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_label03_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:15:28,579 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:15:28,582 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:15:28,594 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:15:28,594 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:15:28,595 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:15:28,597 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:15:28,598 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:15:28,600 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:15:28,601 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:15:28,602 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:15:28,602 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:15:28,603 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:15:28,604 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:15:28,605 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:15:28,606 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:15:28,607 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:15:28,609 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:15:28,611 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:15:28,613 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:15:28,614 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:15:28,615 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:15:28,618 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:15:28,618 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:15:28,618 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:15:28,619 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:15:28,620 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:15:28,621 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:15:28,622 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:15:28,623 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:15:28,623 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:15:28,624 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:15:28,624 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:15:28,625 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:15:28,626 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:15:28,626 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:15:28,627 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 12:15:28,642 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:15:28,642 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:15:28,643 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:15:28,643 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:15:28,643 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:15:28,643 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:15:28,644 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:15:28,644 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:15:28,644 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:15:28,644 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:15:28,644 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:15:28,645 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:15:28,645 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:15:28,645 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:15:28,646 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:15:28,646 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:15:28,646 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:15:28,646 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:15:28,646 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:15:28,647 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:15:28,647 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:15:28,647 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:15:28,647 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:15:28,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:15:28,648 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:15:28,648 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:15:28,648 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:15:28,648 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:15:28,648 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:15:28,648 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:15:28,649 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:15:28,649 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:15:28,649 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:15:28,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:15:28,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:15:28,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:15:28,718 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:15:28,718 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:15:28,719 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-07-24 12:15:29,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dafd6cc19/7fdbe2ac1653485ea135001d63f2a4e0/FLAGcad97615a [2018-07-24 12:15:29,408 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:15:29,410 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label03_false-unreach-call.c [2018-07-24 12:15:29,430 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dafd6cc19/7fdbe2ac1653485ea135001d63f2a4e0/FLAGcad97615a [2018-07-24 12:15:29,451 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dafd6cc19/7fdbe2ac1653485ea135001d63f2a4e0 [2018-07-24 12:15:29,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:15:29,468 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:15:29,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:29,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:15:29,480 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:15:29,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:29" (1/1) ... [2018-07-24 12:15:29,485 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 12:15:29, skipping insertion in model container [2018-07-24 12:15:29,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:29" (1/1) ... [2018-07-24 12:15:29,750 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:15:30,289 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:30,316 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:15:30,573 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:30,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30 WrapperNode [2018-07-24 12:15:30,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:30,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:30,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:15:30,669 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:15:30,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:30,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:30,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:30,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:15:30,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:15:30,849 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:15:31,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (1/1) ... [2018-07-24 12:15:31,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:15:31,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:15:31,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:15:31,322 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:15:31,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (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 12:15:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:15:31,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:15:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:15:31,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:15:31,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:15:31,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:15:31,396 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 12:15:31,396 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 12:15:31,397 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 12:15:31,397 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 12:15:37,335 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:15:37,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:15:37 BoogieIcfgContainer [2018-07-24 12:15:37,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:15:37,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:15:37,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:15:37,350 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:15:37,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:15:29" (1/3) ... [2018-07-24 12:15:37,351 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 12:15:37, skipping insertion in model container [2018-07-24 12:15:37,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:30" (2/3) ... [2018-07-24 12:15:37,352 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 12:15:37, skipping insertion in model container [2018-07-24 12:15:37,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:15:37" (3/3) ... [2018-07-24 12:15:37,354 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label03_false-unreach-call.c [2018-07-24 12:15:37,362 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:15:37,371 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:15:37,432 