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/Problem16_label30_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:18:21,306 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:18:21,308 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:18:21,322 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:18:21,322 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:18:21,323 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:18:21,325 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:18:21,327 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:18:21,328 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:18:21,329 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:18:21,330 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:18:21,330 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:18:21,331 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:18:21,332 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:18:21,333 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:18:21,334 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:18:21,335 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:18:21,337 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:18:21,342 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:18:21,344 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:18:21,347 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:18:21,349 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:18:21,351 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:18:21,351 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:18:21,352 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:18:21,353 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:18:21,354 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:18:21,354 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:18:21,355 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:18:21,356 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:18:21,356 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:18:21,357 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:18:21,357 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:18:21,357 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:18:21,358 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:18:21,359 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:18:21,359 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 12:18:21,388 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:18:21,388 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:18:21,389 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:18:21,389 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:18:21,390 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:18:21,390 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:18:21,390 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:18:21,390 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:18:21,390 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:18:21,391 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:18:21,391 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:18:21,392 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:18:21,392 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:18:21,392 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:18:21,392 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:18:21,392 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:18:21,392 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:18:21,393 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:18:21,393 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:18:21,393 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:18:21,394 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:18:21,394 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:18:21,394 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:18:21,394 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:18:21,395 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:18:21,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:18:21,395 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:18:21,395 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:18:21,395 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:18:21,396 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:18:21,396 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:18:21,396 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:18:21,396 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:18:21,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:18:21,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:18:21,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:18:21,470 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:18:21,471 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:18:21,472 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label30_false-unreach-call.c [2018-07-24 12:18:21,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e96bdcb0/d0d103b298f74d15be3b1c83b5775f84/FLAG4b6673fa8 [2018-07-24 12:18:22,244 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:18:22,245 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label30_false-unreach-call.c [2018-07-24 12:18:22,275 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e96bdcb0/d0d103b298f74d15be3b1c83b5775f84/FLAG4b6673fa8 [2018-07-24 12:18:22,298 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e96bdcb0/d0d103b298f74d15be3b1c83b5775f84 [2018-07-24 12:18:22,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:18:22,314 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:18:22,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:18:22,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:18:22,325 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:18:22,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:18:22" (1/1) ... [2018-07-24 12:18:22,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec00d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:22, skipping insertion in model container [2018-07-24 12:18:22,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:18:22" (1/1) ... [2018-07-24 12:18:22,558 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:18:23,106 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:18:23,123 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:18:23,482 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:18:23,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23 WrapperNode [2018-07-24 12:18:23,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:18:23,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:18:23,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:18:23,618 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:18:23,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:23,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:23,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:18:23,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:18:23,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:18:23,852 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:18:24,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (1/1) ... [2018-07-24 12:18:24,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:18:24,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:18:24,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:18:24,303 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:18:24,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (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 12:18:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:18:24,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:18:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:18:24,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:18:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:18:24,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:18:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:18:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:18:24,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:18:30,589 