java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 15:54:47,131 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 15:54:47,133 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 15:54:47,146 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 15:54:47,146 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 15:54:47,150 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 15:54:47,152 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 15:54:47,154 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 15:54:47,158 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 15:54:47,158 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 15:54:47,159 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 15:54:47,160 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 15:54:47,161 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 15:54:47,162 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 15:54:47,163 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 15:54:47,163 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 15:54:47,164 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 15:54:47,166 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 15:54:47,168 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 15:54:47,170 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 15:54:47,171 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 15:54:47,172 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 15:54:47,174 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 15:54:47,175 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 15:54:47,175 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 15:54:47,176 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 15:54:47,177 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 15:54:47,179 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 15:54:47,179 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 15:54:47,182 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 15:54:47,182 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 15:54:47,183 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 15:54:47,183 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 15:54:47,185 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 15:54:47,186 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 15:54:47,187 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 15:54:47,187 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 15:54:47,205 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 15:54:47,205 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 15:54:47,206 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 15:54:47,206 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 15:54:47,206 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 15:54:47,207 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 15:54:47,207 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 15:54:47,207 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 15:54:47,207 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 15:54:47,207 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 15:54:47,208 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 15:54:47,208 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 15:54:47,210 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 15:54:47,210 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 15:54:47,210 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 15:54:47,210 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 15:54:47,211 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 15:54:47,212 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 15:54:47,212 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 15:54:47,212 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 15:54:47,212 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 15:54:47,213 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 15:54:47,213 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 15:54:47,213 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 15:54:47,213 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 15:54:47,214 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 15:54:47,215 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 15:54:47,215 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 15:54:47,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 15:54:47,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 15:54:47,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 15:54:47,308 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 15:54:47,311 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 15:54:47,312 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-09-14 15:54:47,661 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22a9f29f9/93745f1d58474300b8af77d003e45b91/FLAG8d64c5a47 [2018-09-14 15:54:47,800 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 15:54:47,801 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-09-14 15:54:47,806 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22a9f29f9/93745f1d58474300b8af77d003e45b91/FLAG8d64c5a47 [2018-09-14 15:54:47,822 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22a9f29f9/93745f1d58474300b8af77d003e45b91 [2018-09-14 15:54:47,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 15:54:47,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 15:54:47,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 15:54:47,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 15:54:47,846 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 15:54:47,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:54:47" (1/1) ... [2018-09-14 15:54:47,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c00197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:47, skipping insertion in model container [2018-09-14 15:54:47,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 03:54:47" (1/1) ... [2018-09-14 15:54:47,863 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 15:54:48,096 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:54:48,114 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 15:54:48,118 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 15:54:48,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48 WrapperNode [2018-09-14 15:54:48,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 15:54:48,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 15:54:48,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 15:54:48,135 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 15:54:48,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 15:54:48,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 15:54:48,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 15:54:48,160 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 15:54:48,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (1/1) ... [2018-09-14 15:54:48,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 15:54:48,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 15:54:48,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 15:54:48,184 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 15:54:48,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (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 [2018-09-14 15:54:48,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 15:54:48,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 15:54:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 15:54:48,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 15:54:48,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 15:54:48,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 15:54:48,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-14 15:54:48,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-14 15:54:48,546 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 15:54:48,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:54:48 BoogieIcfgContainer [2018-09-14 15:54:48,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 15:54:48,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 15:54:48,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 15:54:48,567 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 15:54:48,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 03:54:47" (1/3) ... [2018-09-14 15:54:48,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcb7e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:54:48, skipping insertion in model container [2018-09-14 15:54:48,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 03:54:48" (2/3) ... [2018-09-14 15:54:48,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcb7e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 03:54:48, skipping insertion in model container [2018-09-14 15:54:48,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 03:54:48" (3/3) ... [2018-09-14 15:54:48,571 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-09-14 15:54:48,592 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 15:54:48,601 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 15:54:48,666 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 15:54:48,667 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 15:54:48,667 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 15:54:48,667 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 15:54:48,667 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 15:54:48,667 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 15:54:48,667 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 15:54:48,667 