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:15:37,432 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:15:37,433 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:15:37,433 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:15:37,433 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:15:37,433 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:15:37,433 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:15:37,433 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:15:37,434 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:15:37,479 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:15:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-07-24 12:15:37,492 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:37,493 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:15:37,494 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 12:15:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash 195407155, now seen corresponding path program 1 times [2018-07-24 12:15:37,503 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:37,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:37,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:37,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:37,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:37,777 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 12:15:37,782 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:15:37,782 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:15:37,783 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:15:37,788 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:15:37,804 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:15:37,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:15:37,808 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:15:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:15:42,191 INFO L93 Difference]: Finished difference Result 1171 states and 2159 transitions. [2018-07-24 12:15:42,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:15:42,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-07-24 12:15:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:15:42,225 INFO L225 Difference]: With dead ends: 1171 [2018-07-24 12:15:42,225 INFO L226 Difference]: Without dead ends: 759 [2018-07-24 12:15:42,234 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:15:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-07-24 12:15:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 759. [2018-07-24 12:15:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-07-24 12:15:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1372 transitions. [2018-07-24 12:15:42,343 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1372 transitions. Word has length 13 [2018-07-24 12:15:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:15:42,343 INFO L471 AbstractCegarLoop]: Abstraction has 759 states and 1372 transitions. [2018-07-24 12:15:42,344 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:15:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1372 transitions. [2018-07-24 12:15:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-07-24 12:15:42,349 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:42,349 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:15:42,349 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 12:15:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1233688804, now seen corresponding path program 1 times [2018-07-24 12:15:42,350 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:42,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:42,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:42,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:42,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:15:42,684 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:15:42,684 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:15:42,684 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:15:42,686 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:15:42,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:15:42,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:15:42,687 INFO L87 Difference]: Start difference. First operand 759 states and 1372 transitions. Second operand 5 states. [2018-07-24 12:15:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:15:50,814 INFO L93 Difference]: Finished difference Result 2226 states and 4122 transitions. [2018-07-24 12:15:50,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:15:50,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2018-07-24 12:15:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:15:50,831 INFO L225 Difference]: With dead ends: 2226 [2018-07-24 12:15:50,832 INFO L226 Difference]: Without dead ends: 1473 [2018-07-24 12:15:50,836 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:15:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2018-07-24 12:15:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1453. [2018-07-24 12:15:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1453 states. [2018-07-24 12:15:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2566 transitions. [2018-07-24 12:15:50,925 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2566 transitions. Word has length 83 [2018-07-24 12:15:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:15:50,926 INFO L471 AbstractCegarLoop]: Abstraction has 1453 states and 2566 transitions. [2018-07-24 12:15:50,926 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:15:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2566 transitions. [2018-07-24 12:15:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-07-24 12:15:50,932 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:50,935 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:15:50,936 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 12:15:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1725317127, now seen corresponding path program 1 times [2018-07-24 12:15:50,936 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:50,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:50,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:50,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:50,938 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:15:51,207 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:15:51,207 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:15:51,207 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:15:51,208 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:15:51,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:15:51,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:15:51,209 INFO L87 Difference]: Start difference. First operand 1453 states and 2566 transitions. Second operand 6 states. [2018-07-24 12:15:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:15:56,782 INFO L93 Difference]: Finished difference Result 4267 states and 7561 transitions. [2018-07-24 12:15:56,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:15:56,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2018-07-24 12:15:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:15:56,804 INFO L225 Difference]: With dead ends: 4267 [2018-07-24 12:15:56,805 INFO L226 Difference]: Without dead ends: 2820 [2018-07-24 12:15:56,815 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:15:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2018-07-24 12:15:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2802. [2018-07-24 12:15:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2018-07-24 12:15:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4369 transitions. [2018-07-24 12:15:56,915 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4369 transitions. Word has length 86 [2018-07-24 12:15:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:15:56,916 INFO L471 AbstractCegarLoop]: Abstraction has 2802 states and 4369 transitions. [2018-07-24 12:15:56,916 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:15:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4369 transitions. [2018-07-24 12:15:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-07-24 12:15:56,920 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:15:56,921 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:15:56,921 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 12:15:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1304386772, now seen corresponding path program 1 times [2018-07-24 12:15:56,923 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:15:56,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:56,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:15:56,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:15:56,925 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:15:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:15:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:15:57,133 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:15:57,133 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:15:57,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:15:57,134 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:15:57,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:15:57,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:15:57,134 