java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 10:23:39,464 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 10:23:39,466 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 10:23:39,483 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 10:23:39,484 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 10:23:39,485 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 10:23:39,486 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 10:23:39,488 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 10:23:39,489 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 10:23:39,490 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 10:23:39,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 10:23:39,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 10:23:39,492 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 10:23:39,493 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 10:23:39,495 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 10:23:39,495 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 10:23:39,496 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 10:23:39,498 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 10:23:39,500 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 10:23:39,502 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 10:23:39,503 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 10:23:39,504 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 10:23:39,507 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 10:23:39,507 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 10:23:39,507 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 10:23:39,508 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 10:23:39,509 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 10:23:39,510 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 10:23:39,511 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 10:23:39,512 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 10:23:39,512 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 10:23:39,513 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 10:23:39,513 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 10:23:39,514 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 10:23:39,515 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 10:23:39,515 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 10:23:39,516 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 10:23:39,532 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 10:23:39,532 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 10:23:39,533 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 10:23:39,533 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 10:23:39,533 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 10:23:39,533 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 10:23:39,534 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 10:23:39,534 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 10:23:39,534 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 10:23:39,534 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 10:23:39,534 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 10:23:39,535 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 10:23:39,535 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 10:23:39,535 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 10:23:39,535 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 10:23:39,536 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 10:23:39,536 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 10:23:39,536 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 10:23:39,536 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 10:23:39,536 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 10:23:39,537 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 10:23:39,537 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 10:23:39,537 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 10:23:39,537 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:23:39,537 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 10:23:39,538 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 10:23:39,538 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 10:23:39,538 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 10:23:39,538 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 10:23:39,538 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 10:23:39,539 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 10:23:39,539 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 10:23:39,539 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 10:23:39,599 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 10:23:39,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 10:23:39,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 10:23:39,620 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 10:23:39,620 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 10:23:39,621 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-09-10 10:23:39,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80e523ca8/540c4e86bbb24dc8b9c06e6d9e5ddf8a/FLAGe6556b5f4 [2018-09-10 10:23:40,354 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 10:23:40,355 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label04_true-unreach-call.c [2018-09-10 10:23:40,380 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80e523ca8/540c4e86bbb24dc8b9c06e6d9e5ddf8a/FLAGe6556b5f4 [2018-09-10 10:23:40,395 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80e523ca8/540c4e86bbb24dc8b9c06e6d9e5ddf8a [2018-09-10 10:23:40,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 10:23:40,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 10:23:40,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:40,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 10:23:40,420 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 10:23:40,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:40" (1/1) ... [2018-09-10 10:23:40,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423cff25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:40, skipping insertion in model container [2018-09-10 10:23:40,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 10:23:40" (1/1) ... [2018-09-10 10:23:40,686 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 10:23:41,216 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:41,236 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 10:23:41,462 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 10:23:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41 WrapperNode [2018-09-10 10:23:41,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 10:23:41,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:41,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 10:23:41,573 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 10:23:41,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:41,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:41,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 10:23:41,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 10:23:41,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 10:23:41,721 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 10:23:41,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:41,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:41,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:41,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:42,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:42,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:42,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... [2018-09-10 10:23:42,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 10:23:42,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 10:23:42,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 10:23:42,115 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 10:23:42,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 10:23:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 10:23:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 10:23:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:23:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 10:23:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 10:23:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 10:23:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 10:23:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 10:23:47,211 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 10:23:47,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:47 BoogieIcfgContainer [2018-09-10 10:23:47,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 10:23:47,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 10:23:47,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 10:23:47,217 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 10:23:47,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 10:23:40" (1/3) ... [2018-09-10 10:23:47,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5ca724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:47, skipping insertion in model container [2018-09-10 10:23:47,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 10:23:41" (2/3) ... [2018-09-10 10:23:47,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5ca724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 10:23:47, skipping