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:18:30,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:18:30 BoogieIcfgContainer [2018-07-24 12:18:30,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:18:30,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:18:30,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:18:30,595 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:18:30,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:18:22" (1/3) ... [2018-07-24 12:18:30,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ffc595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:18:30, skipping insertion in model container [2018-07-24 12:18:30,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:23" (2/3) ... [2018-07-24 12:18:30,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ffc595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:18:30, skipping insertion in model container [2018-07-24 12:18:30,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:18:30" (3/3) ... [2018-07-24 12:18:30,599 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label30_false-unreach-call.c [2018-07-24 12:18:30,610 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:18:30,619 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:18:30,672 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:18:30,673 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:18:30,674 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:18:30,674 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:18:30,674 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:18:30,674 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:18:30,674 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:18:30,674 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:18:30,675 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:18:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:18:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-07-24 12:18:30,713 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:30,719 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] [2018-07-24 12:18:30,720 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 779896164, now seen corresponding path program 1 times [2018-07-24 12:18:30,728 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:30,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:30,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:30,776 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:31,111 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:18:31,197 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 12:18:31,200 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:18:31,200 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:18:31,201 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:31,207 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:18:31,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:18:31,224 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:18:31,226 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:18:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:34,896 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 12:18:34,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:18:34,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-07-24 12:18:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:34,931 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 12:18:34,932 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 12:18:34,941 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:18:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 12:18:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 12:18:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:18:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-07-24 12:18:35,041 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 22 [2018-07-24 12:18:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:35,042 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-07-24 12:18:35,042 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:18:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-07-24 12:18:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-07-24 12:18:35,050 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:35,051 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:18:35,051 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:35,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2039080678, now seen corresponding path program 1 times [2018-07-24 12:18:35,052 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:35,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:35,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:35,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:35,053 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:18:35,487 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:18:35,488 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:18:35,488 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:35,490 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:18:35,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:18:35,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:18:35,491 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-07-24 12:18:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:44,198 INFO L93 Difference]: Finished difference Result 2183 states and 3908 transitions. [2018-07-24 12:18:44,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:18:44,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2018-07-24 12:18:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:44,216 INFO L225 Difference]: With dead ends: 2183 [2018-07-24 12:18:44,217 INFO L226 Difference]: Without dead ends: 1445 [2018-07-24 12:18:44,224 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 12:18:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2018-07-24 12:18:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1424. [2018-07-24 12:18:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2018-07-24 12:18:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2239 transitions. [2018-07-24 12:18:44,308 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2239 transitions. Word has length 130 [2018-07-24 12:18:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:44,308 INFO L471 AbstractCegarLoop]: Abstraction has 1424 states and 2239 transitions. [2018-07-24 12:18:44,309 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:18:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2239 transitions. [2018-07-24 12:18:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-24 12:18:44,318 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:44,318 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:18:44,318 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash -279594541, now seen corresponding path program 1 times [2018-07-24 12:18:44,319 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:44,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:44,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:44,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:44,320 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:18:44,580 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:18:44,580 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:18:44,580 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:44,580 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:18:44,581 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:18:44,581 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:18:44,581 INFO L87 Difference]: Start difference. First operand 1424 states and 2239 transitions. Second operand 6 states. [2018-07-24 12:18:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:49,847 INFO L93 Difference]: Finished difference Result 3553 states and 5669 transitions. [2018-07-24 12:18:49,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:18:49,855 