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_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:37:53,506 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:37:53,508 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:37:53,520 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:37:53,521 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:37:53,522 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:37:53,523 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:37:53,525 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:37:53,526 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:37:53,527 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:37:53,528 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:37:53,528 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:37:53,529 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:37:53,530 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:37:53,531 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:37:53,532 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:37:53,533 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:37:53,535 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:37:53,537 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:37:53,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:37:53,539 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:37:53,541 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:37:53,543 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:37:53,543 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:37:53,543 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:37:53,545 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:37:53,546 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:37:53,546 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:37:53,547 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:37:53,548 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:37:53,549 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:37:53,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:37:53,550 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:37:53,550 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:37:53,551 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:37:53,552 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:37:53,552 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 14:37:53,566 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:37:53,567 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:37:53,568 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:37:53,568 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:37:53,568 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:37:53,568 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:37:53,568 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:37:53,569 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:37:53,569 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:37:53,569 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:37:53,569 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:37:53,570 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:37:53,570 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:37:53,570 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:37:53,571 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:37:53,571 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:37:53,571 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:37:53,571 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:37:53,571 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:37:53,572 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:37:53,572 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:37:53,572 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:37:53,572 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:37:53,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:37:53,573 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:37:53,573 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:37:53,573 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:37:53,573 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:37:53,574 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:37:53,574 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:37:53,574 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:37:53,574 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:37:53,574 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:37:53,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:37:53,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:37:53,655 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:37:53,657 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:37:53,658 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:37:53,658 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label44_true-unreach-call.c [2018-07-24 14:37:54,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c2fdbae/132f92df8e6246679052397dd6b4a101/FLAGb09986cdb [2018-07-24 14:37:54,400 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:37:54,401 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label44_true-unreach-call.c [2018-07-24 14:37:54,442 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c2fdbae/132f92df8e6246679052397dd6b4a101/FLAGb09986cdb [2018-07-24 14:37:54,467 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c2fdbae/132f92df8e6246679052397dd6b4a101 [2018-07-24 14:37:54,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:37:54,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:37:54,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:37:54,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:37:54,498 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:37:54,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:37:54" (1/1) ... [2018-07-24 14:37:54,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3819ccc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:54, skipping insertion in model container [2018-07-24 14:37:54,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:37:54" (1/1) ... [2018-07-24 14:37:54,765 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:37:55,409 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:37:55,425 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:37:55,742 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:37:55,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55 WrapperNode [2018-07-24 14:37:55,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:37:55,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:37:55,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:37:55,890 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:37:55,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:55,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:37:56,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:37:56,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:37:56,142 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:37:56,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (1/1) ... [2018-07-24 14:37:56,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:37:56,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:37:56,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:37:56,771 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:37:56,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (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 14:37:56,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:37:56,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:37:56,844 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 14:37:56,845 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 14:37:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:37:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:37:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:37:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:37:56,845 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 14:37:56,846 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 14:38:04,478 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:38:04,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:38:04 BoogieIcfgContainer [2018-07-24 14:38:04,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:38:04,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:38:04,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:38:04,484 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:38:04,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:37:54" (1/3) ... [2018-07-24 