insertion in model container [2018-09-10 10:23:47,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 10:23:47" (3/3) ... [2018-09-10 10:23:47,221 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label04_true-unreach-call.c [2018-09-10 10:23:47,232 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 10:23:47,242 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 10:23:47,299 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 10:23:47,300 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 10:23:47,300 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 10:23:47,301 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 10:23:47,301 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 10:23:47,301 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 10:23:47,301 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 10:23:47,301 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 10:23:47,302 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 10:23:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-09-10 10:23:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-10 10:23:47,355 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:47,356 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:47,357 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1740554548, now seen corresponding path program 1 times [2018-09-10 10:23:47,366 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:47,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:47,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:47,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:47,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:48,407 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:48,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:23:48,407 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:48,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:23:48,427 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:23:48,428 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:48,431 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-09-10 10:23:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:50,541 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-09-10 10:23:50,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:23:50,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-09-10 10:23:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:50,567 INFO L225 Difference]: With dead ends: 848 [2018-09-10 10:23:50,567 INFO L226 Difference]: Without dead ends: 534 [2018-09-10 10:23:50,576 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-09-10 10:23:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-09-10 10:23:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-10 10:23:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-09-10 10:23:50,669 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 205 [2018-09-10 10:23:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:50,674 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-09-10 10:23:50,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:23:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-09-10 10:23:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-10 10:23:50,695 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:50,696 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:50,697 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1550134832, now seen corresponding path program 1 times [2018-09-10 10:23:50,700 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:50,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:50,702 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:51,230 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:23:51,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:23:51,231 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:23:51,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:23:51,233 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:23:51,233 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:23:51,234 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-09-10 10:23:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:23:53,340 INFO L93 Difference]: Finished difference Result 1484 states and 2494 transitions. [2018-09-10 10:23:53,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:23:53,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2018-09-10 10:23:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:23:53,351 INFO L225 Difference]: With dead ends: 1484 [2018-09-10 10:23:53,351 INFO L226 Difference]: Without dead ends: 958 [2018-09-10 10:23:53,358 INFO L604 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 [2018-09-10 10:23:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2018-09-10 10:23:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 952. [2018-09-10 10:23:53,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-09-10 10:23:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1499 transitions. [2018-09-10 10:23:53,415 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1499 transitions. Word has length 218 [2018-09-10 10:23:53,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:23:53,416 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 1499 transitions. [2018-09-10 10:23:53,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:23:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1499 transitions. [2018-09-10 10:23:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-09-10 10:23:53,423 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:23:53,423 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:23:53,423 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:23:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash -477692503, now seen corresponding path program 1 times [2018-09-10 10:23:53,424 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:23:53,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:53,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:53,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:23:53,426 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:23:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:53,770 WARN L175 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:23:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:53,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:53,974 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:23:53,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:53,998 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:54,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:54,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:23:55,026 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 10:23:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:55,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:23:55,534 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:23:55,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:23:55,565 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:23:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:23:56,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:23:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:56,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:23:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:23:56,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:23:56,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-09-10 10:23:56,403 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:23:56,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:23:56,404 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:23:56,405 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:23:56,405 INFO L87 Difference]: Start difference. First operand 952 states and 1499 transitions. Second operand 8 states. [2018-09-10 10:24:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:03,781 INFO L93 Difference]: Finished difference Result 3678 states and 6274 transitions. [2018-09-10 10:24:03,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:24:03,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 229 [2018-09-10 10:24:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:03,821 INFO L225 Difference]: With dead ends: 3678 [2018-09-10 10:24:03,821 INFO L226 Difference]: Without dead ends: 2732 [2018-09-10 10:24:03,831 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 909 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:24:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-10 10:24:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2664. [2018-09-10 10:24:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2018-09-10 10:24:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3877 transitions. [2018-09-10 10:24:03,968 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3877 transitions. Word has length 229 [2018-09-10 10:24:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:03,969 INFO L480 AbstractCegarLoop]: Abstraction has 2664 states and 3877 transitions. [2018-09-10 10:24:03,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:24:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3877 transitions. [2018-09-10 10:24:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-10 10:24:03,984 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:03,984 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:03,984 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash -530119297, now seen corresponding path program 1 times [2018-09-10 10:24:03,985 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:03,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:03,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:03,988 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:04,359 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:04,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 10:24:04,359 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:04,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:04,360 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:04,360 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 10:24:04,361 INFO L87 Difference]: Start difference. First operand 2664 states and 3877 transitions. Second operand 3 states. [2018-09-10 10:24:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:07,318 INFO L93 Difference]: Finished difference Result 7865 states and 11859 transitions. [2018-09-10 10:24:07,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:07,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-09-10 10:24:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:07,362 INFO L225 Difference]: With dead ends: 7865 [2018-09-10 10:24:07,362 INFO L226 Difference]: Without dead ends: 5207 [2018-09-10 10:24:07,381 INFO L604 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 [2018-09-10 10:24:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2018-09-10 10:24:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5190. [2018-09-10 10:24:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5190 states. [2018-09-10 10:24:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5190 states to 5190 states and 7563 transitions. [2018-09-10 10:24:07,546 INFO L78 Accepts]: Start accepts. Automaton has 5190 states and 7563 transitions. Word has length 238 [2018-09-10 10:24:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:07,546 INFO L480 AbstractCegarLoop]: Abstraction has 5190 states and 7563 transitions. [2018-09-10 10:24:07,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5190 states and 7563 transitions. [2018-09-10 10:24:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-10 10:24:07,577 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:07,577 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:07,577 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1055286339, now seen corresponding path program 1 times [2018-09-10 10:24:07,578 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:07,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:07,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:07,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:07,581 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:07,856 WARN L175 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:24:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:07,984 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 10:24:07,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 10:24:07,984 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:07,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:24:07,985 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:24:07,985 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 10:24:07,985 INFO L87 Difference]: Start difference. First operand 5190 states and 7563 transitions. Second operand 6 states. [2018-09-10 10:24:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:10,419 INFO L93 Difference]: Finished difference Result 16298 states and 25550 transitions. [2018-09-10 10:24:10,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:24:10,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 240 [2018-09-10 10:24:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:10,491 INFO L225 Difference]: With dead ends: 16298 [2018-09-10 10:24:10,491 INFO L226 Difference]: Without dead ends: 11114 [2018-09-10 10:24:10,543 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 10:24:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11114 states. [2018-09-10 10:24:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11114 to 10983. [2018-09-10 10:24:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10983 states. [2018-09-10 10:24:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10983 states to 10983 states and 15561 transitions. [2018-09-10 10:24:10,904 INFO L78 Accepts]: Start accepts. Automaton has 10983 states and 15561 transitions. Word has length 240 [2018-09-10 10:24:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:10,905 INFO L480 AbstractCegarLoop]: Abstraction has 10983 states and 15561 transitions. [2018-09-10 10:24:10,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10983 states and 15561 transitions. [2018-09-10 10:24:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-10 10:24:10,948 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:10,948 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:10,949 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1936439626, now seen corresponding path program 1 times [2018-09-10 10:24:10,949 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:10,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:10,951 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:11,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:11,416 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:11,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:11,430 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:11,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:11,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:24:12,248 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 10:24:12,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-09-10 10:24:12,250 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:12,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 10:24:12,251 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 10:24:12,251 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:12,251 INFO L87 Difference]: Start difference. First operand 10983 states and 15561 transitions. Second operand 3 states. [2018-09-10 10:24:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:13,999 INFO L93 Difference]: Finished difference Result 21725 states and 30689 transitions. [2018-09-10 10:24:14,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 10:24:14,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2018-09-10 10:24:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:14,048 INFO L225 Difference]: With dead ends: 21725 [2018-09-10 10:24:14,049 INFO L226 Difference]: Without dead ends: 10748 [2018-09-10 10:24:14,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-10 10:24:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10748 states. [2018-09-10 10:24:14,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10748 to 10734. [2018-09-10 10:24:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10734 states. [2018-09-10 10:24:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10734 states to 10734 states and 14311 transitions. [2018-09-10 10:24:14,470 INFO L78 Accepts]: Start accepts. Automaton has 10734 states and 14311 transitions. Word has length 243 [2018-09-10 10:24:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:14,471 INFO L480 AbstractCegarLoop]: Abstraction has 10734 states and 14311 transitions. [2018-09-10 10:24:14,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 10:24:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 10734 states and 14311 transitions. [2018-09-10 10:24:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-10 10:24:14,523 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:14,524 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:14,524 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1233071546, now seen corresponding path program 1 times [2018-09-10 10:24:14,525 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:14,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:14,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:14,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:14,528 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 130 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-10 10:24:15,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:15,077 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:15,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:15,092 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:15,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-09-10 10:24:15,638 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 114 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-09-10 10:24:16,013 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:24:16,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-09-10 10:24:16,013 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:16,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:24:16,014 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:24:16,015 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-09-10 10:24:16,015 INFO L87 Difference]: Start difference. First operand 10734 states and 14311 transitions. Second operand 5 states. [2018-09-10 10:24:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:19,733 INFO L93 Difference]: Finished difference Result 30848 states and 43667 transitions. [2018-09-10 10:24:19,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 