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 15:54:48,668 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 15:54:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-14 15:54:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-14 15:54:48,690 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:48,691 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:48,692 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:48,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1152414567, now seen corresponding path program 1 times [2018-09-14 15:54:48,700 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:48,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:48,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:48,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:48,745 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:48,819 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:54:48,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-14 15:54:48,819 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:54:48,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-14 15:54:48,838 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-14 15:54:48,838 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:54:48,841 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-09-14 15:54:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:54:48,863 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-09-14 15:54:48,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-14 15:54:48,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-09-14 15:54:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:54:48,875 INFO L225 Difference]: With dead ends: 33 [2018-09-14 15:54:48,875 INFO L226 Difference]: Without dead ends: 14 [2018-09-14 15:54:48,879 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-14 15:54:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-14 15:54:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-14 15:54:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-14 15:54:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-14 15:54:48,921 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-14 15:54:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:54:48,922 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-14 15:54:48,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-14 15:54:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-14 15:54:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-14 15:54:48,924 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:48,925 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:48,925 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1083883255, now seen corresponding path program 1 times [2018-09-14 15:54:48,926 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:48,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:48,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:48,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:48,929 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:48,942 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-14 15:54:48,942 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-14 15:54:48,942 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2018-09-14 15:54:48,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:48,959 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-09-14 15:54:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:49,022 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-09-14 15:54:49,023 INFO L423 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-09-14 15:54:49,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:49,023 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:54:49,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:49,031 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:54:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:49,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:54:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:49,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:54:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:49,172 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-09-14 15:54:49,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-09-14 15:54:49,172 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 15:54:49,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 15:54:49,173 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 15:54:49,173 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 15:54:49,173 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2018-09-14 15:54:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:54:49,209 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-14 15:54:49,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 15:54:49,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-09-14 15:54:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:54:49,211 INFO L225 Difference]: With dead ends: 22 [2018-09-14 15:54:49,211 INFO L226 Difference]: Without dead ends: 17 [2018-09-14 15:54:49,212 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 15:54:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-14 15:54:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-09-14 15:54:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-14 15:54:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-14 15:54:49,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-09-14 15:54:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:54:49,219 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-14 15:54:49,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 15:54:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-14 15:54:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-14 15:54:49,220 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:49,221 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:49,221 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1128913667, now seen corresponding path program 1 times [2018-09-14 15:54:49,222 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:49,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:49,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:49,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:49,223 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:49,233 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-14 15:54:49,233 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-14 15:54:49,234 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2018-09-14 15:54:49,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:49,249 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-09-14 15:54:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:49,286 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-09-14 15:54:49,288 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [19], [26], [29], [31], [37], [38], [39], [41] [2018-09-14 15:54:49,334 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-09-14 15:54:49,335 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2018-09-14 15:54:49,677 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-09-14 15:54:49,679 INFO L272 AbstractInterpreter]: Visited 14 different actions 112 times. Merged at 4 different actions 51 times. Widened at 1 different actions 9 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-09-14 15:54:49,724 INFO L423 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-09-14 15:54:49,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:49,725 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-14 15:54:49,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:49,737 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:54:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:49,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:54:50,121 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-09-14 15:54:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:50,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:54:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:50,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:50,683 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:54:50,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:50,698 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 15:54:50,716 ERROR L236 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-09-14 15:54:50,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-14 15:54:50,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-09-14 15:54:50,717 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:54:50,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-14 15:54:50,718 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-14 15:54:50,719 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-09-14 15:54:50,720 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2018-09-14 15:54:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:54:50,900 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-14 15:54:50,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-14 15:54:50,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-09-14 15:54:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:54:50,901 INFO L225 Difference]: With dead ends: 24 [2018-09-14 15:54:50,902 INFO L226 Difference]: Without dead ends: 19 [2018-09-14 15:54:50,903 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-14 15:54:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-14 15:54:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-14 15:54:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-14 