14:38:04,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dce4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:38:04, skipping insertion in model container [2018-07-24 14:38:04,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:37:55" (2/3) ... [2018-07-24 14:38:04,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dce4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:38:04, skipping insertion in model container [2018-07-24 14:38:04,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:38:04" (3/3) ... [2018-07-24 14:38:04,488 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label44_true-unreach-call.c [2018-07-24 14:38:04,498 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:38:04,508 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:38:04,564 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:38:04,565 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:38:04,565 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:38:04,565 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:38:04,565 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:38:04,565 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:38:04,566 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:38:04,566 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:38:04,566 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:38:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-07-24 14:38:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-07-24 14:38:04,612 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:04,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:38:04,613 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 14:38:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash -5576359, now seen corresponding path program 1 times [2018-07-24 14:38:04,622 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:04,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:04,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:04,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:04,673 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:05,206 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:38:05,401 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 14:38:05,403 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:05,404 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:38:05,404 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:05,410 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:38:05,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:38:05,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:38:05,429 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 3 states. [2018-07-24 14:38:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:09,448 INFO L93 Difference]: Finished difference Result 1198 states and 2158 transitions. [2018-07-24 14:38:09,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:38:09,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2018-07-24 14:38:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:09,476 INFO L225 Difference]: With dead ends: 1198 [2018-07-24 14:38:09,476 INFO L226 Difference]: Without dead ends: 758 [2018-07-24 14:38:09,487 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:38:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2018-07-24 14:38:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 754. [2018-07-24 14:38:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2018-07-24 14:38:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1328 transitions. [2018-07-24 14:38:09,615 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1328 transitions. Word has length 73 [2018-07-24 14:38:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:09,616 INFO L471 AbstractCegarLoop]: Abstraction has 754 states and 1328 transitions. [2018-07-24 14:38:09,616 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:38:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1328 transitions. [2018-07-24 14:38:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-07-24 14:38:09,630 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:09,630 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, 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] [2018-07-24 14:38:09,631 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 14:38:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1565987012, now seen corresponding path program 1 times [2018-07-24 14:38:09,631 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:09,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:09,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:09,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:09,633 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:38:10,079 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:10,079 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:38:10,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:10,081 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:38:10,082 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:38:10,082 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:38:10,082 INFO L87 Difference]: Start difference. First operand 754 states and 1328 transitions. Second operand 6 states. [2018-07-24 14:38:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:20,481 INFO L93 Difference]: Finished difference Result 2140 states and 3804 transitions. [2018-07-24 14:38:20,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:38:20,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-07-24 14:38:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:20,506 INFO L225 Difference]: With dead ends: 2140 [2018-07-24 14:38:20,507 INFO L226 Difference]: Without dead ends: 1392 [2018-07-24 14:38:20,513 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:38:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2018-07-24 14:38:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1379. [2018-07-24 14:38:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1379 states. [2018-07-24 14:38:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 2168 transitions. [2018-07-24 14:38:20,590 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 2168 transitions. Word has length 147 [2018-07-24 14:38:20,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:20,590 INFO L471 AbstractCegarLoop]: Abstraction has 1379 states and 2168 transitions. [2018-07-24 14:38:20,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:38:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 2168 transitions. [2018-07-24 14:38:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-07-24 14:38:20,601 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:20,601 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, 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] [2018-07-24 14:38:20,602 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 14:38:20,602 INFO L82 PathProgramCache]: Analyzing trace with hash 225088820, now seen corresponding path program 1 times [2018-07-24 14:38:20,602 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:20,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:20,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:20,604 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:20,945 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:38:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:38:21,133 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:21,133 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:38:21,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:21,134 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:38:21,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:38:21,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:38:21,134 INFO L87 Difference]: Start difference. First operand 1379 states and 2168 transitions. Second operand 6 states. [2018-07-24 14:38:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:28,705 INFO L93 Difference]: Finished difference Result 3398 states and 5434 transitions. [2018-07-24 14:38:28,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:38:28,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2018-07-24 14:38:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:28,721 INFO L225 Difference]: With dead ends: 3398 [2018-07-24 14:38:28,721 INFO L226 Difference]: Without dead ends: 2025 [2018-07-24 14:38:28,729 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:38:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2018-07-24 