java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label13_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:33:05,056 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:33:05,058 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:33:05,070 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:33:05,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:33:05,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:33:05,073 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:33:05,074 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:33:05,076 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:33:05,077 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:33:05,078 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:33:05,078 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:33:05,079 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:33:05,080 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:33:05,081 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:33:05,082 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:33:05,083 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:33:05,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:33:05,087 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:33:05,088 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:33:05,089 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:33:05,090 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:33:05,093 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:33:05,093 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:33:05,094 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:33:05,094 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:33:05,098 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:33:05,099 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:33:05,102 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:33:05,104 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:33:05,104 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:33:05,105 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:33:05,105 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:33:05,107 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:33:05,108 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:33:05,109 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:33:05,109 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 [2018-07-24 14:33:05,125 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:33:05,125 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:33:05,126 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:33:05,126 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:33:05,126 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:33:05,127 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:33:05,127 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:33:05,127 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:33:05,127 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:33:05,127 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:33:05,127 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:33:05,128 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:33:05,129 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:33:05,129 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:33:05,129 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:33:05,129 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:33:05,129 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:33:05,130 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:33:05,130 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:33:05,130 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:33:05,130 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:33:05,130 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:33:05,131 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:33:05,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:33:05,131 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:33:05,131 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:33:05,131 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:33:05,132 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:33:05,132 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:33:05,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:33:05,132 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:33:05,132 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:33:05,133 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:33:05,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:33:05,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:33:05,200 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:33:05,202 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:33:05,202 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:33:05,203 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label13_true-unreach-call.c [2018-07-24 14:33:05,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbc7ba85c/1296189cf812432691e2d3ea09056751/FLAG2248691b0 [2018-07-24 14:33:05,918 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:33:05,919 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label13_true-unreach-call.c [2018-07-24 14:33:05,939 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbc7ba85c/1296189cf812432691e2d3ea09056751/FLAG2248691b0 [2018-07-24 14:33:05,955 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbc7ba85c/1296189cf812432691e2d3ea09056751 [2018-07-24 14:33:05,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:33:05,971 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:33:05,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:33:05,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:33:05,982 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:33:05,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:33:05" (1/1) ... [2018-07-24 14:33:05,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f34b976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:05, skipping insertion in model container [2018-07-24 14:33:05,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:33:05" (1/1) ... [2018-07-24 14:33:06,256 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:33:06,849 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:33:06,866 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:33:07,168 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:33:07,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07 WrapperNode [2018-07-24 14:33:07,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:33:07,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:33:07,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:33:07,304 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:33:07,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:07,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:07,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:33:07,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:33:07,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:33:07,547 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:33:07,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:07,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:07,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:07,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:08,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:08,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:08,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... [2018-07-24 14:33:08,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:33:08,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:33:08,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:33:08,214 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:33:08,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:33:08,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:33:08,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:33:08,287 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:33:08,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-07-24 