10:24:19,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2018-09-10 10:24:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:19,825 INFO L225 Difference]: With dead ends: 30848 [2018-09-10 10:24:19,825 INFO L226 Difference]: Without dead ends: 20120 [2018-09-10 10:24:19,861 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:24:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2018-09-10 10:24:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 19861. [2018-09-10 10:24:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19861 states. [2018-09-10 10:24:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 26275 transitions. [2018-09-10 10:24:20,657 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 26275 transitions. Word has length 330 [2018-09-10 10:24:20,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:20,658 INFO L480 AbstractCegarLoop]: Abstraction has 19861 states and 26275 transitions. [2018-09-10 10:24:20,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:24:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 26275 transitions. [2018-09-10 10:24:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-10 10:24:20,717 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:20,718 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:20,718 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2134681585, now seen corresponding path program 1 times [2018-09-10 10:24:20,719 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:20,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:20,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:20,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:20,720 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:24:21,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:21,283 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:21,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:21,301 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:21,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:21,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:24:22,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:22,107 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:24:22,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:22,125 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:22,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:23,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 148 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:23,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:23,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-09-10 10:24:23,495 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:23,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:24:23,496 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:24:23,496 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:24:23,497 INFO L87 Difference]: Start difference. First operand 19861 states and 26275 transitions. Second operand 6 states. [2018-09-10 10:24:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:25,716 INFO L93 Difference]: Finished difference Result 38246 states and 50504 transitions. [2018-09-10 10:24:25,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-10 10:24:25,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 339 [2018-09-10 10:24:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:25,770 INFO L225 Difference]: With dead ends: 38246 [2018-09-10 10:24:25,771 INFO L226 Difference]: Without dead ends: 18391 [2018-09-10 10:24:25,800 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 1344 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:24:25,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18391 states. [2018-09-10 10:24:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18391 to 18391. [2018-09-10 10:24:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18391 states. [2018-09-10 10:24:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18391 states to 18391 states and 23505 transitions. [2018-09-10 10:24:26,120 INFO L78 Accepts]: Start accepts. Automaton has 18391 states and 23505 transitions. Word has length 339 [2018-09-10 10:24:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:26,120 INFO L480 AbstractCegarLoop]: Abstraction has 18391 states and 23505 transitions. [2018-09-10 10:24:26,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18391 states and 23505 transitions. [2018-09-10 10:24:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-09-10 10:24:26,162 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:26,163 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:26,163 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash -770166786, now seen corresponding path program 1 times [2018-09-10 10:24:26,164 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:26,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:26,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:26,165 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:26,517 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:24:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:27,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:27,146 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:27,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:27,160 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:27,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:27,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:28,159 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:24:28,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-09-10 10:24:28,159 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:28,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:24:28,160 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:24:28,160 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-09-10 10:24:28,161 INFO L87 Difference]: Start difference. First operand 18391 states and 23505 transitions. Second operand 6 states. [2018-09-10 10:24:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:30,688 INFO L93 Difference]: Finished difference Result 37229 states and 49548 transitions. [2018-09-10 10:24:30,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 10:24:30,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 370 [2018-09-10 10:24:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:30,788 INFO L225 Difference]: With dead ends: 37229 [2018-09-10 10:24:30,788 INFO L226 Difference]: Without dead ends: 18842 [2018-09-10 10:24:30,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 732 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-09-10 10:24:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18842 states. [2018-09-10 10:24:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18842 to 18419. [2018-09-10 10:24:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18419 states. [2018-09-10 10:24:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18419 states to 18419 states and 23460 transitions. [2018-09-10 10:24:31,660 INFO L78 Accepts]: Start accepts. Automaton has 18419 states and 23460 transitions. Word has length 370 [2018-09-10 10:24:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:31,660 INFO L480 AbstractCegarLoop]: Abstraction has 18419 states and 23460 transitions. [2018-09-10 10:24:31,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18419 states and 23460 transitions. [2018-09-10 10:24:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-09-10 10:24:31,703 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:31,703 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 10:24:31,704 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:31,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1846698863, now seen corresponding path program 1 times [2018-09-10 10:24:31,704 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:31,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:31,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:31,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:31,705 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:32,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:32,496 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:32,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:32,507 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:32,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:32,927 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:33,136 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:24:33,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:24:33,137 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:33,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:24:33,138 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:24:33,138 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:24:33,138 INFO L87 Difference]: Start difference. First operand 18419 states and 23460 transitions. Second operand 5 states. [2018-09-10 10:24:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:35,392 INFO L93 Difference]: Finished difference Result 37201 states and 47951 transitions. [2018-09-10 10:24:35,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:24:35,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 372 [2018-09-10 10:24:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:35,451 INFO L225 Difference]: With dead ends: 37201 [2018-09-10 10:24:35,451 INFO L226 Difference]: Without dead ends: 18788 [2018-09-10 10:24:35,490 