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/eca-rers2012/Problem15_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:52:21,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:52:21,980 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:52:21,993 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:52:21,993 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:52:21,994 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:52:21,998 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:52:22,000 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:52:22,003 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:52:22,004 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:52:22,013 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:52:22,013 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:52:22,014 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:52:22,016 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:52:22,018 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:52:22,021 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:52:22,022 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:52:22,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:52:22,030 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:52:22,034 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:52:22,035 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:52:22,037 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:52:22,041 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:52:22,041 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:52:22,042 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:52:22,043 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:52:22,044 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:52:22,045 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:52:22,046 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:52:22,047 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:52:22,049 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:52:22,050 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 11:52:22,052 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 11:52:22,052 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 11:52:22,053 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 11:52:22,055 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 11:52:22,056 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 [2018-09-18 11:52:22,083 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:52:22,083 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:52:22,084 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:52:22,085 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:52:22,085 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:52:22,085 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:52:22,085 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:52:22,086 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:52:22,086 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:52:22,086 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:52:22,087 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:52:22,087 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:52:22,088 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:52:22,088 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:52:22,088 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:52:22,088 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:52:22,088 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:52:22,089 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:52:22,089 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:52:22,089 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:52:22,091 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:52:22,091 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:52:22,091 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:52:22,092 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:52:22,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:52:22,092 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:52:22,092 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:52:22,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:52:22,093 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:52:22,093 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:52:22,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:52:22,093 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:52:22,093 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:52:22,094 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:52:22,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:52:22,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:52:22,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:52:22,190 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:52:22,190 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:52:22,191 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label05_true-unreach-call.c [2018-09-18 11:52:22,554 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e0d2846/5cc456e96f2d499cb170b968453744d8/FLAG3807e8215 [2018-09-18 11:52:22,920 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:52:22,921 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label05_true-unreach-call.c [2018-09-18 11:52:22,947 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e0d2846/5cc456e96f2d499cb170b968453744d8/FLAG3807e8215 [2018-09-18 11:52:22,971 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e0d2846/5cc456e96f2d499cb170b968453744d8 [2018-09-18 11:52:22,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:52:22,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:52:22,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:52:22,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:52:22,993 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:52:22,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:52:22" (1/1) ... [2018-09-18 11:52:22,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3596d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:22, skipping insertion in model container [2018-09-18 11:52:23,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:52:22" (1/1) ... [2018-09-18 11:52:23,012 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:52:23,932 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:52:23,955 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:52:24,252 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:52:24,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24 WrapperNode [2018-09-18 11:52:24,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:52:24,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:52:24,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:52:24,371 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:52:24,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:24,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:24,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:52:24,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:52:24,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:52:24,666 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:52:25,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (1/1) ... [2018-09-18 11:52:25,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:52:25,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:52:25,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:52:25,421 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:52:25,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (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 [2018-09-18 11:52:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:52:25,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:52:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 11:52:25,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 11:52:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:52:25,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:52:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:52:25,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:52:25,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:52:25,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:52:32,064 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:52:32,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:52:32 BoogieIcfgContainer [2018-09-18 11:52:32,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:52:32,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:52:32,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:52:32,070 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:52:32,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:52:22" (1/3) ... [2018-09-18 11:52:32,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5175528c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:52:32, skipping insertion in model container [2018-09-18 11:52:32,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:52:24" (2/3) ... [2018-09-18 11:52:32,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5175528c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:52:32, skipping insertion in model container [2018-09-18 11:52:32,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:52:32" (3/3) ... [2018-09-18 11:52:32,074 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label05_true-unreach-call.c [2018-09-18 11:52:32,085 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:52:32,094 