204 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:20:41,204 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:20:41,204 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:20:41,204 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:20:41,205 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:20:41,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:20:41,205 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:20:41,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:20:41,205 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:20:41,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:20:41,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:20:41,206 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:20:41,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:20:41,207 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:20:41,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:20:41,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:20:41,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:20:41,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:20:41,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:20:41,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:20:41,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:20:41,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:41,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:20:41,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:20:41,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:20:41,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:20:41,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:20:41,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:20:41,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:20:41,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:20:41,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:20:41,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:20:41,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:20:41,518 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:20:41,518 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:20:41,519 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-23 23:20:41,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1cbd5101/87d04c6588054f50ac42cfde4d92bf5d/FLAG922663be2 [2019-11-23 23:20:42,068 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:20:42,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-23 23:20:42,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1cbd5101/87d04c6588054f50ac42cfde4d92bf5d/FLAG922663be2 [2019-11-23 23:20:42,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1cbd5101/87d04c6588054f50ac42cfde4d92bf5d [2019-11-23 23:20:42,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:20:42,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:20:42,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:42,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:20:42,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:20:42,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779cd5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42, skipping insertion in model container [2019-11-23 23:20:42,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:20:42,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:20:42,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:42,718 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:20:42,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:42,850 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:20:42,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42 WrapperNode [2019-11-23 23:20:42,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:42,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:42,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:20:42,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:20:42,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:42,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:20:42,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:20:42,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:20:42,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (1/1) ... [2019-11-23 23:20:42,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:20:42,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:20:42,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:20:42,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:20:42,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (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 [2019-11-23 23:20:42,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:20:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:20:42,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:20:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:20:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:20:42,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:20:43,410 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:20:43,411 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 23:20:43,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:43 BoogieIcfgContainer [2019-11-23 23:20:43,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:20:43,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:20:43,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:20:43,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:20:43,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:42" (1/3) ... [2019-11-23 23:20:43,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229d4536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:43, skipping insertion in model container [2019-11-23 23:20:43,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:42" (2/3) ... [2019-11-23 23:20:43,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229d4536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:43, skipping insertion in model container [2019-11-23 23:20:43,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:43" (3/3) ... [2019-11-23 23:20:43,420 INFO L109 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2019-11-23 23:20:43,428 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:20:43,435 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:20:43,446 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:20:43,468 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:20:43,468 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:20:43,469 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:20:43,469 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:20:43,469 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:20:43,469 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:20:43,469 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:20:43,469 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:20:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-23 23:20:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:20:43,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:43,490 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:43,491 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1729263583, now seen corresponding path program 1 times [2019-11-23 23:20:43,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:43,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452449478] [2019-11-23 23:20:43,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:43,572 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:43,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344206501] [2019-11-23 23:20:43,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 23:20:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:43,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:43,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:43,701 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:43,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452449478] [2019-11-23 23:20:43,715 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:43,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344206501] [2019-11-23 23:20:43,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:43,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:20:43,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572054610] [2019-11-23 23:20:43,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:20:43,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:20:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:43,738 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2019-11-23 23:20:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:43,809 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2019-11-23 23:20:43,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:20:43,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-23 23:20:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:43,822 INFO L225 Difference]: With dead ends: 28 [2019-11-23 23:20:43,822 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:20:43,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:20:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 23:20:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 23:20:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2019-11-23 23:20:43,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 8 [2019-11-23 23:20:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:43,860 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2019-11-23 23:20:43,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:20:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2019-11-23 23:20:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:20:43,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:43,862 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:44,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:44,069 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1292688267, now seen corresponding path program 1 times [2019-11-23 23:20:44,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:44,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029535569] [2019-11-23 23:20:44,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:44,079 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:44,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526446454] [2019-11-23 23:20:44,079 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 [2019-11-23 23:20:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:44,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:44,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:44,148 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:44,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029535569] [2019-11-23 23:20:44,171 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:44,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526446454] [2019-11-23 23:20:44,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:44,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:44,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387262738] [2019-11-23 23:20:44,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:44,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:44,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:44,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:44,174 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand 6 states. [2019-11-23 23:20:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:44,269 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2019-11-23 23:20:44,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:44,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-23 23:20:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:44,271 INFO L225 Difference]: With dead ends: 48 [2019-11-23 23:20:44,272 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 