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 739 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:24:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18788 states. [2018-09-10 10:24:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18788 to 18651. [2018-09-10 10:24:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18651 states. [2018-09-10 10:24:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18651 states to 18651 states and 23410 transitions. [2018-09-10 10:24:35,879 INFO L78 Accepts]: Start accepts. Automaton has 18651 states and 23410 transitions. Word has length 372 [2018-09-10 10:24:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:35,880 INFO L480 AbstractCegarLoop]: Abstraction has 18651 states and 23410 transitions. [2018-09-10 10:24:35,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:24:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18651 states and 23410 transitions. [2018-09-10 10:24:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-09-10 10:24:35,915 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:35,915 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:35,916 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:35,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1991145764, now seen corresponding path program 1 times [2018-09-10 10:24:35,916 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:35,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:35,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:35,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:35,917 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:36,693 WARN L175 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:24:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:37,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:37,324 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:24:37,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:37,333 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:37,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:38,349 WARN L175 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 10:24:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:38,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:38,650 WARN L175 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-10 10:24:38,992 WARN L175 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2018-09-10 10:24:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 180 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:39,640 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:24:39,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 10:24:39,641 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:24:39,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:24:39,642 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:24:39,642 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-09-10 10:24:39,642 INFO L87 Difference]: Start difference. First operand 18651 states and 23410 transitions. Second operand 5 states. [2018-09-10 10:24:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:41,967 INFO L93 Difference]: Finished difference Result 41839 states and 53804 transitions. [2018-09-10 10:24:41,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:24:41,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 391 [2018-09-10 10:24:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:42,054 INFO L225 Difference]: With dead ends: 41839 [2018-09-10 10:24:42,054 INFO L226 Difference]: Without dead ends: 23194 [2018-09-10 10:24:42,093 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-09-10 10:24:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23194 states. [2018-09-10 10:24:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23194 to 22960. [2018-09-10 10:24:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22960 states. [2018-09-10 10:24:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22960 states to 22960 states and 28457 transitions. [2018-09-10 10:24:42,546 INFO L78 Accepts]: Start accepts. Automaton has 22960 states and 28457 transitions. Word has length 391 [2018-09-10 10:24:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:42,547 INFO L480 AbstractCegarLoop]: Abstraction has 22960 states and 28457 transitions. [2018-09-10 10:24:42,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:24:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22960 states and 28457 transitions. [2018-09-10 10:24:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-09-10 10:24:42,591 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:42,591 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:24:42,591 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 61775672, now seen corresponding path program 1 times [2018-09-10 10:24:42,592 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:42,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:42,593 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:43,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:43,180 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:24:43,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:43,190 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:43,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:43,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:44,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:44,194 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:24:44,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:44,209 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:44,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:45,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:45,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:45,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 6] total 15 [2018-09-10 10:24:45,437 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:45,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 10:24:45,438 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 10:24:45,438 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:24:45,439 INFO L87 Difference]: Start difference. First operand 22960 states and 28457 transitions. Second operand 6 states. [2018-09-10 10:24:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:24:48,474 INFO L93 Difference]: Finished difference Result 55991 states and 71967 transitions. [2018-09-10 10:24:48,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 10:24:48,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 393 [2018-09-10 10:24:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:24:48,594 INFO L225 Difference]: With dead ends: 55991 [2018-09-10 10:24:48,595 INFO L226 Difference]: Without dead ends: 33037 [2018-09-10 10:24:48,650 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:24:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33037 states. [2018-09-10 10:24:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33037 to 32496. [2018-09-10 10:24:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32496 states. [2018-09-10 10:24:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32496 states to 32496 states and 39133 transitions. [2018-09-10 10:24:49,697 INFO L78 Accepts]: Start accepts. Automaton has 32496 states and 39133 transitions. Word has length 393 [2018-09-10 10:24:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:24:49,698 INFO L480 AbstractCegarLoop]: Abstraction has 32496 states and 39133 transitions. [2018-09-10 10:24:49,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 10:24:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32496 states and 39133 transitions. [2018-09-10 10:24:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-09-10 10:24:49,756 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:24:49,756 INFO L376 BasicCegarLoop]: trace histogram [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, 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] [2018-09-10 10:24:49,757 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:24:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1077986439, now seen corresponding path program 1 times [2018-09-10 10:24:49,757 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:24:49,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:49,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:49,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:24:49,758 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:24:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:50,165 WARN L175 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 10:24:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 195 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:50,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:50,673 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:24:50,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:50,682 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:51,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:24:51,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:51,589 WARN L175 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2018-09-10 10:24:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 195 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:24:52,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:24:52,061 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:24:52,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:24:52,076 