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-07-24 12:18:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:49,869 INFO L225 Difference]: With dead ends: 3553 [2018-07-24 12:18:49,870 INFO L226 Difference]: Without dead ends: 2135 [2018-07-24 12:18:49,877 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 12:18:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2018-07-24 12:18:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2111. [2018-07-24 12:18:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2111 states. [2018-07-24 12:18:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 2997 transitions. [2018-07-24 12:18:49,946 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 2997 transitions. Word has length 133 [2018-07-24 12:18:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:49,946 INFO L471 AbstractCegarLoop]: Abstraction has 2111 states and 2997 transitions. [2018-07-24 12:18:49,946 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:18:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 2997 transitions. [2018-07-24 12:18:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-07-24 12:18:49,960 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:49,961 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:18:49,961 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1673752017, now seen corresponding path program 1 times [2018-07-24 12:18:49,961 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:49,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:49,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:49,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:49,964 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:18:50,514 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:50,514 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 12:18:50,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:50,535 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:50,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 12:18:51,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:18:51,905 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:18:51,905 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:18:51,906 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:51,906 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:18:51,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:18:51,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:18:51,907 INFO L87 Difference]: Start difference. First operand 2111 states and 2997 transitions. Second operand 5 states. [2018-07-24 12:18:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:59,258 INFO L93 Difference]: Finished difference Result 8227 states and 11748 transitions. [2018-07-24 12:18:59,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:18:59,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2018-07-24 12:18:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:59,291 INFO L225 Difference]: With dead ends: 8227 [2018-07-24 12:18:59,292 INFO L226 Difference]: Without dead ends: 6122 [2018-07-24 12:18:59,304 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:18:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2018-07-24 12:18:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 6075. [2018-07-24 12:18:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6075 states. [2018-07-24 12:18:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 7757 transitions. [2018-07-24 12:18:59,474 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 7757 transitions. Word has length 209 [2018-07-24 12:18:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:59,474 INFO L471 AbstractCegarLoop]: Abstraction has 6075 states and 7757 transitions. [2018-07-24 12:18:59,474 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:18:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 7757 transitions. [2018-07-24 12:18:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-07-24 12:18:59,480 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:59,480 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:59,481 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1596111931, now seen corresponding path program 1 times [2018-07-24 12:18:59,481 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:59,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:59,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:59,483 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:59,798 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:19:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:19:00,278 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:00,278 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:19:00,278 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:00,279 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:19:00,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:19:00,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:19:00,280 INFO L87 Difference]: Start difference. First operand 6075 states and 7757 transitions. Second operand 6 states. [2018-07-24 12:19:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:03,654 INFO L93 Difference]: Finished difference Result 14223 states and 18680 transitions. [2018-07-24 12:19:03,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:19:03,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 241 [2018-07-24 12:19:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:03,700 INFO L225 Difference]: With dead ends: 14223 [2018-07-24 12:19:03,700 INFO L226 Difference]: Without dead ends: 8154 [2018-07-24 12:19:03,721 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:19:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8154 states. [2018-07-24 12:19:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8154 to 7680. [2018-07-24 12:19:03,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7680 states. [2018-07-24 12:19:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 9579 transitions. [2018-07-24 12:19:03,924 INFO L78 Accepts]: Start accepts. Automaton has 7680 states and 9579 transitions. Word has length 241 [2018-07-24 12:19:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:03,925 INFO L471 AbstractCegarLoop]: Abstraction has 7680 states and 9579 transitions. [2018-07-24 12:19:03,925 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:19:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7680 states and 9579 transitions. [2018-07-24 12:19:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-07-24 12:19:03,942 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:03,943 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:03,943 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash 867542150, now seen corresponding path program 1 times [2018-07-24 12:19:03,943 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:03,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:03,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:03,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:03,945 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:04,289 WARN L169 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:19:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 51 proven. 