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:52:32,153 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:52:32,154 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:52:32,154 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:52:32,154 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:52:32,155 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:52:32,155 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:52:32,155 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:52:32,155 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:52:32,155 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:52:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-18 11:52:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-18 11:52:32,213 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:52:32,214 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:52:32,215 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:52:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1575341511, now seen corresponding path program 1 times [2018-09-18 11:52:32,224 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:52:32,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:32,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:52:32,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:32,277 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:52:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:52:32,847 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-09-18 11:52:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:52:32,884 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:52:32,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:52:32,884 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:52:32,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:52:32,910 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:52:32,910 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:52:32,913 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-09-18 11:52:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:52:43,181 INFO L93 Difference]: Finished difference Result 1514 states and 2777 transitions. [2018-09-18 11:52:43,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:52:43,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2018-09-18 11:52:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:52:43,207 INFO L225 Difference]: With dead ends: 1514 [2018-09-18 11:52:43,208 INFO L226 Difference]: Without dead ends: 1070 [2018-09-18 11:52:43,220 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:52:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-18 11:52:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2018-09-18 11:52:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-09-18 11:52:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1675 transitions. [2018-09-18 11:52:43,372 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1675 transitions. Word has length 71 [2018-09-18 11:52:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:52:43,373 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1675 transitions. [2018-09-18 11:52:43,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:52:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1675 transitions. [2018-09-18 11:52:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-18 11:52:43,383 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:52:43,383 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:52:43,384 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:52:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1668103027, now seen corresponding path program 1 times [2018-09-18 11:52:43,384 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:52:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:43,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:52:43,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:43,386 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:52:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:52:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:52:43,701 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:52:43,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:52:43,701 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:52:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:52:43,703 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:52:43,704 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:52:43,704 INFO L87 Difference]: Start difference. First operand 1068 states and 1675 transitions. Second operand 4 states. [2018-09-18 11:52:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:52:49,998 INFO L93 Difference]: Finished difference Result 3988 states and 6459 transitions. [2018-09-18 11:52:50,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:52:50,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-09-18 11:52:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:52:50,025 INFO L225 Difference]: With dead ends: 3988 [2018-09-18 11:52:50,026 INFO L226 Difference]: Without dead ends: 2926 [2018-09-18 11:52:50,036 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:52:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2018-09-18 11:52:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2613. [2018-09-18 11:52:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2613 states. [2018-09-18 11:52:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3832 transitions. [2018-09-18 11:52:50,149 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3832 transitions. Word has length 141 [2018-09-18 11:52:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:52:50,149 INFO L480 AbstractCegarLoop]: Abstraction has 2613 states and 3832 transitions. [2018-09-18 11:52:50,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:52:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3832 transitions. [2018-09-18 11:52:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-09-18 11:52:50,171 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:52:50,172 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:52:50,172 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:52:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -473847581, now seen corresponding path program 1 times [2018-09-18 11:52:50,173 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:52:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:50,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:52:50,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:52:50,175 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:52:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:52:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 200 proven. 237 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-18 11:52:51,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:52:51,001 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:52:51,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:52:51,012 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:52:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:52:51,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:52:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 308 proven. 2 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-18 11:52:52,216 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:52:52,483 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-18 11:52:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 202 proven. 241 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:52:53,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:52:53,097 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 3 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 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:52:53,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:52:53,130 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:52:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:52:53,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:52:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-18 11:52:53,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:52:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 369 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-18 11:52:54,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:52:54,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8, 5, 5] total 21 [2018-09-18 11:52:54,206 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:52:54,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-18 11:52:54,213 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-18 11:52:54,213 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2018-09-18 11:52:54,214 INFO L87 Difference]: Start difference. First operand 2613 states and 3832 transitions. Second operand 11 states. [2018-09-18 11:52:57,069 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-18 11:53:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:53:30,151 INFO L93 Difference]: Finished difference Result 22006 states and 34086 transitions. [2018-09-18 11:53:30,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-18 11:53:30,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2018-09-18 11:53:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:53:30,287 INFO L225 Difference]: With dead ends: 22006 [2018-09-18 11:53:30,288 INFO L226 Difference]: Without dead ends: 19399 [2018-09-18 11:53:30,358 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1494 