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:24:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:24:52,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:24:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 276 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:53,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:24:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 214 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:24:53,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:24:53,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 11, 8] total 35 [2018-09-10 10:24:53,916 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:24:53,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 10:24:53,918 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 10:24:53,918 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2018-09-10 10:24:53,919 INFO L87 Difference]: Start difference. First operand 32496 states and 39133 transitions. Second operand 16 states. [2018-09-10 10:25:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:03,387 INFO L93 Difference]: Finished difference Result 78335 states and 100287 transitions. [2018-09-10 10:25:03,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-10 10:25:03,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 403 [2018-09-10 10:25:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:03,599 INFO L225 Difference]: With dead ends: 78335 [2018-09-10 10:25:03,599 INFO L226 Difference]: Without dead ends: 45870 [2018-09-10 10:25:03,685 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1694 GetRequests, 1618 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1038, Invalid=4662, Unknown=0, NotChecked=0, Total=5700 [2018-09-10 10:25:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45870 states. [2018-09-10 10:25:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45870 to 43534. [2018-09-10 10:25:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43534 states. [2018-09-10 10:25:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43534 states to 43534 states and 53130 transitions. [2018-09-10 10:25:04,912 INFO L78 Accepts]: Start accepts. Automaton has 43534 states and 53130 transitions. Word has length 403 [2018-09-10 10:25:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:04,913 INFO L480 AbstractCegarLoop]: Abstraction has 43534 states and 53130 transitions. [2018-09-10 10:25:04,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 10:25:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 43534 states and 53130 transitions. [2018-09-10 10:25:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-09-10 10:25:05,012 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:05,013 INFO L376 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, 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] [2018-09-10 10:25:05,013 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1932235547, now seen corresponding path program 1 times [2018-09-10 10:25:05,014 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:05,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:05,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:05,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:05,015 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:25:05,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:05,334 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:25:05,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:05,342 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:05,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:25:05,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:06,327 WARN L175 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:25:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 200 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:25:06,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:06,588 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:25:06,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:06,605 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:07,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 197 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:07,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 285 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:08,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:25:08,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11, 8] total 24 [2018-09-10 10:25:08,125 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:25:08,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 10:25:08,127 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 10:25:08,127 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2018-09-10 10:25:08,127 INFO L87 Difference]: Start difference. First operand 43534 states and 53130 transitions. Second operand 8 states. [2018-09-10 10:25:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:17,153 INFO L93 Difference]: Finished difference Result 96411 states and 125858 transitions. [2018-09-10 10:25:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 10:25:17,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 404 [2018-09-10 10:25:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:17,340 INFO L225 Difference]: With dead ends: 96411 [2018-09-10 10:25:17,340 INFO L226 Difference]: Without dead ends: 52883 [2018-09-10 10:25:17,426 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1627 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2018-09-10 10:25:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52883 states. [2018-09-10 10:25:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52883 to 50767. [2018-09-10 10:25:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50767 states. [2018-09-10 10:25:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50767 states to 50767 states and 60571 transitions. [2018-09-10 10:25:18,840 INFO L78 Accepts]: Start accepts. Automaton has 50767 states and 60571 transitions. Word has length 404 [2018-09-10 10:25:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:18,840 INFO L480 AbstractCegarLoop]: Abstraction has 50767 states and 60571 transitions. [2018-09-10 10:25:18,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 10:25:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50767 states and 60571 transitions. [2018-09-10 10:25:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-09-10 10:25:18,972 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:18,972 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:25:18,972 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2041482561, now seen corresponding path program 1 times [2018-09-10 10:25:18,973 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:18,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:18,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:18,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:18,974 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:19,515 WARN L175 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-09-10 10:25:19,886 WARN L175 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-10 10:25:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 222 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 10:25:20,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:20,847 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:25:20,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:20,856 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:21,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-10 10:25:21,427 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 224 proven. 89 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-10 10:25:21,749 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 10:25:21,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 5] total 15 [2018-09-10 10:25:21,749 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 10:25:21,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 10:25:21,750 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 10:25:21,750 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-09-10 10:25:21,750 INFO L87 Difference]: Start difference. First operand 50767 states and 60571 transitions. Second operand 5 states. [2018-09-10 10:25:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:23,992 INFO L93 Difference]: Finished difference Result 125252 states and 154634 transitions. [2018-09-10 10:25:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 10:25:23,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 432 [2018-09-10 10:25:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:24,267 INFO L225 Difference]: With dead ends: 125252 [2018-09-10 10:25:24,268 INFO L226 Difference]: Without dead ends: 80653 [2018-09-10 10:25:24,359 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 856 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-09-10 10:25:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80653 states. [2018-09-10 10:25:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80653 to 79315. [2018-09-10 10:25:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79315 states. [2018-09-10 10:25:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79315 states to 79315 states and 94908 transitions. [2018-09-10 10:25:26,010 INFO L78 Accepts]: Start accepts. Automaton has 79315 states and 94908 transitions. Word has length 432 [2018-09-10 10:25:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:26,011 INFO L480 AbstractCegarLoop]: Abstraction has 79315 states and 94908 transitions. [2018-09-10 10:25:26,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 10:25:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 79315 states and 94908 transitions. [2018-09-10 10:25:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-09-10 10:25:26,137 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:26,137 INFO L376 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 10:25:26,137 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1771213995, now seen corresponding path program 1 times [2018-09-10 10:25:26,138 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:26,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:26,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:26,139 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 264 proven. 