14:33:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:33:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:33:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:33:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:33:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:33:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-07-24 14:33:17,183 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:33:17,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:33:17 BoogieIcfgContainer [2018-07-24 14:33:17,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:33:17,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:33:17,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:33:17,192 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:33:17,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:33:05" (1/3) ... [2018-07-24 14:33:17,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6a0b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:33:17, skipping insertion in model container [2018-07-24 14:33:17,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:33:07" (2/3) ... [2018-07-24 14:33:17,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6a0b72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:33:17, skipping insertion in model container [2018-07-24 14:33:17,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:33:17" (3/3) ... [2018-07-24 14:33:17,198 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label13_true-unreach-call.c [2018-07-24 14:33:17,211 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:33:17,227 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:33:17,308 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:33:17,309 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:33:17,310 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:33:17,310 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:33:17,310 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:33:17,310 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:33:17,310 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:33:17,311 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:33:17,311 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:33:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 14:33:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-07-24 14:33:17,373 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:17,374 INFO L353 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] [2018-07-24 14:33:17,374 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:17,380 INFO L82 PathProgramCache]: Analyzing trace with hash -258166095, now seen corresponding path program 1 times [2018-07-24 14:33:17,384 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:17,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:17,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:17,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:17,435 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:17,923 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:33:17,924 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:33:17,924 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:33:17,929 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:33:17,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:33:17,946 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:33:17,950 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-07-24 14:33:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:26,403 INFO L93 Difference]: Finished difference Result 1550 states and 2835 transitions. [2018-07-24 14:33:26,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:33:26,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-07-24 14:33:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:26,436 INFO L225 Difference]: With dead ends: 1550 [2018-07-24 14:33:26,436 INFO L226 Difference]: Without dead ends: 1106 [2018-07-24 14:33:26,451 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:33:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2018-07-24 14:33:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 762. [2018-07-24 14:33:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-07-24 14:33:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1263 transitions. [2018-07-24 14:33:26,600 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1263 transitions. Word has length 55 [2018-07-24 14:33:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:26,601 INFO L471 AbstractCegarLoop]: Abstraction has 762 states and 1263 transitions. [2018-07-24 14:33:26,601 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:33:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1263 transitions. [2018-07-24 14:33:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-07-24 14:33:26,609 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:26,610 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:26,610 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1488359484, now seen corresponding path program 1 times [2018-07-24 14:33:26,610 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:26,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:26,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:26,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:26,612 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:26,879 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:33:26,880 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:33:26,880 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:33:26,882 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:33:26,882 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:33:26,882 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:33:26,883 INFO L87 Difference]: Start difference. First operand 762 states and 1263 transitions. Second operand 5 states. [2018-07-24 14:33:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:38,368 INFO L93 Difference]: Finished difference Result 2780 states and 4777 transitions. [2018-07-24 14:33:38,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:33:38,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2018-07-24 14:33:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:38,383 INFO L225 Difference]: With dead ends: 2780 [2018-07-24 14:33:38,384 INFO L226 Difference]: Without dead ends: 2024 [2018-07-24 14:33:38,391 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:33:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2018-07-24 14:33:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1995. [2018-07-24 14:33:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1995 states. [2018-07-24 14:33:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2717 transitions. [2018-07-24 14:33:38,462 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2717 transitions. Word has length 128 [2018-07-24 14:33:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:38,463 INFO L471 AbstractCegarLoop]: Abstraction has 1995 states and 2717 transitions. [2018-07-24 14:33:38,463 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:33:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2717 transitions. [2018-07-24 14:33:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-07-24 14:33:38,467 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:38,467 INFO L353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:38,467 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1430667220, now seen corresponding path program 1 times [2018-07-24 14:33:38,468 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:38,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:38,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:38,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:38,469 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:38,816 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:38,816 INFO L191 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 [2018-07-24 14:33:38,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:38,831 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:38,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:39,982 WARN L169 