15:54:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-14 15:54:50,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2018-09-14 15:54:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:54:50,908 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-14 15:54:50,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-14 15:54:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-14 15:54:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-14 15:54:50,909 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:50,909 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:50,909 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1694846089, now seen corresponding path program 2 times [2018-09-14 15:54:50,910 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:50,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:50,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 15:54:50,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:50,911 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:50,918 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-14 15:54:50,918 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-14 15:54:50,919 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-14 15:54:50,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:54:50,934 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-09-14 15:54:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:50,961 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-09-14 15:54:50,961 INFO L423 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-09-14 15:54:50,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:50,961 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:54:50,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:54:50,970 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:54:50,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-14 15:54:50,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:54:50,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:54:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:51,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:54:51,765 WARN L1001 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) is different from true [2018-09-14 15:54:51,794 WARN L1001 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-09-14 15:54:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2018-09-14 15:54:51,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:51,880 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:54:51,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-14 15:54:51,896 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-14 15:54:51,909 ERROR L236 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-09-14 15:54:51,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-14 15:54:51,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-09-14 15:54:51,910 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:54:51,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-14 15:54:51,910 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-14 15:54:51,911 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=199, Unknown=2, NotChecked=58, Total=306 [2018-09-14 15:54:51,911 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-14 15:54:52,579 WARN L1001 $PredicateComparison]: unable to prove that (and (or (< c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0))) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0))))) is different from true [2018-09-14 15:54:52,733 WARN L1001 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2018-09-14 15:54:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:54:52,825 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-09-14 15:54:52,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-14 15:54:52,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-14 15:54:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:54:52,827 INFO L225 Difference]: With dead ends: 34 [2018-09-14 15:54:52,827 INFO L226 Difference]: Without dead ends: 28 [2018-09-14 15:54:52,828 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=388, Unknown=4, NotChecked=172, Total=650 [2018-09-14 15:54:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-14 15:54:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-14 15:54:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-14 15:54:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-14 15:54:52,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2018-09-14 15:54:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:54:52,838 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-14 15:54:52,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-14 15:54:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-14 15:54:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-14 15:54:52,839 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:52,839 INFO L376 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:52,839 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1287303683, now seen corresponding path program 3 times [2018-09-14 15:54:52,840 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:52,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:52,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:54:52,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:52,841 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:52,851 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-14 15:54:52,852 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-14 15:54:52,852 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-14 15:54:52,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:54:52,873 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-09-14 15:54:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:52,917 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-09-14 15:54:52,918 INFO L423 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-09-14 15:54:52,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:52,918 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:54:52,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-14 15:54:52,928 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-14 15:54:52,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-14 15:54:52,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:54:52,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:54:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:53,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:54:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:54,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:54,396 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:54:54,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-14 15:54:54,412 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-14 15:54:54,424 ERROR L236 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-09-14 15:54:54,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-14 15:54:54,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-09-14 15:54:54,425 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:54:54,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-14 15:54:54,427 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-14 15:54:54,428 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2018-09-14 15:54:54,428 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 30 states. [2018-09-14 15:54:55,368 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-09-14 15:54:56,093 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2018-09-14 15:54:57,505 WARN L178 SmtUtils]: Spent 792.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2018-09-14 15:54:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:54:57,524 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-09-14 15:54:57,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-14 15:54:57,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 27 [2018-09-14 15:54:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:54:57,526 INFO L225 Difference]: With dead ends: 52 [2018-09-14 15:54:57,526 INFO L226 Difference]: Without dead ends: 46 [2018-09-14 15:54:57,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2018-09-14 15:54:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-14 15:54:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-14 15:54:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-14 15:54:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-14 15:54:57,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 27 [2018-09-14 15:54:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:54:57,542 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-14 15:54:57,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-14 15:54:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-14 15:54:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-14 15:54:57,544 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 15:54:57,544 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 15:54:57,545 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 15:54:57,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2121024643, now seen corresponding path program 4 times [2018-09-14 15:54:57,545 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 15:54:57,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:57,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:54:57,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 15:54:57,547 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 15:54:57,562 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-14 15:54:57,562 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-14 