GetRequests, 1423 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=947, Invalid=4023, Unknown=0, NotChecked=0, Total=4970 [2018-09-18 11:53:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19399 states. [2018-09-18 11:53:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19399 to 19171. [2018-09-18 11:53:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19171 states. [2018-09-18 11:53:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19171 states to 19171 states and 25204 transitions. [2018-09-18 11:53:30,909 INFO L78 Accepts]: Start accepts. Automaton has 19171 states and 25204 transitions. Word has length 347 [2018-09-18 11:53:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:53:30,910 INFO L480 AbstractCegarLoop]: Abstraction has 19171 states and 25204 transitions. [2018-09-18 11:53:30,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-18 11:53:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19171 states and 25204 transitions. [2018-09-18 11:53:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-09-18 11:53:30,933 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:53:30,933 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:53:30,933 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:53:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 970013832, now seen corresponding path program 1 times [2018-09-18 11:53:30,934 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:53:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:30,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:30,935 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:53:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:53:31,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:53:31,683 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:53:31,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:31,888 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:53:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:32,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:53:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:53:32,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:53:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:53:32,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:53:32,598 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 5 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 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:53:32,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:32,614 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:53:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:32,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:53:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:53:33,028 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:53:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:53:33,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:53:33,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:53:33,209 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:53:33,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:53:33,211 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:53:33,211 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:53:33,212 INFO L87 Difference]: Start difference. First operand 19171 states and 25204 transitions. Second operand 9 states. [2018-09-18 11:53:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:53:44,371 INFO L93 Difference]: Finished difference Result 51705 states and 76685 transitions. [2018-09-18 11:53:44,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 11:53:44,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 372 [2018-09-18 11:53:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:53:44,588 INFO L225 Difference]: With dead ends: 51705 [2018-09-18 11:53:44,588 INFO L226 Difference]: Without dead ends: 32540 [2018-09-18 11:53:44,733 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1484 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2018-09-18 11:53:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32540 states. [2018-09-18 11:53:45,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32540 to 32273. [2018-09-18 11:53:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32273 states. [2018-09-18 11:53:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32273 states to 32273 states and 42363 transitions. [2018-09-18 11:53:45,669 INFO L78 Accepts]: Start accepts. Automaton has 32273 states and 42363 transitions. Word has length 372 [2018-09-18 11:53:45,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:53:45,672 INFO L480 AbstractCegarLoop]: Abstraction has 32273 states and 42363 transitions. [2018-09-18 11:53:45,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:53:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32273 states and 42363 transitions. [2018-09-18 11:53:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-09-18 11:53:45,732 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:53:45,732 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:53:45,733 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:53:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1760451353, now seen corresponding path program 1 times [2018-09-18 11:53:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:53:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:45,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:45,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:45,735 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:53:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:53:46,633 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:53:46,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:53:46,633 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:53:46,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:53:46,634 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:53:46,634 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:53:46,635 INFO L87 Difference]: Start difference. First operand 32273 states and 42363 transitions. Second operand 3 states. [2018-09-18 11:53:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:53:54,330 INFO L93 Difference]: Finished difference Result 69044 states and 95279 transitions. [2018-09-18 11:53:54,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:53:54,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 513 [2018-09-18 11:53:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:53:54,541 INFO L225 Difference]: With dead ends: 69044 [2018-09-18 11:53:54,541 INFO L226 Difference]: Without dead ends: 36777 [2018-09-18 11:53:54,765 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:53:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36777 states. [2018-09-18 11:53:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36777 to 36773. [2018-09-18 11:53:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36773 states. [2018-09-18 11:53:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36773 states to 36773 states and 48887 transitions. [2018-09-18 11:53:55,782 INFO L78 Accepts]: Start accepts. Automaton has 36773 states and 48887 transitions. Word has length 513 [2018-09-18 11:53:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:53:55,783 INFO L480 AbstractCegarLoop]: Abstraction has 36773 states and 48887 transitions. [2018-09-18 11:53:55,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:53:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36773 states and 48887 transitions. [2018-09-18 11:53:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2018-09-18 11:53:55,933 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:53:55,934 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:53:55,934 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:53:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1014883175, now seen corresponding path program 1 times [2018-09-18 11:53:55,935 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:53:55,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:55,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:55,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:53:55,936 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:53:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:53:56,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:53:56,965 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:53:56,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:56,977 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:53:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:57,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:53:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:53:57,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:53:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:53:57,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:53:57,979 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:53:57,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:53:57,995 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:53:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:53:58,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:53:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:53:58,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:53:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:53:59,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:53:59,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:53:59,083 