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:33:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:40,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:40,183 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:33:40,904 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-07-24 14:33:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:41,102 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:33:41,102 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2018-07-24 14:33:41,102 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:33:41,103 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:33:41,103 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:33:41,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:33:41,104 INFO L87 Difference]: Start difference. First operand 1995 states and 2717 transitions. Second operand 5 states. [2018-07-24 14:33:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:52,568 INFO L93 Difference]: Finished difference Result 5536 states and 7623 transitions. [2018-07-24 14:33:52,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:33:52,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2018-07-24 14:33:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:52,588 INFO L225 Difference]: With dead ends: 5536 [2018-07-24 14:33:52,588 INFO L226 Difference]: Without dead ends: 3547 [2018-07-24 14:33:52,596 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:33:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2018-07-24 14:33:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3183. [2018-07-24 14:33:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2018-07-24 14:33:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4401 transitions. [2018-07-24 14:33:52,685 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4401 transitions. Word has length 136 [2018-07-24 14:33:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:52,686 INFO L471 AbstractCegarLoop]: Abstraction has 3183 states and 4401 transitions. [2018-07-24 14:33:52,686 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:33:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4401 transitions. [2018-07-24 14:33:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-07-24 14:33:52,690 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:52,690 INFO L353 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, 2, 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] [2018-07-24 14:33:52,691 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1135460370, now seen corresponding path program 1 times [2018-07-24 14:33:52,691 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:52,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:52,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:52,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:52,692 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 14:33:53,089 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:53,089 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:53,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:53,098 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:53,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 14:33:53,292 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-07-24 14:33:54,131 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:33:54,131 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-07-24 14:33:54,131 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:33:54,132 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:33:54,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:33:54,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:33:54,133 INFO L87 Difference]: Start difference. First operand 3183 states and 4401 transitions. Second operand 5 states. [2018-07-24 14:33:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:58,403 INFO L93 Difference]: Finished difference Result 7005 states and 10046 transitions. [2018-07-24 14:33:58,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:33:58,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2018-07-24 14:33:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:58,426 INFO L225 Difference]: With dead ends: 7005 [2018-07-24 14:33:58,426 INFO L226 Difference]: Without dead ends: 4136 [2018-07-24 14:33:58,436 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 446 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-07-24 14:33:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2018-07-24 14:33:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3554. [2018-07-24 14:33:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3554 states. [2018-07-24 14:33:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 4571 transitions. [2018-07-24 14:33:58,550 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 4571 transitions. Word has length 224 [2018-07-24 14:33:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:58,551 INFO L471 AbstractCegarLoop]: Abstraction has 3554 states and 4571 transitions. [2018-07-24 14:33:58,551 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:33:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 4571 transitions. [2018-07-24 14:33:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-24 14:33:58,556 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:58,556 INFO L353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:33:58,556 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -809941506, now seen corresponding path program 1 times [2018-07-24 14:33:58,557 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:58,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:58,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:58,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:58,561 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 48 proven. 122 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-07-24 14:33:59,379 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:59,379 INFO L191 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 [2018-07-24 14:33:59,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:59,388 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:59,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 151 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:33:59,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:34:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 101 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:34:00,392 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:34:00,392 INFO L191 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 [2018-07-24 14:34:00,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:00,411 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:34:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:00,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:34:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 101 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-07-24 14:34:00,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:34:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 101 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:34:01,371 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:34:01,371 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 9] total 30 [2018-07-24 14:34:01,372 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:34:01,373 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:34:01,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:34:01,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2018-07-24 14:34:01,374 INFO L87 Difference]: Start difference. First operand 3554 states and 4571 transitions. Second operand 20 states. [2018-07-24 14:34:06,197 WARN L169 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2018-07-24 14:34:12,276 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2018-07-24 14:34:14,103 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-07-24 14:34:17,132 WARN L169 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2018-07-24 14:34:27,909 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-07-24 14:34:41,299 WARN L169 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2018-07-24 14:34:41,531 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-07-24 