14:38:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2003. [2018-07-24 14:38:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2003 states. [2018-07-24 14:38:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 2887 transitions. [2018-07-24 14:38:28,796 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 2887 transitions. Word has length 159 [2018-07-24 14:38:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:28,799 INFO L471 AbstractCegarLoop]: Abstraction has 2003 states and 2887 transitions. [2018-07-24 14:38:28,799 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:38:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 2887 transitions. [2018-07-24 14:38:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-07-24 14:38:28,804 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:28,804 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, 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] [2018-07-24 14:38:28,804 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 14:38:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1107139168, now seen corresponding path program 1 times [2018-07-24 14:38:28,805 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:28,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:28,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:28,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:28,806 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:38:29,049 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:29,050 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:38:29,050 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:29,052 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:38:29,052 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:38:29,052 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:38:29,053 INFO L87 Difference]: Start difference. First operand 2003 states and 2887 transitions. Second operand 6 states. [2018-07-24 14:38:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:36,839 INFO L93 Difference]: Finished difference Result 6515 states and 9655 transitions. [2018-07-24 14:38:36,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:38:36,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2018-07-24 14:38:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:36,864 INFO L225 Difference]: With dead ends: 6515 [2018-07-24 14:38:36,865 INFO L226 Difference]: Without dead ends: 4518 [2018-07-24 14:38:36,879 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 14:38:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2018-07-24 14:38:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4437. [2018-07-24 14:38:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4437 states. [2018-07-24 14:38:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4437 states to 4437 states and 5657 transitions. [2018-07-24 14:38:37,007 INFO L78 Accepts]: Start accepts. Automaton has 4437 states and 5657 transitions. Word has length 165 [2018-07-24 14:38:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:37,007 INFO L471 AbstractCegarLoop]: Abstraction has 4437 states and 5657 transitions. [2018-07-24 14:38:37,007 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:38:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4437 states and 5657 transitions. [2018-07-24 14:38:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-07-24 14:38:37,013 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:37,014 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, 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] [2018-07-24 14:38:37,014 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 14:38:37,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1530357453, now seen corresponding path program 1 times [2018-07-24 14:38:37,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:37,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:37,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:37,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:37,016 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:37,278 WARN L169 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:38:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:38:37,515 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:37,515 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:38:37,515 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:37,515 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:38:37,516 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:38:37,516 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:38:37,516 INFO L87 Difference]: Start difference. First operand 4437 states and 5657 transitions. Second operand 6 states. [2018-07-24 14:38:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:42,525 INFO L93 Difference]: Finished difference Result 10165 states and 13185 transitions. [2018-07-24 14:38:42,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:38:42,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2018-07-24 14:38:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:42,559 INFO L225 Difference]: With dead ends: 10165 [2018-07-24 14:38:42,559 INFO L226 Difference]: Without dead ends: 5734 [2018-07-24 14:38:42,578 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:38:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2018-07-24 14:38:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 5682. [2018-07-24 14:38:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5682 states. [2018-07-24 14:38:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5682 states to 5682 states and 6921 transitions. [2018-07-24 14:38:42,707 INFO L78 Accepts]: Start accepts. Automaton has 5682 states and 6921 transitions. Word has length 200 [2018-07-24 14:38:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:42,708 INFO L471 AbstractCegarLoop]: Abstraction has 5682 states and 6921 transitions. [2018-07-24 14:38:42,708 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:38:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5682 states and 6921 transitions. [2018-07-24 14:38:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-24 14:38:42,717 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:42,717 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:38:42,717 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 14:38:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 706968325, now seen corresponding path program 1 times [2018-07-24 14:38:42,718 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:42,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:42,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:42,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:42,719 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:42,969 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-07-24 14:38:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 14:38:43,000 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:38:43,000 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:38:43,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:43,001 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:38:43,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:38:43,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:38:43,002 INFO L87 Difference]: Start difference. First operand 5682 states and 6921 transitions. Second operand 3 states. [2018-07-24 14:38:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:47,079 INFO L93 Difference]: Finished difference Result 16081 states and 20040 transitions. [2018-07-24 14:38:47,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:38:47,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2018-07-24 14:38:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:47,123 INFO L225 Difference]: With dead ends: 16081 [2018-07-24 14:38:47,124 INFO L226 Difference]: Without dead ends: 10405 [2018-07-24 14:38:47,149 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:38:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2018-07-24 14:38:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 10378. [2018-07-24 14:38:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10378 states. [2018-07-24 14:38:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10378 states to 10378 states and 12772 transitions. [2018-07-24 14:38:47,375 INFO L78 Accepts]: Start accepts. Automaton has 10378 states and 12772 transitions. Word has length 241 [2018-07-24 14:38:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:47,375 INFO L471 AbstractCegarLoop]: Abstraction has 