INFO L87 Difference]: Start difference. First operand 2802 states and 4369 transitions. Second operand 6 states. [2018-07-24 12:16:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:00,846 INFO L93 Difference]: Finished difference Result 7019 states and 11260 transitions. [2018-07-24 12:16:00,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:00,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2018-07-24 12:16:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:00,873 INFO L225 Difference]: With dead ends: 7019 [2018-07-24 12:16:00,873 INFO L226 Difference]: Without dead ends: 4223 [2018-07-24 12:16:00,886 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 12:16:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2018-07-24 12:16:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4203. [2018-07-24 12:16:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4203 states. [2018-07-24 12:16:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 5930 transitions. [2018-07-24 12:16:01,005 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 5930 transitions. Word has length 87 [2018-07-24 12:16:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:01,006 INFO L471 AbstractCegarLoop]: Abstraction has 4203 states and 5930 transitions. [2018-07-24 12:16:01,006 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 5930 transitions. [2018-07-24 12:16:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-07-24 12:16:01,007 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:01,008 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:16:01,008 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 12:16:01,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1951130943, now seen corresponding path program 1 times [2018-07-24 12:16:01,008 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:01,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:01,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:01,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:01,010 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:01,226 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:01,226 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:01,226 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:01,227 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:01,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:01,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:01,227 INFO L87 Difference]: Start difference. First operand 4203 states and 5930 transitions. Second operand 6 states. [2018-07-24 12:16:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:10,056 INFO L93 Difference]: Finished difference Result 11184 states and 16123 transitions. [2018-07-24 12:16:10,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:10,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2018-07-24 12:16:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:10,094 INFO L225 Difference]: With dead ends: 11184 [2018-07-24 12:16:10,094 INFO L226 Difference]: Without dead ends: 6987 [2018-07-24 12:16:10,122 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 12:16:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2018-07-24 12:16:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6943. [2018-07-24 12:16:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6943 states. [2018-07-24 12:16:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 9581 transitions. [2018-07-24 12:16:10,301 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 9581 transitions. Word has length 90 [2018-07-24 12:16:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:10,302 INFO L471 AbstractCegarLoop]: Abstraction has 6943 states and 9581 transitions. [2018-07-24 12:16:10,302 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 9581 transitions. [2018-07-24 12:16:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-07-24 12:16:10,304 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:10,304 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:16:10,304 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 12:16:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1229380976, now seen corresponding path program 1 times [2018-07-24 12:16:10,305 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:10,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:10,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:10,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:10,306 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:10,565 WARN L169 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:16:10,721 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:10,721 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 12:16:10,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:10,739 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:10,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:10,974 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:11,374 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:16:11,374 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-07-24 12:16:11,374 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:11,375 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:11,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:11,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:16:11,378 INFO L87 Difference]: Start difference. First operand 6943 states and 9581 transitions. Second operand 3 states. [2018-07-24 12:16:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:15,883 INFO L93 Difference]: Finished difference Result 18227 states and 25587 transitions. [2018-07-24 12:16:15,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:15,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2018-07-24 12:16:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:15,951 INFO L225 Difference]: With dead ends: 18227 [2018-07-24 12:16:15,952 INFO L226 Difference]: Without dead ends: 11290 [2018-07-24 12:16:15,998 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:16:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11290 states. [2018-07-24 12:16:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11290 to 11290. [2018-07-24 12:16:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11290 states. [2018-07-24 12:16:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 14659 transitions. [2018-07-24 12:16:16,285 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 14659 transitions. Word has length 105 [2018-07-24 12:16:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:16,286 INFO L471 AbstractCegarLoop]: Abstraction has 11290 states and 14659 transitions. [2018-07-24 12:16:16,286 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 14659 transitions. [2018-07-24 12:16:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-07-24 12:16:16,288 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:16,288 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:16:16,288 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 12:16:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 607624049, now seen corresponding path program 1 times [2018-07-24 12:16:16,289 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:16,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:16,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:16,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:16,290 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:16,548 WARN L169 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-07-24 12:16:16,765 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:16,766 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 12:16:16,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:16,781 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:16,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:16,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:17,281 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:16:17,281 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2018-07-24 12:16:17,281 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:17,282 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:17,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:17,282 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:16:17,282 INFO L87 Difference]: Start difference. First operand 11290 states and 14659 transitions. Second operand 3 states. [2018-07-24 12:16:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:20,103 INFO L93 Difference]: Finished difference Result 25587 states and 33613 transitions. [2018-07-24 12:16:20,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:20,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2018-07-24 12:16:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:20,168 INFO L225 Difference]: With dead ends: 25587 [2018-07-24 12:16:20,168 INFO L226 Difference]: Without dead ends: 14303 [2018-07-24 12:16:20,205 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:16:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2018-07-24 12:16:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 14303. [2018-07-24 12:16:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14303 states. [2018-07-24 12:16:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 