240 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:19:04,710 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:04,710 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 12:19:04,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:04,723 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:04,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 12:19:05,201 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 149 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:19:05,665 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:05,665 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:05,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:05,683 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:06,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 345 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-07-24 12:19:06,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 149 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:19:06,706 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:06,707 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-07-24 12:19:06,707 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:06,708 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:19:06,709 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:19:06,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:19:06,709 INFO L87 Difference]: Start difference. First operand 7680 states and 9579 transitions. Second operand 9 states. [2018-07-24 12:19:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:19,540 INFO L93 Difference]: Finished difference Result 22460 states and 28543 transitions. [2018-07-24 12:19:19,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-07-24 12:19:19,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 458 [2018-07-24 12:19:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:19,594 INFO L225 Difference]: With dead ends: 22460 [2018-07-24 12:19:19,595 INFO L226 Difference]: Without dead ends: 14786 [2018-07-24 12:19:19,632 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1883 GetRequests, 1844 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-07-24 12:19:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14786 states. [2018-07-24 12:19:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14786 to 14284. [2018-07-24 12:19:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14284 states. [2018-07-24 12:19:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14284 states to 14284 states and 16493 transitions. [2018-07-24 12:19:19,917 INFO L78 Accepts]: Start accepts. Automaton has 14284 states and 16493 transitions. Word has length 458 [2018-07-24 12:19:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:19,918 INFO L471 AbstractCegarLoop]: Abstraction has 14284 states and 16493 transitions. [2018-07-24 12:19:19,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:19:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 14284 states and 16493 transitions. [2018-07-24 12:19:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-07-24 12:19:19,955 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:19,956 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:19,956 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash 625684186, now seen corresponding path program 1 times [2018-07-24 12:19:19,957 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:19,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:19,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:19,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:19,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 427 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-07-24 12:19:21,253 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:21,253 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:21,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:21,269 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:21,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 968 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-07-24 12:19:22,418 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 427 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-07-24 12:19:22,959 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:22,959 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:22,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:22,975 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:23,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 968 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-07-24 12:19:24,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:24,297 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-07-24 12:19:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 427 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-07-24 12:19:25,202 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:25,202 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:19:25,202 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:25,204 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:19:25,204 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:19:25,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:19:25,205 INFO L87 Difference]: Start difference. First operand 14284 states and 16493 transitions. Second operand 9 states. [2018-07-24 12:19:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:32,399 INFO L93 Difference]: Finished difference Result 29012 states and 34255 transitions. [2018-07-24 12:19:32,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:19:32,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 814 [2018-07-24 12:19:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:32,451 INFO L225 Difference]: With dead ends: 29012 [2018-07-24 12:19:32,452 INFO L226 Difference]: Without dead ends: 14734 [2018-07-24 12:19:32,499 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3272 GetRequests, 3253 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:19:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14734 states. [2018-07-24 12:19:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14734 to 14437. [2018-07-24 12:19:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14437 states. [2018-07-24 12:19:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14437 states to 14437 states and 16566 transitions. [2018-07-24 12:19:32,771 INFO L78 Accepts]: Start accepts. Automaton has 14437 states and 16566 transitions. Word has length 814 [2018-07-24 12:19:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:32,773 INFO L471 AbstractCegarLoop]: Abstraction has 14437 states and 16566 transitions. [2018-07-24 12:19:32,773 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:19:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 14437 states and 16566 transitions. [2018-07-24 12:19:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2018-07-24 12:19:32,821 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:32,822 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:19:32,822 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1932208740, now seen corresponding path program 1 times [2018-07-24 12:19:32,823 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:32,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:32,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:32,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:32,824 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:33,520 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:19:33,889 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:19:34,234 WARN L169 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:19:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 681 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-07-24 12:19:36,391 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:36,391 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:36,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:36,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:36,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 485 proven. 0 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2018-07-24 12:19:37,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:37,420 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 5 [2018-07-24 12:19:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 90 proven. 