15:54:57,563 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-14 15:54:57,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-14 15:54:57,599 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-09-14 15:54:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 15:54:57,647 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-09-14 15:54:57,647 INFO L423 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-09-14 15:54:57,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:54:57,647 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 15:54:57,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-14 15:54:57,655 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-14 15:54:57,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-14 15:54:57,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-14 15:54:57,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 15:54:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 15:54:58,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 15:54:58,671 WARN L1001 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-09-14 15:55:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 10 not checked. [2018-09-14 15:55:01,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 15:55:01,360 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 15:55:01,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-14 15:55:01,378 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-14 15:55:01,407 ERROR L236 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-09-14 15:55:01,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-14 15:55:01,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2018-09-14 15:55:01,408 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 15:55:01,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-14 15:55:01,409 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-14 15:55:01,409 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1034, Unknown=2, NotChecked=64, Total=1190 [2018-09-14 15:55:01,410 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 35 states. [2018-09-14 15:55:02,583 WARN L1001 $PredicateComparison]: unable to prove that (and (or (< c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0))) (= c_main_~i~0 8) (= c_main_~sum~0 (+ c_main_~i~0 28)) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0))))) is different from true [2018-09-14 15:55:03,154 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-09-14 15:55:05,378 WARN L178 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 15:55:11,595 WARN L178 SmtUtils]: Spent 5.00 s on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 15:55:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 15:55:11,881 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-09-14 15:55:11,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-14 15:55:11,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 45 [2018-09-14 15:55:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 15:55:11,884 INFO L225 Difference]: With dead ends: 50 [2018-09-14 15:55:11,884 INFO L226 Difference]: Without dead ends: 0 [2018-09-14 15:55:11,886 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=251, Invalid=3293, Unknown=4, NotChecked=234, Total=3782 [2018-09-14 15:55:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-14 15:55:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-14 15:55:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-14 15:55:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-14 15:55:11,887 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2018-09-14 15:55:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 15:55:11,888 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-14 15:55:11,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-14 15:55:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-14 15:55:11,888 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-14 15:55:11,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-14 15:55:14,333 WARN L178 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 99 DAG size of output: 19 [2018-09-14 15:55:14,397 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-09-14 15:55:14,397 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:55:14,397 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-09-14 15:55:14,397 INFO L429 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-09-14 15:55:14,398 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-09-14 15:55:14,398 INFO L429 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-09-14 15:55:14,398 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-09-14 15:55:14,399 INFO L426 ceAbstractionStarter]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2018-09-14 15:55:14,399 INFO L422 ceAbstractionStarter]: At program point L15-4(lines 15 17) the Hoare annotation is: (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 main_~i~0) (* 2 main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< main_~i~0 main_~n~0) (< main_~n~0 main_~i~0))) (or (<= main_~i~0 main_~n~0) (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)))) [2018-09-14 15:55:14,399 INFO L422 ceAbstractionStarter]: At program point L15-5(lines 15 17) the Hoare annotation is: (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)) [2018-09-14 15:55:14,399 INFO L429 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-09-14 15:55:14,399 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-09-14 15:55:14,399 INFO L426 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-09-14 15:55:14,399 INFO L426 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-09-14 15:55:14,399 INFO L426 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-09-14 15:55:14,400 INFO L426 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-09-14 15:55:14,404 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,404 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,405 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,405 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,411 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,411 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,411 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,412 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 03:55:14 BoogieIcfgContainer [2018-09-14 15:55:14,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 15:55:14,415 INFO L168 Benchmark]: Toolchain (without parser) took 26582.15 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 858.8 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -529.1 MB). Peak memory consumption was 329.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:55:14,417 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:55:14,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-14 15:55:14,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:55:14,419 INFO L168 Benchmark]: Boogie Preprocessor took 23.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 15:55:14,419 INFO L168 Benchmark]: RCFGBuilder took 364.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-09-14 15:55:14,420 INFO L168 Benchmark]: TraceAbstraction took 25858.76 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 129.5 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 242.4 MB). Peak memory consumption was 371.9 MB. Max. memory is 7.1 GB. [2018-09-14 15:55:14,424 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 24.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 364.09 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.1 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25858.76 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 129.5 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 242.4 MB). Peak memory consumption was 371.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant [2018-09-14 15:55:14,435 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,435 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,435 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,435 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,436 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,437 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,437 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-09-14 15:55:14,437 WARN L382 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: (forall main_~n~0 : int :: (2 * i + 2 * sum == (main_~n~0 + 1) * main_~n~0 || i < main_~n~0) || main_~n~0 < i) && (i <= n || 2 * sum == (n + 1) * n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 25.7s OverallTime, 6 OverallIterations, 12 TraceHistogramMax, 14.7s AutomataDifference, 0.0s DeadEndRemovalTime, 2.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 37 SDslu, 784 SDs, 0 SdLazy, 979 SolverSat, 112 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 129 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 34 NumberOfFragments, 49 HoareAnnotationTreeSize, 15 FomulaSimplifications, 427 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 809 FormulaSimplificationTreeSizeReductionInter, 2.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.9s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 234 ConstructedInterpolants, 37 QuantifiedInterpolants, 71037 SizeOfPredicates, 18 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 155/472 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum_true-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_15-55-14-443.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum_true-unreach-call_true-termination.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_15-55-14-443.csv Received shutdown request...