17936 transitions. [2018-07-24 12:16:20,491 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 17936 transitions. Word has length 114 [2018-07-24 12:16:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:20,491 INFO L471 AbstractCegarLoop]: Abstraction has 14303 states and 17936 transitions. [2018-07-24 12:16:20,491 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 17936 transitions. [2018-07-24 12:16:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-07-24 12:16:20,506 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:20,507 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:16:20,507 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 12:16:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash 898020373, now seen corresponding path program 1 times [2018-07-24 12:16:20,508 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:20,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:20,509 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:21,056 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:16:21,377 WARN L169 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:16:21,825 WARN L169 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:16:22,188 WARN L169 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2018-07-24 12:16:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:22,910 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:22,910 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:22,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:22,923 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:23,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:23,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:23,848 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:23,849 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:23,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:23,864 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:24,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:24,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:24,689 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:16:24,689 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 5, 5] total 25 [2018-07-24 12:16:24,689 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:16:24,690 INFO L450 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-07-24 12:16:24,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-07-24 12:16:24,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:16:24,691 INFO L87 Difference]: Start difference. First operand 14303 states and 17936 transitions. Second operand 16 states. [2018-07-24 12:16:44,562 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-07-24 12:16:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:45,577 INFO L93 Difference]: Finished difference Result 38457 states and 49884 transitions. [2018-07-24 12:16:45,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-07-24 12:16:45,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 345 [2018-07-24 12:16:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:45,654 INFO L225 Difference]: With dead ends: 38457 [2018-07-24 12:16:45,654 INFO L226 Difference]: Without dead ends: 19720 [2018-07-24 12:16:45,746 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1466 GetRequests, 1395 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1063, Invalid=4193, Unknown=0, NotChecked=0, Total=5256 [2018-07-24 12:16:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19720 states. [2018-07-24 12:16:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19720 to 18344. [2018-07-24 12:16:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18344 states. [2018-07-24 12:16:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18344 states to 18344 states and 20401 transitions. [2018-07-24 12:16:46,143 INFO L78 Accepts]: Start accepts. Automaton has 18344 states and 20401 transitions. Word has length 345 [2018-07-24 12:16:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:46,144 INFO L471 AbstractCegarLoop]: Abstraction has 18344 states and 20401 transitions. [2018-07-24 12:16:46,144 INFO L472 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-07-24 12:16:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18344 states and 20401 transitions. [2018-07-24 12:16:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-07-24 12:16:46,160 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:46,161 INFO L353 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:46,161 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 12:16:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1339008958, now seen corresponding path program 1 times [2018-07-24 12:16:46,161 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:46,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:46,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:46,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:46,163 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:46,745 WARN L169 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:16:47,230 WARN L169 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-07-24 12:16:48,134 WARN L169 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2018-07-24 12:16:48,748 WARN L169 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2018-07-24 12:16:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 122 proven. 129 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-07-24 12:16:49,269 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:49,269 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:49,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:49,277 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:49,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:16:49,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:16:50,041 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:50,041 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:50,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:50,057 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:50,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:16:50,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:16:50,791 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:16:50,792 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 19 [2018-07-24 12:16:50,792 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:16:50,793 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:16:50,793 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:16:50,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:16:50,793 INFO L87 Difference]: Start difference. First operand 18344 states and 20401 transitions. Second operand 13 states. [2018-07-24 12:16:51,291 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2018-07-24 12:16:54,895 WARN L169 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-07-24 12:16:56,512 WARN L169 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-07-24 12:16:58,371 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-07-24 12:16:59,582 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-07-24 12:17:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:00,846 INFO L93 Difference]: Finished difference Result 37950 states and 42387 transitions. [2018-07-24 12:17:00,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 12:17:00,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 389 [2018-07-24 12:17:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:00,905 INFO L225 Difference]: With dead ends: 37950 [2018-07-24 12:17:00,905 INFO L226 Difference]: Without dead ends: 21643 [2018-07-24 12:17:00,942 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1617 GetRequests, 1569 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 12:17:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21643 states. [2018-07-24 12:17:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21643 to 20595. [2018-07-24 12:17:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20595 states. [2018-07-24 12:17:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 22260 transitions. [2018-07-24 12:17:01,264 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 22260 transitions. Word has length 389 [2018-07-24 12:17:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:01,264 INFO L471 AbstractCegarLoop]: Abstraction has 20595 states and 22260 transitions. [2018-07-24 12:17:01,265 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:17:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 22260 transitions. [2018-07-24 12:17:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-07-24 12:17:01,282 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:01,282 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:01,283 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 12:17:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 883075071, now seen corresponding path program 1 times [2018-07-24 12:17:01,283 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:01,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:01,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:01,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:01,285 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:01,695 WARN L169 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:17:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 16 proven. 