450 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2018-07-24 12:19:38,075 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:19:38,076 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 19 [2018-07-24 12:19:38,076 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:38,077 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:19:38,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:19:38,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:19:38,077 INFO L87 Difference]: Start difference. First operand 14437 states and 16566 transitions. Second operand 5 states. [2018-07-24 12:19:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:44,091 INFO L93 Difference]: Finished difference Result 47971 states and 55592 transitions. [2018-07-24 12:19:44,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:19:44,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 822 [2018-07-24 12:19:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:44,221 INFO L225 Difference]: With dead ends: 47971 [2018-07-24 12:19:44,221 INFO L226 Difference]: Without dead ends: 33540 [2018-07-24 12:19:44,285 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1661 GetRequests, 1639 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:19:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33540 states. [2018-07-24 12:19:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33540 to 31187. [2018-07-24 12:19:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31187 states. [2018-07-24 12:19:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31187 states to 31187 states and 35561 transitions. [2018-07-24 12:19:44,926 INFO L78 Accepts]: Start accepts. Automaton has 31187 states and 35561 transitions. Word has length 822 [2018-07-24 12:19:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:44,927 INFO L471 AbstractCegarLoop]: Abstraction has 31187 states and 35561 transitions. [2018-07-24 12:19:44,927 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:19:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 31187 states and 35561 transitions. [2018-07-24 12:19:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 962 [2018-07-24 12:19:44,972 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:44,973 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 12:19:44,973 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:44,974 INFO L82 PathProgramCache]: Analyzing trace with hash 929429101, now seen corresponding path program 1 times [2018-07-24 12:19:44,974 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:44,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:44,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:44,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:44,975 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:45,818 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:19:46,127 WARN L169 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:19:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 799 proven. 2 refuted. 0 times theorem prover too weak. 1043 trivial. 0 not checked. [2018-07-24 12:19:48,300 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:48,300 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 12:19:48,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:48,308 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:48,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 1203 proven. 2 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2018-07-24 12:19:49,687 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 111 proven. 1138 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-07-24 12:19:51,780 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:51,780 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 12:19:51,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:51,797 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:52,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 1199 proven. 2 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2018-07-24 12:19:53,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 536 proven. 115 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2018-07-24 12:19:54,692 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:54,694 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 5, 5] total 30 [2018-07-24 12:19:54,694 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:54,696 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 12:19:54,696 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 12:19:54,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:19:54,698 INFO L87 Difference]: Start difference. First operand 31187 states and 35561 transitions. Second operand 20 states. [2018-07-24 12:20:01,524 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-07-24 12:20:01,717 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-07-24 12:20:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:19,194 INFO L93 Difference]: Finished difference Result 70374 states and 80795 transitions. [2018-07-24 12:20:19,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-24 12:20:19,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 961 [2018-07-24 12:20:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:19,323 INFO L225 Difference]: With dead ends: 70374 [2018-07-24 12:20:19,323 INFO L226 Difference]: Without dead ends: 39193 [2018-07-24 12:20:19,408 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3936 GetRequests, 3861 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=994, Invalid=4408, Unknown=0, NotChecked=0, Total=5402 [2018-07-24 12:20:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39193 states. [2018-07-24 12:20:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39193 to 35701. [2018-07-24 12:20:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35701 states. [2018-07-24 12:20:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35701 states to 35701 states and 40271 transitions. [2018-07-24 12:20:19,963 INFO L78 Accepts]: Start accepts. Automaton has 35701 states and 40271 transitions. Word has length 961 [2018-07-24 12:20:19,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:19,963 INFO L471 AbstractCegarLoop]: Abstraction has 35701 states and 40271 transitions. [2018-07-24 12:20:19,963 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 12:20:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 35701 states and 40271 transitions. [2018-07-24 12:20:20,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2018-07-24 12:20:20,004 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:20,005 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 12:20:20,005 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash -156954465, now seen corresponding path program 1 times [2018-07-24 12:20:20,006 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:20,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:20,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:20,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:20,007 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-07-24 12:20:22,163 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:22,163 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 12:20:22,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:22,171 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:22,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-07-24 12:20:23,002 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-07-24 12:20:24,232 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:24,232 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 12:20:24,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:24,248 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:24,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:25,537 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:20:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 846 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2018-07-24 12:20:26,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-07-24 12:20:28,324 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:20:28,325 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 6, 5] total 16 [2018-07-24 12:20:28,325 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:20:28,327 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:20:28,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:20:28,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:20:28,328 INFO L87 Difference]: Start difference. First operand 35701 states and 40271 