86 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-10 10:25:26,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:26,749 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:25:26,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:26,760 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:27,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:25:27,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:25:28,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:28,075 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:25:28,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:28,091 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:28,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 326 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:25:29,043 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-09-10 10:25:29,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:25:29,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 12 [2018-09-10 10:25:29,192 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:25:29,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:25:29,193 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:25:29,194 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-09-10 10:25:29,194 INFO L87 Difference]: Start difference. First operand 79315 states and 94908 transitions. Second operand 9 states. [2018-09-10 10:25:48,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:25:48,879 INFO L93 Difference]: Finished difference Result 306092 states and 437969 transitions. [2018-09-10 10:25:48,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-10 10:25:48,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 455 [2018-09-10 10:25:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:25:49,828 INFO L225 Difference]: With dead ends: 306092 [2018-09-10 10:25:49,829 INFO L226 Difference]: Without dead ends: 207604 [2018-09-10 10:25:50,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1886 GetRequests, 1843 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2018-09-10 10:25:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207604 states. [2018-09-10 10:25:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207604 to 192156. [2018-09-10 10:25:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192156 states. [2018-09-10 10:25:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192156 states to 192156 states and 224635 transitions. [2018-09-10 10:25:56,925 INFO L78 Accepts]: Start accepts. Automaton has 192156 states and 224635 transitions. Word has length 455 [2018-09-10 10:25:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:25:56,926 INFO L480 AbstractCegarLoop]: Abstraction has 192156 states and 224635 transitions. [2018-09-10 10:25:56,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:25:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 192156 states and 224635 transitions. [2018-09-10 10:25:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2018-09-10 10:25:57,140 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:25:57,141 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:25:57,141 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:25:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1196051666, now seen corresponding path program 1 times [2018-09-10 10:25:57,141 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:25:57,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:57,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:57,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:25:57,143 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:25:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 270 proven. 8 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-09-10 10:25:57,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:57,863 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:25:57,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:57,871 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:25:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:25:58,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:25:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 288 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-09-10 10:25:58,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:25:58,821 WARN L175 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-10 10:25:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 268 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-09-10 10:25:59,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:25:59,279 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 10:25:59,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:25:59,295 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:00,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 343 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:26:01,230 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:01,385 WARN L175 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-10 10:26:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 362 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-09-10 10:26:01,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:26:01,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8, 11, 8] total 30 [2018-09-10 10:26:01,846 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:26:01,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-10 10:26:01,847 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-10 10:26:01,847 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2018-09-10 10:26:01,848 INFO L87 Difference]: Start difference. First operand 192156 states and 224635 transitions. Second operand 11 states. [2018-09-10 10:26:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:19,559 INFO L93 Difference]: Finished difference Result 377142 states and 461837 transitions. [2018-09-10 10:26:19,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-10 10:26:19,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 460 [2018-09-10 10:26:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:20,315 INFO L225 Difference]: With dead ends: 377142 [2018-09-10 10:26:20,316 INFO L226 Difference]: Without dead ends: 188948 [2018-09-10 10:26:20,686 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1858 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=793, Invalid=5059, Unknown=0, NotChecked=0, Total=5852 [2018-09-10 10:26:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188948 states. [2018-09-10 10:26:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188948 to 178589. [2018-09-10 10:26:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178589 states. [2018-09-10 10:26:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178589 states to 178589 states and 203468 transitions. [2018-09-10 10:26:31,004 INFO L78 Accepts]: Start accepts. Automaton has 178589 states and 203468 transitions. Word has length 460 [2018-09-10 10:26:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:26:31,004 INFO L480 AbstractCegarLoop]: Abstraction has 178589 states and 203468 transitions. [2018-09-10 10:26:31,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-10 10:26:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 178589 states and 203468 transitions. [2018-09-10 10:26:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-10 10:26:31,197 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:26:31,197 INFO L376 BasicCegarLoop]: trace histogram [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, 3, 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] [2018-09-10 10:26:31,197 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:26:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1882917872, now seen corresponding path program 1 times [2018-09-10 10:26:31,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:26:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:31,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:26:31,198 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:26:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 330 proven. 85 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-09-10 10:26:31,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:31,715 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 10:26:31,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:31,723 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:32,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 412 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:26:32,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 339 proven. 