219 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 12:17:02,630 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:02,630 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 12:17:02,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:02,646 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:02,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 12:17:03,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 12:17:03,940 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:17:03,941 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:17:03,941 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:17:03,942 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:17:03,942 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:17:03,942 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:17:03,942 INFO L87 Difference]: Start difference. First operand 20595 states and 22260 transitions. Second operand 3 states. [2018-07-24 12:17:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:05,428 INFO L93 Difference]: Finished difference Result 39139 states and 42379 transitions. [2018-07-24 12:17:05,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:17:05,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2018-07-24 12:17:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:05,486 INFO L225 Difference]: With dead ends: 39139 [2018-07-24 12:17:05,486 INFO L226 Difference]: Without dead ends: 20595 [2018-07-24 12:17:05,519 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 956 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:17:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20595 states. [2018-07-24 12:17:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20595 to 20254. [2018-07-24 12:17:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20254 states. [2018-07-24 12:17:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20254 states to 20254 states and 21580 transitions. [2018-07-24 12:17:05,803 INFO L78 Accepts]: Start accepts. Automaton has 20254 states and 21580 transitions. Word has length 478 [2018-07-24 12:17:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:05,804 INFO L471 AbstractCegarLoop]: Abstraction has 20254 states and 21580 transitions. [2018-07-24 12:17:05,804 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:17:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20254 states and 21580 transitions. [2018-07-24 12:17:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-07-24 12:17:05,845 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:05,845 INFO L353 BasicCegarLoop]: trace histogram [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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:05,846 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 12:17:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1014147118, now seen corresponding path program 1 times [2018-07-24 12:17:05,846 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:05,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:05,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:05,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:05,847 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 348 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-07-24 12:17:06,726 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:06,726 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:06,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:06,735 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:06,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 12:17:07,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-07-24 12:17:07,793 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:07,793 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 10 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 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:07,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:07,813 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:08,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 350 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 12:17:08,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 350 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 12:17:09,013 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:09,014 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-07-24 12:17:09,015 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:09,016 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:17:09,016 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:17:09,016 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:17:09,016 INFO L87 Difference]: Start difference. First operand 20254 states and 21580 transitions. Second operand 9 states. [2018-07-24 12:17:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:13,954 INFO L93 Difference]: Finished difference Result 41002 states and 44376 transitions. [2018-07-24 12:17:13,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:17:13,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 597 [2018-07-24 12:17:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:14,022 INFO L225 Difference]: With dead ends: 41002 [2018-07-24 12:17:14,022 INFO L226 Difference]: Without dead ends: 22799 [2018-07-24 12:17:14,055 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2406 GetRequests, 2383 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:17:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22799 states. [2018-07-24 12:17:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22799 to 19862. [2018-07-24 12:17:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19862 states. [2018-07-24 12:17:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 21026 transitions. [2018-07-24 12:17:14,435 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 21026 transitions. Word has length 597 [2018-07-24 12:17:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:14,436 INFO L471 AbstractCegarLoop]: Abstraction has 19862 states and 21026 transitions. [2018-07-24 12:17:14,436 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:17:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 21026 transitions. [2018-07-24 12:17:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2018-07-24 12:17:14,468 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:14,469 INFO L353 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:14,469 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 12:17:14,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1059782620, now seen corresponding path program 1 times [2018-07-24 12:17:14,469 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:14,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:14,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,471 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 253 proven. 298 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-07-24 12:17:15,873 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:15,874 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:15,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:15,882 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:16,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1256 proven. 2 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-07-24 12:17:16,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 253 proven. 298 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-07-24 12:17:17,288 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:17,288 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 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:17,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:17,303 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:18,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 1256 proven. 2 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-07-24 12:17:18,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1708 backedges. 253 proven. 