transitions. Second operand 11 states. [2018-07-24 12:20:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:39,802 INFO L93 Difference]: Finished difference Result 71883 states and 82965 transitions. [2018-07-24 12:20:39,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 12:20:39,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1031 [2018-07-24 12:20:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:39,933 INFO L225 Difference]: With dead ends: 71883 [2018-07-24 12:20:39,933 INFO L226 Difference]: Without dead ends: 29004 [2018-07-24 12:20:40,042 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4189 GetRequests, 4141 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2018-07-24 12:20:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29004 states. [2018-07-24 12:20:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29004 to 26611. [2018-07-24 12:20:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26611 states. [2018-07-24 12:20:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26611 states to 26611 states and 28210 transitions. [2018-07-24 12:20:40,511 INFO L78 Accepts]: Start accepts. Automaton has 26611 states and 28210 transitions. Word has length 1031 [2018-07-24 12:20:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:40,513 INFO L471 AbstractCegarLoop]: Abstraction has 26611 states and 28210 transitions. [2018-07-24 12:20:40,513 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:20:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 26611 states and 28210 transitions. [2018-07-24 12:20:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1306 [2018-07-24 12:20:40,573 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:40,574 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:20:40,575 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 213265957, now seen corresponding path program 1 times [2018-07-24 12:20:40,575 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:40,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:40,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:40,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:40,577 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 678 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-07-24 12:20:42,618 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:42,618 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 12:20:42,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:42,626 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:43,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 2499 proven. 2 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2018-07-24 12:20:43,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 678 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-07-24 12:20:44,899 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:44,899 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:44,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:44,916 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:45,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 2499 proven. 2 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2018-07-24 12:20:46,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 678 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-07-24 12:20:47,363 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:20:47,364 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:20:47,364 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:20:47,366 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:20:47,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:20:47,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:20:47,367 INFO L87 Difference]: Start difference. First operand 26611 states and 28210 transitions. Second operand 9 states. [2018-07-24 12:20:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:52,444 INFO L93 Difference]: Finished difference Result 53560 states and 57196 transitions. [2018-07-24 12:20:52,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:20:52,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1305 [2018-07-24 12:20:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:52,515 INFO L225 Difference]: With dead ends: 53560 [2018-07-24 12:20:52,515 INFO L226 Difference]: Without dead ends: 27633 [2018-07-24 12:20:52,563 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5242 GetRequests, 5218 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:20:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27633 states. [2018-07-24 12:20:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27633 to 26271. [2018-07-24 12:20:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26271 states. [2018-07-24 12:20:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26271 states to 26271 states and 27434 transitions. [2018-07-24 12:20:52,932 INFO L78 Accepts]: Start accepts. Automaton has 26271 states and 27434 transitions. Word has length 1305 [2018-07-24 12:20:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:52,933 INFO L471 AbstractCegarLoop]: Abstraction has 26271 states and 27434 transitions. [2018-07-24 12:20:52,933 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:20:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26271 states and 27434 transitions. [2018-07-24 12:20:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1329 [2018-07-24 12:20:52,958 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:52,959 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:52,960 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1447729674, now seen corresponding path program 1 times [2018-07-24 12:20:52,960 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:52,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:52,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:52,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:52,961 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3034 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 2911 trivial. 0 not checked. [2018-07-24 12:20:54,296 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:20:54,297 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:20:54,297 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:54,297 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:20:54,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:20:54,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:20:54,298 INFO L87 Difference]: Start difference. First operand 26271 states and 27434 transitions. Second operand 4 states. [2018-07-24 12:20:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:56,637 INFO L93 Difference]: Finished difference Result 53482 states and 56145 transitions. [2018-07-24 12:20:56,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:20:56,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1328 [2018-07-24 12:20:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:56,684 INFO L225 Difference]: With dead ends: 53482 [2018-07-24 12:20:56,684 INFO L226 Difference]: Without dead ends: 27555 [2018-07-24 12:20:56,719 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 12:20:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27555 states. [2018-07-24 12:20:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27555 to 27008. [2018-07-24 12:20:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27008 states. [2018-07-24 12:20:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27008 states to 27008 states and 28099 transitions. [2018-07-24 12:20:57,046 INFO L78 Accepts]: Start accepts. Automaton has 27008 states and 28099 transitions. Word has length 1328 [2018-07-24 12:20:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:57,047 INFO L471 AbstractCegarLoop]: Abstraction has 27008 states and 28099 transitions. [2018-07-24 12:20:57,047 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:20:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 27008 states and 28099 transitions. [2018-07-24 12:20:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1364 [2018-07-24 12:20:57,068 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:57,069 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-07-24 12:20:57,069 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1792804591, now seen corresponding path program 1 times [2018-07-24 12:20:57,070 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:57,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:57,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:57,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:57,071 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3908 backedges. 