23:20:44,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 23:20:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-11-23 23:20:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 23:20:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2019-11-23 23:20:44,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 12 [2019-11-23 23:20:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:44,284 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2019-11-23 23:20:44,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2019-11-23 23:20:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 23:20:44,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:44,286 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:44,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:44,499 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -35486143, now seen corresponding path program 1 times [2019-11-23 23:20:44,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:44,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90892229] [2019-11-23 23:20:44,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:44,506 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:44,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305167713] [2019-11-23 23:20:44,507 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 [2019-11-23 23:20:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:44,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:44,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 23:20:44,582 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 23:20:44,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90892229] [2019-11-23 23:20:44,629 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:44,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305167713] [2019-11-23 23:20:44,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:44,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:44,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755086430] [2019-11-23 23:20:44,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:44,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:44,633 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand 6 states. [2019-11-23 23:20:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:44,743 INFO L93 Difference]: Finished difference Result 84 states and 135 transitions. [2019-11-23 23:20:44,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:44,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-23 23:20:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:44,745 INFO L225 Difference]: With dead ends: 84 [2019-11-23 23:20:44,745 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 23:20:44,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 23:20:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-23 23:20:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 23:20:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 79 transitions. [2019-11-23 23:20:44,775 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 79 transitions. Word has length 20 [2019-11-23 23:20:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:44,775 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 79 transitions. [2019-11-23 23:20:44,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 79 transitions. [2019-11-23 23:20:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 23:20:44,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:44,779 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:44,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:44,983 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2053358287, now seen corresponding path program 1 times [2019-11-23 23:20:44,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:44,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639821783] [2019-11-23 23:20:44,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:44,990 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:44,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595411301] [2019-11-23 23:20:44,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:45,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:45,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-23 23:20:45,068 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-23 23:20:45,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639821783] [2019-11-23 23:20:45,088 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:45,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595411301] [2019-11-23 23:20:45,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:45,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:45,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858623742] [2019-11-23 23:20:45,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:45,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:45,090 INFO L87 Difference]: Start difference. First operand 54 states and 79 transitions. Second operand 6 states. [2019-11-23 23:20:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:45,179 INFO L93 Difference]: Finished difference Result 138 states and 214 transitions. [2019-11-23 23:20:45,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:45,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2019-11-23 23:20:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:45,182 INFO L225 Difference]: With dead ends: 138 [2019-11-23 23:20:45,183 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 23:20:45,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 23:20:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 23:20:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 23:20:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2019-11-23 23:20:45,231 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 36 [2019-11-23 23:20:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:45,231 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2019-11-23 23:20:45,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2019-11-23 23:20:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 23:20:45,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:45,234 INFO L410 BasicCegarLoop]: trace histogram [16, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:45,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:45,439 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash 441927217, now seen corresponding path program 1 times [2019-11-23 23:20:45,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:45,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350160995] [2019-11-23 23:20:45,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:45,446 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:45,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58313054] [2019-11-23 23:20:45,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:45,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:20:45,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 23:20:45,562 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 23:20:45,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350160995] [2019-11-23 23:20:45,599 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:45,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58313054] [2019-11-23 23:20:45,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635433430] [2019-11-23 23:20:45,625 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-23 23:20:45,626 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:45,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:45,640 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:45,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:20:47,531 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 149 [2019-11-23 23:20:47,653 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 149 [2019-11-23 23:20:47,814 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2019-11-23 23:20:48,568 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2019-11-23 23:20:48,808 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 157 [2019-11-23 23:20:49,080 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 159 [2019-11-23 23:20:50,657 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-11-23 23:20:54,745 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2019-11-23 23:21:13,171 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 252 [2019-11-23 23:21:22,163 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 270 [2019-11-23 23:21:25,863 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 276 [2019-11-23 23:21:27,973 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 281 [2019-11-23 23:21:28,165 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-23 23:21:28,286 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 283 [2019-11-23 23:21:30,211 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 288 [2019-11-23 23:21:34,338 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 299 [2019-11-23 23:21:34,491 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 294 [2019-11-23 23:21:34,725 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2019-11-23 23:21:36,826 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2019-11-23 23:21:36,974 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 299 [2019-11-23 23:21:39,206 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 303 [2019-11-23 23:21:41,338 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 310 [2019-11-23 23:21:41,458 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 308 [2019-11-23 23:21:43,767 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2019-11-23 23:21:43,889 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 312 [2019-11-23 23:21:46,104 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2019-11-23 23:21:46,267 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 311 [2019-11-23 23:21:46,535 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-23 23:21:48,982 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-23 23:21:51,346 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 319 [2019-11-23 23:21:53,609 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 324 [2019-11-23 23:21:53,729 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 322 [2019-11-23 23:21:56,105 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:21:56,225 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 326 [2019-11-23 23:21:58,529 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-23 23:21:58,663 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 330 [2019-11-23 23:22:01,087 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 335 [2019-11-23 23:22:01,230 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 333 [2019-11-23 23:22:03,592 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 338 [2019-11-23 23:22:03,763 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 336 [2019-11-23 23:22:03,904 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:22:06,872 WARN L192 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:22:07,196 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 343 [2019-11-23 23:22:10,058 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 344 [2019-11-23 23:22:10,193 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 23:22:10,328 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 346 [2019-11-23 23:22:13,632 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:22:13,754 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2019-11-23 23:22:16,483 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 358 [2019-11-23 23:22:16,644 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 353 [2019-11-23 23:22:16,800 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 23:22:16,927 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355