298 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-07-24 12:17:19,179 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:19,180 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:17:19,180 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:19,182 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:17:19,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:17:19,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:17:19,183 INFO L87 Difference]: Start difference. First operand 19862 states and 21026 transitions. Second operand 9 states. [2018-07-24 12:17:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:23,531 INFO L93 Difference]: Finished difference Result 41714 states and 44200 transitions. [2018-07-24 12:17:23,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:17:23,531 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1012 [2018-07-24 12:17:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:23,579 INFO L225 Difference]: With dead ends: 41714 [2018-07-24 12:17:23,580 INFO L226 Difference]: Without dead ends: 22213 [2018-07-24 12:17:23,610 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4064 GetRequests, 4045 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:17:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22213 states. [2018-07-24 12:17:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22213 to 21711. [2018-07-24 12:17:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21711 states. [2018-07-24 12:17:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21711 states to 21711 states and 22822 transitions. [2018-07-24 12:17:23,955 INFO L78 Accepts]: Start accepts. Automaton has 21711 states and 22822 transitions. Word has length 1012 [2018-07-24 12:17:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:23,956 INFO L471 AbstractCegarLoop]: Abstraction has 21711 states and 22822 transitions. [2018-07-24 12:17:23,957 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:17:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21711 states and 22822 transitions. [2018-07-24 12:17:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1014 [2018-07-24 12:17:23,986 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:23,987 INFO L353 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:23,987 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 12:17:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1957126565, now seen corresponding path program 1 times [2018-07-24 12:17:23,988 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:23,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:23,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:23,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:23,989 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-07-24 12:17:25,028 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:25,028 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:25,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:25,037 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:25,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-07-24 12:17:25,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-07-24 12:17:26,528 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:26,528 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:26,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:26,543 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:27,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-07-24 12:17:27,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 409 proven. 2 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2018-07-24 12:17:28,254 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:28,254 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:17:28,255 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:28,256 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:17:28,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:17:28,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:17:28,257 INFO L87 Difference]: Start difference. First operand 21711 states and 22822 transitions. Second operand 9 states. [2018-07-24 12:17:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:33,086 INFO L93 Difference]: Finished difference Result 45393 states and 48191 transitions. [2018-07-24 12:17:33,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:17:33,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1013 [2018-07-24 12:17:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:33,147 INFO L225 Difference]: With dead ends: 45393 [2018-07-24 12:17:33,148 INFO L226 Difference]: Without dead ends: 24043 [2018-07-24 12:17:33,182 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4068 GetRequests, 4049 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:17:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24043 states. [2018-07-24 12:17:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24043 to 23691. [2018-07-24 12:17:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23691 states. [2018-07-24 12:17:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 24962 transitions. [2018-07-24 12:17:33,590 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 24962 transitions. Word has length 1013 [2018-07-24 12:17:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:33,591 INFO L471 AbstractCegarLoop]: Abstraction has 23691 states and 24962 transitions. [2018-07-24 12:17:33,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:17:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 24962 transitions. [2018-07-24 12:17:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1037 [2018-07-24 12:17:33,632 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:33,633 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:33,633 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 12:17:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2082410601, now seen corresponding path program 1 times [2018-07-24 12:17:33,634 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:33,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:33,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:33,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:33,635 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 42 proven. 743 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:34,712 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:34,712 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:34,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:34,720 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:35,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 773 proven. 0 refuted. 0 times theorem prover too weak. 1508 trivial. 0 not checked. [2018-07-24 12:17:35,778 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 42 proven. 743 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:37,284 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:17:37,285 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2018-07-24 12:17:37,285 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:17:37,286 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:17:37,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:17:37,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:17:37,286 INFO L87 Difference]: Start difference. First operand 23691 states and 24962 transitions. Second operand 5 states. [2018-07-24 12:17:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:40,789 INFO L93 Difference]: Finished difference Result 51635 states and 53989 transitions. [2018-07-24 12:17:40,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:17:40,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1036 [2018-07-24 12:17:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:40,834 INFO L225 Difference]: With dead ends: 51635 [2018-07-24 12:17:40,834 INFO L226 Difference]: Without dead ends: 27955 [2018-07-24 12:17:40,870 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2079 GetRequests, 2068 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:17:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27955 states. [2018-07-24 12:17:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27955 to 25265. [2018-07-24 12:17:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25265 states. [2018-07-24 12:17:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25265 states to 25265 states and 26168 transitions. [2018-07-24 12:17:41,233 INFO L78 Accepts]: Start accepts. Automaton has 25265 states and 26168 transitions. Word has length 1036 [2018-07-24 12:17:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:41,234 INFO L471 AbstractCegarLoop]: Abstraction has 25265 states and 26168 transitions. [2018-07-24 12:17:41,234 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:17:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 25265 states and 26168 transitions. [2018-07-24 12:17:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2018-07-24 12:17:41,277 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:41,278 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:41,278 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 12:17:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1811553132, now seen corresponding path program 1 times [2018-07-24 12:17:41,279 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:41,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:41,280 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:42,243 WARN L169 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:17:42,515 WARN L169 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:17:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 622 proven. 195 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2018-07-24 12:17:43,981 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:43,982 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 12:17:43,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:43,991 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:44,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 1794 proven. 6 refuted. 0 times theorem prover too weak. 1508 trivial. 0 not checked. [2018-07-24 12:17:45,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 79 proven. 1733 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:49,410 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:49,410 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 12:17:49,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:49,426 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:50,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 1553 proven. 