819 proven. 110 refuted. 0 times theorem prover too weak. 2979 trivial. 0 not checked. [2018-07-24 12:20:59,523 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:59,524 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:59,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:59,531 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:59,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3908 backedges. 2531 proven. 6 refuted. 0 times theorem prover too weak. 1371 trivial. 0 not checked. [2018-07-24 12:21:01,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3908 backedges. 1376 proven. 361 refuted. 0 times theorem prover too weak. 2171 trivial. 0 not checked. [2018-07-24 12:21:03,290 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:03,290 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:21:03,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:03,312 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:04,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3908 backedges. 1224 proven. 872 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2018-07-24 12:21:05,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:05,719 WARN L169 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-07-24 12:21:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3908 backedges. 1228 proven. 2 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2018-07-24 12:21:08,503 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:08,505 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 5] total 25 [2018-07-24 12:21:08,506 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:08,507 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:21:08,507 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:21:08,508 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:21:08,508 INFO L87 Difference]: Start difference. First operand 27008 states and 28099 transitions. Second operand 13 states. [2018-07-24 12:21:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:25,815 INFO L93 Difference]: Finished difference Result 63136 states and 65880 transitions. [2018-07-24 12:21:25,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 12:21:25,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1363 [2018-07-24 12:21:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:25,898 INFO L225 Difference]: With dead ends: 63136 [2018-07-24 12:21:25,898 INFO L226 Difference]: Without dead ends: 35547 [2018-07-24 12:21:25,949 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5511 GetRequests, 5457 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2018-07-24 12:21:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35547 states. [2018-07-24 12:21:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35547 to 31566. [2018-07-24 12:21:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31566 states. [2018-07-24 12:21:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31566 states to 31566 states and 32795 transitions. [2018-07-24 12:21:26,373 INFO L78 Accepts]: Start accepts. Automaton has 31566 states and 32795 transitions. Word has length 1363 [2018-07-24 12:21:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:26,374 INFO L471 AbstractCegarLoop]: Abstraction has 31566 states and 32795 transitions. [2018-07-24 12:21:26,374 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:21:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31566 states and 32795 transitions. [2018-07-24 12:21:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1387 [2018-07-24 12:21:26,400 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:26,401 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:21:26,402 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -580532200, now seen corresponding path program 1 times [2018-07-24 12:21:26,402 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:26,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:26,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:26,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:26,403 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 1221 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-07-24 12:21:28,973 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:28,973 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:28,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:28,987 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:29,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 1221 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-07-24 12:21:30,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 1221 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-07-24 12:21:33,421 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:33,422 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:21:33,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:33,440 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:34,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 2551 proven. 2 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2018-07-24 12:21:35,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3732 backedges. 606 proven. 336 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2018-07-24 12:21:37,175 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:37,176 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-07-24 12:21:37,176 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:37,177 INFO L450 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-07-24 12:21:37,178 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-07-24 12:21:37,178 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:21:37,178 INFO L87 Difference]: Start difference. First operand 31566 states and 32795 transitions. Second operand 11 states. [2018-07-24 12:21:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:45,877 INFO L93 Difference]: Finished difference Result 62935 states and 65513 transitions. [2018-07-24 12:21:45,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-07-24 12:21:45,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1386 [2018-07-24 12:21:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:45,921 INFO L225 Difference]: With dead ends: 62935 [2018-07-24 12:21:45,922 INFO L226 Difference]: Without dead ends: 24341 [2018-07-24 12:21:45,960 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5599 GetRequests, 5555 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2018-07-24 12:21:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24341 states. [2018-07-24 12:21:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24341 to 22461. [2018-07-24 12:21:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22461 states. [2018-07-24 12:21:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22461 states to 22461 states and 23115 transitions. [2018-07-24 12:21:46,210 INFO L78 Accepts]: Start accepts. Automaton has 22461 states and 23115 transitions. Word has length 1386 [2018-07-24 12:21:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:46,211 INFO L471 AbstractCegarLoop]: Abstraction has 22461 states and 23115 transitions. [2018-07-24 12:21:46,212 INFO L472 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-07-24 12:21:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 22461 states and 23115 transitions. [2018-07-24 12:21:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1403 [2018-07-24 12:21:46,239 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:46,240 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:21:46,240 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash 72524464, now seen corresponding path program 1 times [2018-07-24 12:21:46,241 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:46,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:46,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:46,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:46,242 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:47,294 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:21:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 1971 proven. 