14:34:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:34:47,077 INFO L93 Difference]: Finished difference Result 24252 states and 37843 transitions. [2018-07-24 14:34:47,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-07-24 14:34:47,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 232 [2018-07-24 14:34:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:34:47,300 INFO L225 Difference]: With dead ends: 24252 [2018-07-24 14:34:47,300 INFO L226 Difference]: Without dead ends: 20109 [2018-07-24 14:34:47,441 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 911 SyntacticMatches, 6 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8262 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3612, Invalid=16980, Unknown=0, NotChecked=0, Total=20592 [2018-07-24 14:34:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20109 states. [2018-07-24 14:34:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20109 to 18532. [2018-07-24 14:34:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18532 states. [2018-07-24 14:34:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18532 states to 18532 states and 25966 transitions. [2018-07-24 14:34:48,372 INFO L78 Accepts]: Start accepts. Automaton has 18532 states and 25966 transitions. Word has length 232 [2018-07-24 14:34:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:34:48,373 INFO L471 AbstractCegarLoop]: Abstraction has 18532 states and 25966 transitions. [2018-07-24 14:34:48,373 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:34:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 18532 states and 25966 transitions. [2018-07-24 14:34:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2018-07-24 14:34:48,404 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:34:48,404 INFO L353 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:34:48,405 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:34:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash -187355494, now seen corresponding path program 1 times [2018-07-24 14:34:48,405 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:34:48,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:34:48,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:48,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:34:48,406 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:34:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 232 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 14:34:49,464 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:34:49,464 INFO L191 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 [2018-07-24 14:34:49,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:49,474 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:34:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:49,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:34:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 14:34:49,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:34:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 232 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 14:34:50,201 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:34:50,202 INFO L191 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 [2018-07-24 14:34:50,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:34:50,219 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:34:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:34:50,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:34:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 346 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-07-24 14:34:50,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:34:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 232 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 14:34:51,743 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:34:51,744 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 14:34:51,744 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:34:51,746 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:34:51,746 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:34:51,746 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:34:51,747 INFO L87 Difference]: Start difference. First operand 18532 states and 25966 transitions. Second operand 9 states. [2018-07-24 14:35:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:04,870 INFO L93 Difference]: Finished difference Result 46742 states and 84171 transitions. [2018-07-24 14:35:04,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-07-24 14:35:04,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 501 [2018-07-24 14:35:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:05,172 INFO L225 Difference]: With dead ends: 46742 [2018-07-24 14:35:05,172 INFO L226 Difference]: Without dead ends: 28524 [2018-07-24 14:35:05,502 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2036 GetRequests, 2009 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:35:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28524 states. [2018-07-24 14:35:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28524 to 27767. [2018-07-24 14:35:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27767 states. [2018-07-24 14:35:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27767 states to 27767 states and 45339 transitions. [2018-07-24 14:35:07,526 INFO L78 Accepts]: Start accepts. Automaton has 27767 states and 45339 transitions. Word has length 501 [2018-07-24 14:35:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:07,527 INFO L471 AbstractCegarLoop]: Abstraction has 27767 states and 45339 transitions. [2018-07-24 14:35:07,527 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:35:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 27767 states and 45339 transitions. [2018-07-24 14:35:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2018-07-24 14:35:07,574 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:07,575 INFO L353 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:35:07,575 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 242495904, now seen corresponding path program 1 times [2018-07-24 14:35:07,575 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:07,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:07,576 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:08,045 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:35:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 228 proven. 117 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-07-24 14:35:08,732 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:35:08,733 INFO L191 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 [2018-07-24 14:35:08,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:08,741 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:35:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:08,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:35:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:09,107 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:35:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:09,355 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:35:09,355 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:35:09,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:09,372 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:35:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:09,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:35:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:10,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:35:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:10,564 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:35:10,564 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-07-24 14:35:10,565 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:35:10,566 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 14:35:10,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 14:35:10,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:35:10,567 INFO L87 Difference]: Start difference. First operand 27767 states and 45339 transitions. Second operand 11 states. [2018-07-24 