6 refuted. 0 times theorem prover too weak. 1749 trivial. 0 not checked. [2018-07-24 12:17:52,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 81 proven. 1731 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-07-24 12:17:58,672 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:58,673 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 8] total 28 [2018-07-24 12:17:58,673 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:58,675 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:17:58,675 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:17:58,676 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2018-07-24 12:17:58,676 INFO L87 Difference]: Start difference. First operand 25265 states and 26168 transitions. Second operand 13 states. [2018-07-24 12:18:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:12,304 INFO L93 Difference]: Finished difference Result 53668 states and 55588 transitions. [2018-07-24 12:18:12,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-07-24 12:18:12,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1284 [2018-07-24 12:18:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:12,364 INFO L225 Difference]: With dead ends: 53668 [2018-07-24 12:18:12,364 INFO L226 Difference]: Without dead ends: 28750 [2018-07-24 12:18:12,403 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5176 GetRequests, 5129 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 12:18:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28750 states. [2018-07-24 12:18:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28750 to 27710. [2018-07-24 12:18:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27710 states. [2018-07-24 12:18:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27710 states to 27710 states and 28629 transitions. [2018-07-24 12:18:12,785 INFO L78 Accepts]: Start accepts. Automaton has 27710 states and 28629 transitions. Word has length 1284 [2018-07-24 12:18:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:12,786 INFO L471 AbstractCegarLoop]: Abstraction has 27710 states and 28629 transitions. [2018-07-24 12:18:12,786 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:18:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 27710 states and 28629 transitions. [2018-07-24 12:18:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1338 [2018-07-24 12:18:12,808 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:12,809 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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, 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, 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, 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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:12,809 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 12:18:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash -954414094, now seen corresponding path program 1 times [2018-07-24 12:18:12,810 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:12,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:12,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:12,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:12,811 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:13,966 WARN L169 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-07-24 12:18:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4087 backedges. 1101 proven. 87 refuted. 0 times theorem prover too weak. 2899 trivial. 0 not checked. [2018-07-24 12:18:15,565 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:15,565 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 12:18:15,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:15,573 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:15,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:16,502 WARN L169 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-07-24 12:18:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4087 backedges. 1929 proven. 2 refuted. 0 times theorem prover too weak. 2156 trivial. 0 not checked. [2018-07-24 12:18:17,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4087 backedges. 90 proven. 1855 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2018-07-24 12:18:20,034 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:20,034 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:18:20,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:20,050 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:20,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4087 backedges. 2755 proven. 2 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2018-07-24 12:18:22,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4087 backedges. 560 proven. 421 refuted. 0 times theorem prover too weak. 3106 trivial. 0 not checked. [2018-07-24 12:18:23,966 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:23,968 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 5, 5] total 24 [2018-07-24 12:18:23,968 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:23,969 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:18:23,969 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:18:23,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:18:23,970 INFO L87 Difference]: Start difference. First operand 27710 states and 28629 transitions. Second operand 14 states. [2018-07-24 12:18:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:39,947 INFO L93 Difference]: Finished difference Result 58009 states and 60011 transitions. [2018-07-24 12:18:39,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-24 12:18:39,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1337 [2018-07-24 12:18:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:39,982 INFO L225 Difference]: With dead ends: 58009 [2018-07-24 12:18:39,982 INFO L226 Difference]: Without dead ends: 20924 [2018-07-24 12:18:40,012 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5427 GetRequests, 5365 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=627, Invalid=3033, Unknown=0, NotChecked=0, Total=3660 [2018-07-24 12:18:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20924 states. [2018-07-24 12:18:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20924 to 19287. [2018-07-24 12:18:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19287 states. [2018-07-24 12:18:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19287 states to 19287 states and 19814 transitions. [2018-07-24 12:18:40,248 INFO L78 Accepts]: Start accepts. Automaton has 19287 states and 19814 transitions. Word has length 1337 [2018-07-24 12:18:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:40,249 INFO L471 AbstractCegarLoop]: Abstraction has 19287 states and 19814 transitions. [2018-07-24 12:18:40,249 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:18:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 19287 states and 19814 transitions. [2018-07-24 12:18:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1500 [2018-07-24 12:18:40,272 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:40,273 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 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] [2018-07-24 12:18:40,274 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash -486189728, now seen corresponding path program 1 times [2018-07-24 12:18:40,274 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:40,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:40,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:40,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:40,275 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4251 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 4173 trivial. 0 not checked. [2018-07-24 12:18:41,644 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:18:41,644 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:18:41,645 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:18:41,646 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:18:41,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:18:41,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:18:41,646 INFO L87 Difference]: Start difference. First operand 19287 states and 19814 transitions. Second operand 3 states. [2018-07-24 12:18:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:43,125 INFO L93 Difference]: Finished difference Result 37542 states and 38591 transitions. [2018-07-24 12:18:43,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:18:43,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1499 [2018-07-24 12:18:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:43,153 INFO L225 Difference]: With dead ends: 37542 [2018-07-24 12:18:43,153 INFO L226 Difference]: Without dead ends: 14672 [2018-07-24 12:18:43,176 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:18:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14672 states. [2018-07-24 12:18:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14672 to 13681. [2018-07-24 12:18:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13681 states. [2018-07-24 12:18:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13681 states to 13681 states and 13984 transitions. [2018-07-24 12:18:43,322 INFO L78 Accepts]: Start accepts. Automaton has 13681 states and 13984 transitions. Word has length 1499 [2018-07-24 12:18:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:43,324 INFO L471 AbstractCegarLoop]: Abstraction has 13681 states and 13984 transitions. [2018-07-24 12:18:43,324 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:18:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13681 states and 13984 transitions. [2018-07-24 12:18:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1722 [2018-07-24 12:18:43,349 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:43,349 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:18:43,350 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:18:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1179400812, now seen corresponding path program 1 times [2018-07-24 12:18:43,350 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:43,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:43,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:43,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:43,351 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 922 proven. 