87 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-10 10:26:33,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:26:33,263 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 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 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:26:33,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:26:33,285 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:26:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:26:34,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:26:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 412 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:26:34,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:26:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 339 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-09-10 10:26:34,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:26:34,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 5] total 18 [2018-09-10 10:26:34,573 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:26:34,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 10:26:34,574 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 10:26:34,574 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-09-10 10:26:34,574 INFO L87 Difference]: Start difference. First operand 178589 states and 203468 transitions. Second operand 9 states. [2018-09-10 10:26:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 10:26:58,318 INFO L93 Difference]: Finished difference Result 618849 states and 751135 transitions. [2018-09-10 10:26:58,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 10:26:58,318 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 462 [2018-09-10 10:26:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 10:26:59,951 INFO L225 Difference]: With dead ends: 618849 [2018-09-10 10:26:59,951 INFO L226 Difference]: Without dead ends: 381219 [2018-09-10 10:27:00,504 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1906 GetRequests, 1861 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2018-09-10 10:27:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381219 states. [2018-09-10 10:27:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381219 to 339180. [2018-09-10 10:27:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339180 states. [2018-09-10 10:27:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339180 states to 339180 states and 369118 transitions. [2018-09-10 10:27:09,018 INFO L78 Accepts]: Start accepts. Automaton has 339180 states and 369118 transitions. Word has length 462 [2018-09-10 10:27:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 10:27:09,019 INFO L480 AbstractCegarLoop]: Abstraction has 339180 states and 369118 transitions. [2018-09-10 10:27:09,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 10:27:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 339180 states and 369118 transitions. [2018-09-10 10:27:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2018-09-10 10:27:09,206 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 10:27:09,206 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 10:27:09,207 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 10:27:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash -655432280, now seen corresponding path program 1 times [2018-09-10 10:27:09,207 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 10:27:09,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:09,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:09,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 10:27:09,208 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 10:27:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 462 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-10 10:27:10,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:10,025 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 10:27:10,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:10,033 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:11,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 451 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:27:11,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 451 proven. 2 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-09-10 10:27:12,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 10:27:12,066 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 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 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 10:27:12,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 10:27:12,082 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 10:27:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 10:27:12,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 10:27:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 366 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 10:27:13,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 10:27:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 460 proven. 8 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-09-10 10:27:13,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 10:27:13,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6, 10, 8] total 20 [2018-09-10 10:27:13,513 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 10:27:13,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-10 10:27:13,514 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-10 10:27:13,515 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-10 10:27:13,515 INFO L87 Difference]: Start difference. First operand 339180 states and 369118 transitions. Second operand 12 states. Received shutdown request... [2018-09-10 10:27:15,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 10:27:15,458 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 10:27:15,464 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 10:27:15,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 10:27:15 BoogieIcfgContainer [2018-09-10 10:27:15,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 10:27:15,465 INFO L168 Benchmark]: Toolchain (without parser) took 215058.60 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,468 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-09-10 10:27:15,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1160.56 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,470 INFO L168 Benchmark]: Boogie Procedure Inliner took 147.10 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,471 INFO L168 Benchmark]: Boogie Preprocessor took 394.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -927.3 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,471 INFO L168 Benchmark]: RCFGBuilder took 5097.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 288.3 MB). Peak memory consumption was 288.3 MB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,472 INFO L168 Benchmark]: TraceAbstraction took 208251.98 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -271.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-09-10 10:27:15,476 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1160.56 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 147.10 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 394.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -927.3 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5097.01 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 288.3 MB). Peak memory consumption was 288.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208251.98 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.3 GB). Free memory was 1.9 GB in the beginning and 2.2 GB in the end (delta: -271.9 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1629]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1629). Cancelled while BasicCegarLoop was constructing difference of abstraction (339180states) and FLOYD_HOARE automaton (currently 12 states, 12 states before enhancement), while ReachableStatesComputation was computing reachable states (949 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 208.1s OverallTime, 19 OverallIterations, 5 TraceHistogramMax, 125.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4218 SDtfs, 26311 SDslu, 5719 SDs, 0 SdLazy, 49902 SolverSat, 7868 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19302 GetRequests, 18837 SyntacticMatches, 29 SemanticMatches, 436 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 20.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=339180occurred in iteration=18, 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: 34.8s AutomataMinimizationTime, 18 MinimizatonAttempts, 75468 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.9s SsaConstructionTime, 12.1s SatisfiabilityAnalysisTime, 28.7s InterpolantComputationTime, 16082 NumberOfCodeBlocks, 16082 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 25423 ConstructedInterpolants, 0 QuantifiedInterpolants, 27398376 SizeOfPredicates, 97 NumberOfNonLiveVariables, 32510 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 67 InterpolantComputations, 11 PerfectInterpolantSequences, 16369/18289 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/Problem03_label04_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_10-27-15-489.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem03_label04_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_10-27-15-489.csv Completed graceful shutdown