14:35:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:35:22,732 INFO L93 Difference]: Finished difference Result 59470 states and 100246 transitions. [2018-07-24 14:35:22,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 14:35:22,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 526 [2018-07-24 14:35:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:35:22,930 INFO L225 Difference]: With dead ends: 59470 [2018-07-24 14:35:22,930 INFO L226 Difference]: Without dead ends: 32017 [2018-07-24 14:35:23,546 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2143 GetRequests, 2108 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:35:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32017 states. [2018-07-24 14:35:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32017 to 30749. [2018-07-24 14:35:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30749 states. [2018-07-24 14:35:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30749 states to 30749 states and 36737 transitions. [2018-07-24 14:35:24,348 INFO L78 Accepts]: Start accepts. Automaton has 30749 states and 36737 transitions. Word has length 526 [2018-07-24 14:35:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:35:24,349 INFO L471 AbstractCegarLoop]: Abstraction has 30749 states and 36737 transitions. [2018-07-24 14:35:24,349 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 14:35:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30749 states and 36737 transitions. [2018-07-24 14:35:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2018-07-24 14:35:24,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:35:24,433 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:35:24,433 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:35:24,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1873003466, now seen corresponding path program 1 times [2018-07-24 14:35:24,435 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:35:24,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:24,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:24,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:35:24,436 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:35:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:25,341 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:35:25,828 WARN L169 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 14:35:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 404 proven. 51 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:26,383 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:35:26,383 INFO L191 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 [2018-07-24 14:35:26,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:26,392 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:35:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:26,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:35:27,081 WARN L169 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-07-24 14:35:44,896 WARN L169 SmtUtils]: Spent 17.57 s on a formula simplification. DAG size of input: 200 DAG size of output: 46 [2018-07-24 14:35:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 404 proven. 51 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:45,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:35:46,089 WARN L169 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2018-07-24 14:35:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 404 proven. 51 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:47,059 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:35:47,059 INFO L191 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 [2018-07-24 14:35:47,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:35:47,083 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:35:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:35:47,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:35:52,254 WARN L169 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 202 DAG size of output: 77 [2018-07-24 14:35:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 404 proven. 51 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:53,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:35:53,496 WARN L169 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2018-07-24 14:35:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 404 proven. 51 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-07-24 14:35:54,970 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:35:54,971 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7, 10, 9] total 28 [2018-07-24 14:35:54,971 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:35:54,972 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:35:54,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:35:54,972 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:35:54,973 INFO L87 Difference]: Start difference. First operand 30749 states and 36737 transitions. Second operand 13 states. [2018-07-24 14:36:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:17,500 INFO L93 Difference]: Finished difference Result 75220 states and 93183 transitions. [2018-07-24 14:36:17,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-07-24 14:36:17,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 638 [2018-07-24 14:36:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:17,683 INFO L225 Difference]: With dead ends: 75220 [2018-07-24 14:36:17,683 INFO L226 Difference]: Without dead ends: 44785 [2018-07-24 14:36:17,870 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2608 GetRequests, 2555 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2018-07-24 14:36:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44785 states. [2018-07-24 14:36:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44785 to 43836. [2018-07-24 14:36:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43836 states. [2018-07-24 14:36:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43836 states to 43836 states and 52220 transitions. [2018-07-24 14:36:19,292 INFO L78 Accepts]: Start accepts. Automaton has 43836 states and 52220 transitions. Word has length 638 [2018-07-24 14:36:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:19,294 INFO L471 AbstractCegarLoop]: Abstraction has 43836 states and 52220 transitions. [2018-07-24 14:36:19,294 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:36:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 43836 states and 52220 transitions. [2018-07-24 14:36:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-07-24 14:36:19,337 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:19,337 INFO L353 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:36:19,337 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 186904948, now seen corresponding path program 1 times [2018-07-24 14:36:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:19,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:19,339 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-07-24 14:36:19,807 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:19,807 INFO L191 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 [2018-07-24 14:36:19,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:19,815 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:20,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2018-07-24 14:36:20,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2018-07-24 14:36:20,407 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:36:20,408 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-07-24 14:36:20,408 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:36:20,409 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:36:20,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:36:20,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:36:20,409 INFO L87 Difference]: Start difference. First operand 43836 states and 52220 transitions. Second operand 3 states. [2018-07-24 14:36:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:24,403 INFO L93 Difference]: Finished difference Result 87597 states and 104464 transitions. [2018-07-24 