594 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2018-07-24 12:18:48,170 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:48,171 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:18:48,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:48,178 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:48,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3352 proven. 2 refuted. 0 times theorem prover too weak. 1526 trivial. 0 not checked. [2018-07-24 12:18:50,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 922 proven. 594 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2018-07-24 12:18:54,193 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:54,194 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 21 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 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:18:54,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:54,211 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:55,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3160 proven. 2 refuted. 0 times theorem prover too weak. 1718 trivial. 0 not checked. [2018-07-24 12:18:56,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 560 proven. 410 refuted. 0 times theorem prover too weak. 3910 trivial. 0 not checked. [2018-07-24 12:18:59,389 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:59,391 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 22 [2018-07-24 12:18:59,391 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:59,392 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 12:18:59,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 12:18:59,393 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2018-07-24 12:18:59,393 INFO L87 Difference]: Start difference. First operand 13681 states and 13984 transitions. Second operand 15 states. [2018-07-24 12:19:00,226 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-07-24 12:19:07,202 WARN L169 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2018-07-24 12:19:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:08,391 INFO L93 Difference]: Finished difference Result 25330 states and 25906 transitions. [2018-07-24 12:19:08,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-07-24 12:19:08,391 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1721 [2018-07-24 12:19:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:08,407 INFO L225 Difference]: With dead ends: 25330 [2018-07-24 12:19:08,407 INFO L226 Difference]: Without dead ends: 12337 [2018-07-24 12:19:08,415 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6941 GetRequests, 6888 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2018-07-24 12:19:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12337 states. [2018-07-24 12:19:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12337 to 11671. [2018-07-24 12:19:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11671 states. [2018-07-24 12:19:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 11907 transitions. [2018-07-24 12:19:08,537 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 11907 transitions. Word has length 1721 [2018-07-24 12:19:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:08,538 INFO L471 AbstractCegarLoop]: Abstraction has 11671 states and 11907 transitions. [2018-07-24 12:19:08,538 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 12:19:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 11907 transitions. [2018-07-24 12:19:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1911 [2018-07-24 12:19:08,571 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:08,571 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:08,572 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2138617938, now seen corresponding path program 1 times [2018-07-24 12:19:08,572 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:08,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:08,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:08,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:08,573 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-07-24 12:19:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6220 backedges. 840 proven. 4346 refuted. 0 times theorem prover too weak. 1034 trivial. 0 not checked. [2018-07-24 12:19:18,616 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:18,616 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:18,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:18,625 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:19,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:19,219 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:19:19,421 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:19,421 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:19:19,427 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:19:19,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:19:19 BoogieIcfgContainer [2018-07-24 12:19:19,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:19:19,429 INFO L168 Benchmark]: Toolchain (without parser) took 229962.80 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 619.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:19,430 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:19:19,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1199.01 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 12:19:19,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 179.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:19,432 INFO L168 Benchmark]: Boogie Preprocessor took 473.50 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 819.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -954.7 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:19,432 INFO L168 Benchmark]: RCFGBuilder took 6014.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 271.4 MB). Peak memory consumption was 271.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:19,433 INFO L168 Benchmark]: TraceAbstraction took 222090.83 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 356.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:19,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1199.01 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 179.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 473.50 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 819.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -954.7 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6014.17 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 271.4 MB). Peak memory consumption was 271.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222090.83 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 356.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 1911 with TraceHistMax 11, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 222.0s OverallTime, 19 OverallIterations, 11 TraceHistogramMax, 129.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3222 SDtfs, 40861 SDslu, 3731 SDs, 0 SdLazy, 74941 SolverSat, 8611 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 99.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34708 GetRequests, 34296 SyntacticMatches, 47 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 24.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27710occurred in iteration=15, 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: 4.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 13682 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 8.3s SatisfiabilityAnalysisTime, 56.4s InterpolantComputationTime, 28418 NumberOfCodeBlocks, 28418 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 45489 ConstructedInterpolants, 14 QuantifiedInterpolants, 191290151 SizeOfPredicates, 23 NumberOfNonLiveVariables, 23334 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 58 InterpolantComputations, 13 PerfectInterpolantSequences, 84574/95043 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_label03_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-19-19-452.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label03_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-19-19-452.csv Completed graceful shutdown