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:53:59,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:53:59,084 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:53:59,084 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:53:59,085 INFO L87 Difference]: Start difference. First operand 36773 states and 48887 transitions. Second operand 9 states. [2018-09-18 11:54:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:54:08,247 INFO L93 Difference]: Finished difference Result 84266 states and 112107 transitions. [2018-09-18 11:54:08,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-18 11:54:08,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 633 [2018-09-18 11:54:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:54:08,462 INFO L225 Difference]: With dead ends: 84266 [2018-09-18 11:54:08,462 INFO L226 Difference]: Without dead ends: 47499 [2018-09-18 11:54:08,649 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2552 GetRequests, 2529 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-09-18 11:54:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47499 states. [2018-09-18 11:54:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47499 to 45163. [2018-09-18 11:54:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45163 states. [2018-09-18 11:54:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45163 states to 45163 states and 53346 transitions. [2018-09-18 11:54:09,518 INFO L78 Accepts]: Start accepts. Automaton has 45163 states and 53346 transitions. Word has length 633 [2018-09-18 11:54:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:54:09,520 INFO L480 AbstractCegarLoop]: Abstraction has 45163 states and 53346 transitions. [2018-09-18 11:54:09,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:54:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45163 states and 53346 transitions. [2018-09-18 11:54:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2018-09-18 11:54:09,591 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:54:09,591 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:54:09,592 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:54:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1427991772, now seen corresponding path program 1 times [2018-09-18 11:54:09,592 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:54:09,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:09,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:09,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:09,594 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:54:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:10,137 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-09-18 11:54:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 192 proven. 303 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-09-18 11:54:10,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:54:10,859 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 [2018-09-18 11:54:10,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:10,867 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:54:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:11,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:54:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-09-18 11:54:11,649 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:54:11,807 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-18 11:54:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 192 proven. 303 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-09-18 11:54:13,239 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:54:13,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:54:13,240 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:54:13,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:54:13,241 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:54:13,241 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:54:13,241 INFO L87 Difference]: Start difference. First operand 45163 states and 53346 transitions. Second operand 5 states. [2018-09-18 11:54:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:54:26,355 INFO L93 Difference]: Finished difference Result 96044 states and 114493 transitions. [2018-09-18 11:54:26,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:54:26,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 670 [2018-09-18 11:54:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:54:26,497 INFO L225 Difference]: With dead ends: 96044 [2018-09-18 11:54:26,497 INFO L226 Difference]: Without dead ends: 50892 [2018-09-18 11:54:26,586 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 1334 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-09-18 11:54:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50892 states. [2018-09-18 11:54:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50892 to 50424. [2018-09-18 11:54:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50424 states. [2018-09-18 11:54:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50424 states to 50424 states and 59458 transitions. [2018-09-18 11:54:27,282 INFO L78 Accepts]: Start accepts. Automaton has 50424 states and 59458 transitions. Word has length 670 [2018-09-18 11:54:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:54:27,283 INFO L480 AbstractCegarLoop]: Abstraction has 50424 states and 59458 transitions. [2018-09-18 11:54:27,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:54:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 50424 states and 59458 transitions. [2018-09-18 11:54:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2018-09-18 11:54:27,326 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:54:27,327 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:54:27,327 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:54:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1891644557, now seen corresponding path program 1 times [2018-09-18 11:54:27,328 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:54:27,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:27,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:27,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:27,329 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:54:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 198 proven. 443 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-09-18 11:54:31,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:54:31,284 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:54:31,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:31,294 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:54:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:31,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:54:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:54:33,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:54:33,560 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2018-09-18 11:54:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2018-09-18 11:54:33,886 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:54:33,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [19] total 23 [2018-09-18 11:54:33,886 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:54:33,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:54:33,887 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:54:33,887 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:54:33,888 INFO L87 Difference]: Start difference. First operand 50424 states and 59458 transitions. Second operand 5 states. [2018-09-18 11:55:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:06,444 INFO L93 Difference]: Finished difference Result 115418 states and 141762 transitions. [2018-09-18 11:55:06,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 11:55:06,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 744 [2018-09-18 11:55:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:06,608 INFO L225 Difference]: With dead ends: 115418 [2018-09-18 11:55:06,608 INFO L226 Difference]: Without dead ends: 65375 [2018-09-18 11:55:06,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1487 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-09-18 11:55:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65375 states. [2018-09-18 11:55:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65375 to 64691. [2018-09-18 11:55:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64691 states. [2018-09-18 11:55:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64691 states to 64691 states and 76212 transitions. [2018-09-18 11:55:07,784 INFO L78 Accepts]: Start accepts. Automaton has 64691 states and 76212 transitions. Word has length 744 [2018-09-18 11:55:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:07,786 INFO L480 AbstractCegarLoop]: Abstraction has 64691 states and 76212 transitions. [2018-09-18 11:55:07,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:55:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 64691 states and 76212 transitions. [2018-09-18 11:55:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2018-09-18 11:55:07,871 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:07,871 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:07,872 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -574696801, now seen corresponding path program 1 times [2018-09-18 11:55:07,872 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:07,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:07,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:07,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:07,874 