14:36:24,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:36:24,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 671 [2018-07-24 14:36:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:24,581 INFO L225 Difference]: With dead ends: 87597 [2018-07-24 14:36:24,581 INFO L226 Difference]: Without dead ends: 44142 [2018-07-24 14:36:24,731 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1344 GetRequests, 1342 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:36:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44142 states. [2018-07-24 14:36:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44142 to 43827. [2018-07-24 14:36:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43827 states. [2018-07-24 14:36:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43827 states to 43827 states and 52171 transitions. [2018-07-24 14:36:25,771 INFO L78 Accepts]: Start accepts. Automaton has 43827 states and 52171 transitions. Word has length 671 [2018-07-24 14:36:25,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:25,773 INFO L471 AbstractCegarLoop]: Abstraction has 43827 states and 52171 transitions. [2018-07-24 14:36:25,773 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:36:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43827 states and 52171 transitions. [2018-07-24 14:36:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-07-24 14:36:25,815 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:25,816 INFO L353 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:36:25,816 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1435913910, now seen corresponding path program 1 times [2018-07-24 14:36:25,817 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:25,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:25,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:25,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:25,818 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2018-07-24 14:36:26,419 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:36:26,419 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:36:26,419 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:36:26,420 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:36:26,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:36:26,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:36:26,420 INFO L87 Difference]: Start difference. First operand 43827 states and 52171 transitions. Second operand 4 states. [2018-07-24 14:36:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:30,593 INFO L93 Difference]: Finished difference Result 82352 states and 96241 transitions. [2018-07-24 14:36:30,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:36:30,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 671 [2018-07-24 14:36:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:30,691 INFO L225 Difference]: With dead ends: 82352 [2018-07-24 14:36:30,691 INFO L226 Difference]: Without dead ends: 38906 [2018-07-24 14:36:30,818 INFO L573 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 [2018-07-24 14:36:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38906 states. [2018-07-24 14:36:31,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38906 to 38094. [2018-07-24 14:36:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38094 states. [2018-07-24 14:36:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38094 states to 38094 states and 42221 transitions. [2018-07-24 14:36:31,313 INFO L78 Accepts]: Start accepts. Automaton has 38094 states and 42221 transitions. Word has length 671 [2018-07-24 14:36:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:31,314 INFO L471 AbstractCegarLoop]: Abstraction has 38094 states and 42221 transitions. [2018-07-24 14:36:31,314 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:36:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 38094 states and 42221 transitions. [2018-07-24 14:36:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-07-24 14:36:31,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:31,366 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:36:31,367 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash -703823208, now seen corresponding path program 1 times [2018-07-24 14:36:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:31,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:31,368 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 582 proven. 46 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2018-07-24 14:36:32,271 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:32,271 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:36:32,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:32,282 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:32,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2018-07-24 14:36:32,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2018-07-24 14:36:33,666 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:36:33,667 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 5 [2018-07-24 14:36:33,667 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:36:33,667 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:36:33,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:36:33,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:36:33,668 INFO L87 Difference]: Start difference. First operand 38094 states and 42221 transitions. Second operand 3 states. [2018-07-24 14:36:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:36:37,005 INFO L93 Difference]: Finished difference Result 94503 states and 106031 transitions. [2018-07-24 14:36:37,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:36:37,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 747 [2018-07-24 14:36:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:36:37,138 INFO L225 Difference]: With dead ends: 94503 [2018-07-24 14:36:37,138 INFO L226 Difference]: Without dead ends: 56723 [2018-07-24 14:36:37,242 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1496 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:36:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56723 states. [2018-07-24 14:36:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56723 to 56101. [2018-07-24 14:36:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56101 states. [2018-07-24 14:36:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56101 states to 56101 states and 61602 transitions. [2018-07-24 14:36:37,914 INFO L78 Accepts]: Start accepts. Automaton has 56101 states and 61602 transitions. Word has length 747 [2018-07-24 14:36:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:36:37,915 INFO L471 AbstractCegarLoop]: Abstraction has 56101 states and 61602 transitions. [2018-07-24 14:36:37,915 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:36:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 56101 states and 61602 transitions. [2018-07-24 14:36:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-07-24 14:36:37,993 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:36:37,994 INFO L353 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, 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, 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, 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] [2018-07-24 14:36:37,994 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:36:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash 691917969, now seen corresponding path program 1 times [2018-07-24 14:36:37,995 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:36:37,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:37,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:37,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:36:37,996 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:36:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:38,587 WARN L169 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:36:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 630 proven. 