10378 states and 12772 transitions. [2018-07-24 14:38:47,376 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:38:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 10378 states and 12772 transitions. [2018-07-24 14:38:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-07-24 14:38:47,393 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:47,393 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:38:47,393 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 14:38:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 74654273, now seen corresponding path program 1 times [2018-07-24 14:38:47,394 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:47,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:47,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:47,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:47,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-07-24 14:38:48,025 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:38:48,026 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 14:38:48,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:48,035 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:38:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:38:48,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:38:49,297 WARN L169 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:38:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:38:49,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:38:49,692 WARN L169 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 14:38:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 132 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:38:50,798 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:38:50,799 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-07-24 14:38:50,799 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:38:50,800 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:38:50,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:38:50,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:38:50,800 INFO L87 Difference]: Start difference. First operand 10378 states and 12772 transitions. Second operand 5 states. [2018-07-24 14:38:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:38:59,011 INFO L93 Difference]: Finished difference Result 22176 states and 27257 transitions. [2018-07-24 14:38:59,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:38:59,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2018-07-24 14:38:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:38:59,071 INFO L225 Difference]: With dead ends: 22176 [2018-07-24 14:38:59,071 INFO L226 Difference]: Without dead ends: 11804 [2018-07-24 14:38:59,117 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:38:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11804 states. [2018-07-24 14:38:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11804 to 11512. [2018-07-24 14:38:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11512 states. [2018-07-24 14:38:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 14027 transitions. [2018-07-24 14:38:59,395 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 14027 transitions. Word has length 254 [2018-07-24 14:38:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:38:59,395 INFO L471 AbstractCegarLoop]: Abstraction has 11512 states and 14027 transitions. [2018-07-24 14:38:59,395 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:38:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 14027 transitions. [2018-07-24 14:38:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-07-24 14:38:59,414 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:38:59,414 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:59,415 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 14:38:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash -191871861, now seen corresponding path program 1 times [2018-07-24 14:38:59,415 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:38:59,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:59,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:38:59,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:38:59,416 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:38:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 87 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-07-24 14:39:00,167 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:39:00,167 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 14:39:00,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:00,185 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:39:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:00,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:39:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:39:00,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:39:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-07-24 14:39:01,218 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:39:01,219 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-07-24 14:39:01,219 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:39:01,219 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:39:01,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:39:01,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:39:01,220 INFO L87 Difference]: Start difference. First operand 11512 states and 14027 transitions. Second operand 5 states. [2018-07-24 14:39:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:39:07,333 INFO L93 Difference]: Finished difference Result 33883 states and 42354 transitions. [2018-07-24 14:39:07,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 14:39:07,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 293 [2018-07-24 14:39:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:39:07,416 INFO L225 Difference]: With dead ends: 33883 [2018-07-24 14:39:07,417 INFO L226 Difference]: Without dead ends: 22685 [2018-07-24 14:39:07,443 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 583 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-07-24 14:39:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22685 states. [2018-07-24 14:39:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22685 to 22204. [2018-07-24 14:39:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22204 states. [2018-07-24 14:39:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22204 states to 22204 states and 26029 transitions. [2018-07-24 14:39:07,856 INFO L78 Accepts]: Start accepts. Automaton has 22204 states and 26029 transitions. Word has length 293 [2018-07-24 14:39:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:39:07,858 INFO L471 AbstractCegarLoop]: Abstraction has 22204 states and 26029 transitions. [2018-07-24 14:39:07,858 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:39:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22204 states and 26029 transitions. [2018-07-24 14:39:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-07-24 14:39:07,882 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:39:07,882 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:39:07,883 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 14:39:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1050769931, now seen corresponding path program 1 times [2018-07-24 14:39:07,883 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:39:07,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:07,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:07,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:07,884 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:39:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:08,913 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 14:39:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 282 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:09,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:39:09,088 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 14:39:09,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:09,097 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:39:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:09,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:39:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 363 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:39:09,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:39:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 208 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:10,138 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:39:10,138 