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:08,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:08,534 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:08,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:08,544 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:08,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:09,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:09,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:09,958 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:55:09,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:09,974 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:10,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:10,886 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:12,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:55:12,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-09-18 11:55:12,303 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:55:12,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 11:55:12,304 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 11:55:12,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-09-18 11:55:12,304 INFO L87 Difference]: Start difference. First operand 64691 states and 76212 transitions. Second operand 7 states. [2018-09-18 11:55:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:24,906 INFO L93 Difference]: Finished difference Result 173347 states and 206615 transitions. [2018-09-18 11:55:24,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 11:55:24,907 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 760 [2018-09-18 11:55:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:25,210 INFO L225 Difference]: With dead ends: 173347 [2018-09-18 11:55:25,210 INFO L226 Difference]: Without dead ends: 108970 [2018-09-18 11:55:25,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3058 GetRequests, 3039 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-09-18 11:55:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108970 states. [2018-09-18 11:55:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108970 to 107888. [2018-09-18 11:55:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107888 states. [2018-09-18 11:55:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107888 states to 107888 states and 123561 transitions. [2018-09-18 11:55:27,171 INFO L78 Accepts]: Start accepts. Automaton has 107888 states and 123561 transitions. Word has length 760 [2018-09-18 11:55:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:27,172 INFO L480 AbstractCegarLoop]: Abstraction has 107888 states and 123561 transitions. [2018-09-18 11:55:27,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 11:55:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 107888 states and 123561 transitions. [2018-09-18 11:55:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-09-18 11:55:27,273 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:27,273 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:27,274 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1108962383, now seen corresponding path program 1 times [2018-09-18 11:55:27,274 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:27,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:27,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:27,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:27,275 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-09-18 11:55:28,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:28,339 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:28,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:28,346 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:28,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:36,528 WARN L178 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-09-18 11:55:37,608 WARN L1001 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_3 Int)) (let ((.cse0 (mod v_prenex_3 299926))) (and (<= (+ v_prenex_3 44) 0) (<= .cse0 (+ c_~a0~0 300073)) (= 0 .cse0)))) (exists ((v_~a0~0_987 Int)) (let ((.cse1 (mod v_~a0~0_987 299926))) (and (<= (+ v_~a0~0_987 44) 0) (<= .cse1 (+ c_~a0~0 599999)) (< v_~a0~0_987 0) (not (= 0 .cse1)))))) is different from true [2018-09-18 11:55:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 388 trivial. 19 not checked. [2018-09-18 11:55:38,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 706 proven. 2 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-18 11:55:39,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:39,604 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:55:39,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:39,619 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:40,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:40,615 WARN L178 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2018-09-18 11:55:41,126 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2018-09-18 11:55:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 673 proven. 193 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2018-09-18 11:55:42,838 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:44,247 WARN L178 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-09-18 11:55:44,251 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-09-18 11:55:51,094 WARN L178 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-09-18 11:55:51,098 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:55:56,051 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:00,275 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:05,533 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:07,884 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:14,126 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:18,324 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:56:22,583 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 Received shutdown request... [2018-09-18 11:56:24,645 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 11:56:24,846 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:56:24,847 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:56:24,852 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:56:24,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:56:24 BoogieIcfgContainer [2018-09-18 11:56:24,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:56:24,853 INFO L168 Benchmark]: Toolchain (without parser) took 241871.48 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.2 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -285.8 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,854 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-09-18 11:56:24,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1384.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,856 INFO L168 Benchmark]: Boogie Procedure Inliner took 294.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,856 INFO L168 Benchmark]: Boogie Preprocessor took 754.93 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 865.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,857 INFO L168 Benchmark]: RCFGBuilder took 6644.38 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 299.7 MB). Peak memory consumption was 299.7 MB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,858 INFO L168 Benchmark]: TraceAbstraction took 232786.61 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 255.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-18 11:56:24,867 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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. * CACSL2BoogieTranslator took 1384.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 116.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 294.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 754.93 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 865.6 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6644.38 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 299.7 MB). Peak memory consumption was 299.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232786.61 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.4 GB). Free memory was 1.9 GB in the beginning and 1.7 GB in the end (delta: 255.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 199]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 199). Cancelled while BasicCegarLoop was analyzing trace of length 814 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 36 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 232.7s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 141.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2509 SDtfs, 16988 SDslu, 3679 SDs, 0 SdLazy, 38514 SolverSat, 7617 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 122.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11488 GetRequests, 11306 SyntacticMatches, 23 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107888occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 5384 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 9889 NumberOfCodeBlocks, 9889 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 15498 ConstructedInterpolants, 68 QuantifiedInterpolants, 42536472 SizeOfPredicates, 11 NumberOfNonLiveVariables, 7920 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 15943/17506 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-56-24-893.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-56-24-893.csv Completed graceful shutdown