51 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-07-24 14:36:39,441 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:36:39,441 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:36:39,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:36:39,450 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:36:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:36:39,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:36:40,176 WARN L169 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2018-07-24 14:36:40,793 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 81 [2018-07-24 14:36:41,563 WARN L169 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 109 [2018-07-24 14:36:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 630 proven. 51 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-07-24 14:36:43,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:36:44,683 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2018-07-24 14:36:45,523 WARN L169 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 83 [2018-07-24 14:36:45,552 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 119 [2018-07-24 14:36:46,959 WARN L172 XnfTransformerHelper]: Simplifying conjuction of 5106 disjunctions. This might take some time... [2018-07-24 14:36:46,969 INFO L188 XnfTransformerHelper]: Simplified to conjuction of 6 disjunctions. [2018-07-24 14:36:47,611 WARN L169 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2018-07-24 14:36:47,626 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:47,996 WARN L169 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2018-07-24 14:36:48,001 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-07-24 14:36:48,031 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 122 [2018-07-24 14:36:51,643 WARN L172 XnfTransformerHelper]: Simplifying conjuction of 15386 disjunctions. This might take some time... [2018-07-24 14:36:51,721 INFO L188 XnfTransformerHelper]: Simplified to conjuction of 17 disjunctions. [2018-07-24 14:36:52,533 WARN L169 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 111 [2018-07-24 14:36:52,548 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:52,606 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:52,669 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,031 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,110 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,195 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,276 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,354 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,439 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,525 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,605 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,682 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,761 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,845 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:53,930 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,009 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,085 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,162 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,240 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,315 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,373 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,445 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,518 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,591 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,664 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,735 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,793 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,850 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,923 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:54,995 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,068 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,141 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,205 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,266 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,318 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,370 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,422 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,474 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,526 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,598 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2018-07-24 14:36:55,661 WARN L136 XnfTransformerHelper]: expecting exponential blowup for input size 50 Received shutdown request... [2018-07-24 14:36:55,713 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 14:36:55,915 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:36:55,915 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:36:55,922 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:36:55,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:36:55 BoogieIcfgContainer [2018-07-24 14:36:55,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:36:55,923 INFO L168 Benchmark]: Toolchain (without parser) took 229953.68 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -522.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,925 INFO L168 Benchmark]: CDTParser took 0.27 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. [2018-07-24 14:36:55,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1330.08 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 242.81 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: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,927 INFO L168 Benchmark]: Boogie Preprocessor took 667.09 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 883.9 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,928 INFO L168 Benchmark]: RCFGBuilder took 8971.90 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: 314.3 MB). Peak memory consumption was 314.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,928 INFO L168 Benchmark]: TraceAbstraction took 218734.79 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 56.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-07-24 14:36:55,933 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 1330.08 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 242.81 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: 42.4 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 667.09 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 883.9 MB). Free memory was 1.2 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 105.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8971.90 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: 314.3 MB). Peak memory consumption was 314.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218734.79 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 56.4 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: 151]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 151). Cancelled while BasicCegarLoop was analyzing trace of length 814 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 1 quantifier alternations, while DnfTransformerHelper was transforming 0 conjuction. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 218.6s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 143.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2332 SDtfs, 37682 SDslu, 4179 SDs, 0 SdLazy, 56031 SolverSat, 15724 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11449 GetRequests, 11146 SyntacticMatches, 27 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9295 ImplicationChecksByTransitivity, 39.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56101occurred in iteration=11, 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: 7.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 7619 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 42.1s InterpolantComputationTime, 10101 NumberOfCodeBlocks, 10101 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 15638 ConstructedInterpolants, 53 QuantifiedInterpolants, 28760957 SizeOfPredicates, 39 NumberOfNonLiveVariables, 8145 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 14189/15310 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_label13_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-36-55-954.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label13_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-36-55-954.csv Completed graceful shutdown