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 14:39:10,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:10,299 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:39:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:10,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:39:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 313 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-07-24 14:39:10,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:39:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 208 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:11,488 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:39:11,488 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 14:39:11,489 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:39:11,489 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:39:11,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:39:11,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:39:11,491 INFO L87 Difference]: Start difference. First operand 22204 states and 26029 transitions. Second operand 14 states. [2018-07-24 14:39:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:39:49,970 INFO L93 Difference]: Finished difference Result 60693 states and 73695 transitions. [2018-07-24 14:39:49,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-24 14:39:49,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 350 [2018-07-24 14:39:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:39:50,103 INFO L225 Difference]: With dead ends: 60693 [2018-07-24 14:39:50,104 INFO L226 Difference]: Without dead ends: 37914 [2018-07-24 14:39:50,173 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1458 GetRequests, 1410 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=527, Invalid=1729, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 14:39:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37914 states. [2018-07-24 14:39:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37914 to 35415. [2018-07-24 14:39:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35415 states. [2018-07-24 14:39:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35415 states to 35415 states and 41801 transitions. [2018-07-24 14:39:50,965 INFO L78 Accepts]: Start accepts. Automaton has 35415 states and 41801 transitions. Word has length 350 [2018-07-24 14:39:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:39:50,966 INFO L471 AbstractCegarLoop]: Abstraction has 35415 states and 41801 transitions. [2018-07-24 14:39:50,966 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:39:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35415 states and 41801 transitions. [2018-07-24 14:39:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-07-24 14:39:51,009 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:39:51,009 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:51,009 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 14:39:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash -550577026, now seen corresponding path program 1 times [2018-07-24 14:39:51,010 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:39:51,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:51,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:51,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:39:51,011 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:39:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 282 proven. 173 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:51,677 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:39:51,677 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 14:39:51,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:51,688 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:39:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:51,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:39:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 367 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:39:52,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:39:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 208 proven. 247 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:52,903 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:39:52,903 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 14:39:52,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:39:52,920 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:39:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:39:53,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:39:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 317 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-07-24 14:39:53,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:39:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 208 proven. 247 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:39:54,554 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:39:54,555 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 8, 9] total 24 [2018-07-24 14:39:54,555 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:39:54,556 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:39:54,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:39:54,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2018-07-24 14:39:54,556 INFO L87 Difference]: Start difference. First operand 35415 states and 41801 transitions. Second operand 14 states. [2018-07-24 14:39:54,965 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 14:40:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:26,536 INFO L93 Difference]: Finished difference Result 74972 states and 89245 transitions. [2018-07-24 14:40:26,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-07-24 14:40:26,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 435 [2018-07-24 14:40:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:26,642 INFO L225 Difference]: With dead ends: 74972 [2018-07-24 14:40:26,642 INFO L226 Difference]: Without dead ends: 38670 [2018-07-24 14:40:26,718 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1798 GetRequests, 1747 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=524, Invalid=1732, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 14:40:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38670 states. [2018-07-24 14:40:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38670 to 35690. [2018-07-24 14:40:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35690 states. [2018-07-24 14:40:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35690 states to 35690 states and 41792 transitions. [2018-07-24 14:40:27,275 INFO L78 Accepts]: Start accepts. Automaton has 35690 states and 41792 transitions. Word has length 435 [2018-07-24 14:40:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:27,275 INFO L471 AbstractCegarLoop]: Abstraction has 35690 states and 41792 transitions. [2018-07-24 14:40:27,275 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:40:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 35690 states and 41792 transitions. [2018-07-24 14:40:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-07-24 14:40:27,320 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:27,321 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:27,321 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 14:40:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1337819870, now seen corresponding path program 1 times [2018-07-24 14:40:27,321 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:27,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:27,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:27,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:27,323 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 209 proven. 169 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 14:40:28,607 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:28,607 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 14:40:28,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:28,618 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:28,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 391 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-07-24 14:40:29,110 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 282 proven. 80 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 14:40:29,471 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:29,472 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 14:40:29,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:29,494 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:29,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-07-24 14:40:30,233 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 206 proven. 