602 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2018-07-24 12:21:49,613 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:49,613 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:49,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:49,622 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:50,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 3417 trivial. 0 not checked. [2018-07-24 12:21:50,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 3417 trivial. 0 not checked. [2018-07-24 12:21:52,396 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:21:52,397 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:21:52,397 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:52,398 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:21:52,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:21:52,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:52,399 INFO L87 Difference]: Start difference. First operand 22461 states and 23115 transitions. Second operand 3 states. [2018-07-24 12:21:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:55,864 INFO L93 Difference]: Finished difference Result 44238 states and 45539 transitions. [2018-07-24 12:21:55,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:21:55,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1402 [2018-07-24 12:21:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:55,896 INFO L225 Difference]: With dead ends: 44238 [2018-07-24 12:21:55,896 INFO L226 Difference]: Without dead ends: 22461 [2018-07-24 12:21:55,926 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2821 GetRequests, 2807 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22461 states. [2018-07-24 12:21:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22461 to 21985. [2018-07-24 12:21:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21985 states. [2018-07-24 12:21:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 22554 transitions. [2018-07-24 12:21:56,182 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 22554 transitions. Word has length 1402 [2018-07-24 12:21:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:56,183 INFO L471 AbstractCegarLoop]: Abstraction has 21985 states and 22554 transitions. [2018-07-24 12:21:56,183 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:21:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 22554 transitions. [2018-07-24 12:21:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2043 [2018-07-24 12:21:56,225 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:56,226 INFO L353 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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 12:21:56,226 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2109734358, now seen corresponding path program 1 times [2018-07-24 12:21:56,227 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:56,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:56,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:56,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:56,228 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:58,661 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:22:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7833 backedges. 960 proven. 5276 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2018-07-24 12:22:08,876 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:08,876 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:08,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:08,883 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:09,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7833 backedges. 4607 proven. 2 refuted. 0 times theorem prover too weak. 3224 trivial. 0 not checked. [2018-07-24 12:22:11,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-07-24 12:22:11,672 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:22:11,874 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:11,874 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:22:11,880 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:22:11,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:22:11 BoogieIcfgContainer [2018-07-24 12:22:11,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:22:11,882 INFO L168 Benchmark]: Toolchain (without parser) took 229569.06 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.7 GB in the end (delta: -2.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,883 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:22:11,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1301.18 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,884 INFO L168 Benchmark]: Boogie Procedure Inliner took 234.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,884 INFO L168 Benchmark]: Boogie Preprocessor took 450.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -926.0 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,885 INFO L168 Benchmark]: RCFGBuilder took 6288.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 286.4 MB). Peak memory consumption was 286.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,886 INFO L168 Benchmark]: TraceAbstraction took 221289.14 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 3.7 GB in the end (delta: -1.8 GB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-07-24 12:22:11,891 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1301.18 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 234.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.2 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 450.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -926.0 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6288.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 286.4 MB). Peak memory consumption was 286.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221289.14 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 3.7 GB in the end (delta: -1.8 GB). 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: 52]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 52). Cancelled while BasicCegarLoop was analyzing trace of length 2043 with TraceHistMax 12, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 221.2s OverallTime, 16 OverallIterations, 12 TraceHistogramMax, 128.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2049 SDtfs, 38856 SDslu, 3378 SDs, 0 SdLazy, 71611 SolverSat, 12465 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 100.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34581 GetRequests, 34200 SyntacticMatches, 41 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3351 ImplicationChecksByTransitivity, 18.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35701occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 17849 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 50.3s InterpolantComputationTime, 28674 NumberOfCodeBlocks, 28674 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 45694 ConstructedInterpolants, 14 QuantifiedInterpolants, 149358863 SizeOfPredicates, 17 NumberOfNonLiveVariables, 22886 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 49 InterpolantComputations, 9 PerfectInterpolantSequences, 95816/101991 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/Problem16_label30_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-22-11-905.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label30_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-22-11-905.csv Completed graceful shutdown