171 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-07-24 14:40:31,068 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:40:31,069 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-07-24 14:40:31,069 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:40:31,070 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 14:40:31,070 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 14:40:31,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:40:31,071 INFO L87 Difference]: Start difference. First operand 35690 states and 41792 transitions. Second operand 11 states. [2018-07-24 14:40:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:40:53,790 INFO L93 Difference]: Finished difference Result 111907 states and 141384 transitions. [2018-07-24 14:40:53,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-07-24 14:40:53,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 492 [2018-07-24 14:40:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:40:54,028 INFO L225 Difference]: With dead ends: 111907 [2018-07-24 14:40:54,029 INFO L226 Difference]: Without dead ends: 76476 [2018-07-24 14:40:54,133 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2044 GetRequests, 1980 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=727, Invalid=3179, Unknown=0, NotChecked=0, Total=3906 [2018-07-24 14:40:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76476 states. [2018-07-24 14:40:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76476 to 72560. [2018-07-24 14:40:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72560 states. [2018-07-24 14:40:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72560 states to 72560 states and 85176 transitions. [2018-07-24 14:40:55,356 INFO L78 Accepts]: Start accepts. Automaton has 72560 states and 85176 transitions. Word has length 492 [2018-07-24 14:40:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:40:55,356 INFO L471 AbstractCegarLoop]: Abstraction has 72560 states and 85176 transitions. [2018-07-24 14:40:55,356 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 14:40:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72560 states and 85176 transitions. [2018-07-24 14:40:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-07-24 14:40:55,390 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:40:55,391 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:40:55,391 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 14:40:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1087423601, now seen corresponding path program 1 times [2018-07-24 14:40:55,392 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:40:55,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:55,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:55,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:40:55,393 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:40:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 279 proven. 86 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 14:40:56,227 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:56,227 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 14:40:56,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:56,550 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:56,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 14:40:57,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 14:40:57,779 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:40:57,779 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 14:40:57,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:40:57,795 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:40:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:40:58,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:40:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 14:40:58,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:40:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 431 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-07-24 14:40:58,678 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:40:58,679 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-07-24 14:40:58,679 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:40:58,680 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 14:40:58,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 14:40:58,680 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:40:58,681 INFO L87 Difference]: Start difference. First operand 72560 states and 85176 transitions. Second operand 11 states. [2018-07-24 14:41:10,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:10,318 INFO L93 Difference]: Finished difference Result 148944 states and 177563 transitions. [2018-07-24 14:41:10,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-07-24 14:41:10,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 580 [2018-07-24 14:41:10,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:10,559 INFO L225 Difference]: With dead ends: 148944 [2018-07-24 14:41:10,559 INFO L226 Difference]: Without dead ends: 76698 [2018-07-24 14:41:10,777 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2359 GetRequests, 2324 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2018-07-24 14:41:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76698 states. [2018-07-24 14:41:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76698 to 75936. [2018-07-24 14:41:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75936 states. [2018-07-24 14:41:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75936 states to 75936 states and 84744 transitions. [2018-07-24 14:41:11,884 INFO L78 Accepts]: Start accepts. Automaton has 75936 states and 84744 transitions. Word has length 580 [2018-07-24 14:41:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:11,885 INFO L471 AbstractCegarLoop]: Abstraction has 75936 states and 84744 transitions. [2018-07-24 14:41:11,885 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 14:41:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 75936 states and 84744 transitions. [2018-07-24 14:41:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2018-07-24 14:41:11,904 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:11,905 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:41:11,905 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -515768836, now seen corresponding path program 1 times [2018-07-24 14:41:11,905 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:11,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:11,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:11,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:11,907 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2018-07-24 14:41:12,858 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:41:12,858 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 14:41:12,859 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:12,860 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 14:41:12,860 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 14:41:12,860 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 14:41:12,860 INFO L87 Difference]: Start difference. First operand 75936 states and 84744 transitions. Second operand 4 states. [2018-07-24 14:41:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:18,235 INFO L93 Difference]: Finished difference Result 219158 states and 251444 transitions. [2018-07-24 14:41:18,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 14:41:18,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 581 [2018-07-24 14:41:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:18,534 INFO L225 Difference]: With dead ends: 219158 [2018-07-24 14:41:18,534 INFO L226 Difference]: Without dead ends: 100668 [2018-07-24 14:41:18,769 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 14:41:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100668 states. [2018-07-24 14:41:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100668 to 97683. [2018-07-24 14:41:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97683 states. [2018-07-24 14:41:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97683 states to 97683 states and 106101 transitions. [2018-07-24 14:41:20,254 INFO L78 Accepts]: Start accepts. Automaton has 97683 states and 106101 transitions. Word has length 581 [2018-07-24 14:41:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:20,254 INFO L471 AbstractCegarLoop]: Abstraction has 97683 states and 106101 transitions. [2018-07-24 14:41:20,255 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 14:41:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 97683 states and 106101 transitions. [2018-07-24 14:41:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-07-24 14:41:20,261 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:20,262 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 14:41:20,262 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1853929199, now seen corresponding path program 1 times [2018-07-24 14:41:20,262 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:20,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:20,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:20,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:20,264 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2018-07-24 14:41:21,323 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:41:21,323 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:41:21,323 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:21,324 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:41:21,324 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:41:21,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:41:21,325 INFO L87 Difference]: Start difference. First operand 97683 states and 106101 transitions. Second operand 3 states. [2018-07-24 14:41:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:41:24,523 INFO L93 Difference]: Finished difference Result 187495 states and 204787 transitions. [2018-07-24 14:41:24,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:41:24,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 586 [2018-07-24 14:41:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:41:24,733 INFO L225 Difference]: With dead ends: 187495 [2018-07-24 14:41:24,733 INFO L226 Difference]: Without dead ends: 91815 [2018-07-24 14:41:24,888 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:41:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2018-07-24 14:41:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 89778. [2018-07-24 14:41:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89778 states. [2018-07-24 14:41:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89778 states to 89778 states and 97013 transitions. [2018-07-24 14:41:26,203 INFO L78 Accepts]: Start accepts. Automaton has 89778 states and 97013 transitions. Word has length 586 [2018-07-24 14:41:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:41:26,204 INFO L471 AbstractCegarLoop]: Abstraction has 89778 states and 97013 transitions. [2018-07-24 14:41:26,204 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:41:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 89778 states and 97013 transitions. [2018-07-24 14:41:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2018-07-24 14:41:26,230 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:41:26,231 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:41:26,233 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:41:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2058059437, now seen corresponding path program 1 times [2018-07-24 14:41:26,233 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:41:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:26,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:41:26,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:41:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 643 proven. 2 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2018-07-24 14:41:27,657 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:41:27,657 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 14:41:27,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:41:27,664 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:41:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:41:27,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:41:52,384 WARN L169 SmtUtils]: Spent 24.29 s on a formula simplification. DAG size of input: 415 DAG size of output: 25 [2018-07-24 14:41:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2018-07-24 14:41:52,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:41:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2018-07-24 14:41:53,302 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:41:53,303 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-07-24 14:41:53,303 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:41:53,304 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:41:53,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:41:53,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:41:53,304 INFO L87 Difference]: Start difference. First operand 89778 states and 97013 transitions. Second operand 3 states. Received shutdown request... [2018-07-24 14:41:57,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:41:57,287 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:41:57,296 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:41:57,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:41:57 BoogieIcfgContainer [2018-07-24 14:41:57,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:41:57,297 INFO L168 Benchmark]: Toolchain (without parser) took 242816.21 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 69.6 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-07-24 14:41:57,298 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:41:57,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1402.70 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 14:41:57,299 INFO L168 Benchmark]: Boogie Procedure Inliner took 251.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:41:57,300 INFO L168 Benchmark]: Boogie Preprocessor took 629.73 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 897.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:41:57,301 INFO L168 Benchmark]: RCFGBuilder took 7708.45 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: 339.3 MB). Peak memory consumption was 339.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:41:57,301 INFO L168 Benchmark]: TraceAbstraction took 232815.67 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 619.9 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-07-24 14:41:57,311 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1402.70 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 251.66 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 629.73 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 897.1 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7708.45 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: 339.3 MB). Peak memory consumption was 339.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232815.67 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.6 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 619.9 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 205]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 205). Cancelled while BasicCegarLoop was constructing difference of abstraction (89778states) and interpolant automaton (currently 3 states, 3 states before enhancement), while ReachableStatesComputation was computing reachable states (949 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 232.7s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 173.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3638 SDtfs, 33632 SDslu, 4619 SDs, 0 SdLazy, 57964 SolverSat, 11228 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 147.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10284 GetRequests, 10017 SyntacticMatches, 28 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 36.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97683occurred in iteration=13, 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: 7.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 16151 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 43.1s InterpolantComputationTime, 10267 NumberOfCodeBlocks, 10267 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 15216 ConstructedInterpolants, 71 QuantifiedInterpolants, 29545399 SizeOfPredicates, 35 NumberOfNonLiveVariables, 7391 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 37 InterpolantComputations, 13 PerfectInterpolantSequences, 12799/14910 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_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-41-57-326.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label44_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-41-57-326.csv Completed graceful shutdown