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/Problem15_label05_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:06:35,558 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:06:35,560 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:06:35,572 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:06:35,573 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:06:35,574 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:06:35,575 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:06:35,577 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:06:35,578 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:06:35,579 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:06:35,580 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:06:35,580 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:06:35,581 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:06:35,582 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:06:35,586 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:06:35,586 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:06:35,587 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:06:35,598 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:06:35,600 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:06:35,605 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:06:35,606 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:06:35,607 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:06:35,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-10 12:06:35,611 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-10 12:06:35,612 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-10 12:06:35,616 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-10 12:06:35,617 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-10 12:06:35,618 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-10 12:06:35,618 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-10 12:06:35,622 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-10 12:06:35,623 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-10 12:06:35,624 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-10 12:06:35,624 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:06:35,624 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:06:35,626 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:06:35,627 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:06:35,627 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:06:35,651 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:06:35,652 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:06:35,653 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:06:35,654 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:06:35,654 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:06:35,654 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:06:35,654 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:06:35,655 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:06:35,655 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:06:35,655 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:06:35,655 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:06:35,656 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:06:35,656 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:06:35,657 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:06:35,657 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:06:35,657 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:06:35,657 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:06:35,657 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:06:35,658 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:06:35,658 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:06:35,658 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:06:35,658 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:06:35,658 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:06:35,659 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:06:35,659 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:06:35,659 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:06:35,659 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:06:35,659 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:06:35,660 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:06:35,660 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:06:35,660 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:06:35,660 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:06:35,661 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:06:35,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:06:35,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:06:35,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:06:35,722 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:06:35,723 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:06:35,724 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label05_true-unreach-call.c [2018-09-10 12:06:35,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3bb6702/4af93fd27e5c4a24bc35be0bb2e37c37/FLAG211f30160 [2018-09-10 12:06:36,398 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:06:36,399 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label05_true-unreach-call.c [2018-09-10 12:06:36,425 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3bb6702/4af93fd27e5c4a24bc35be0bb2e37c37/FLAG211f30160 [2018-09-10 12:06:36,442 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3bb6702/4af93fd27e5c4a24bc35be0bb2e37c37 [2018-09-10 12:06:36,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:06:36,456 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:06:36,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:06:36,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:06:36,465 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:06:36,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:06:36" (1/1) ... [2018-09-10 12:06:36,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da1ab21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:36, skipping insertion in model container [2018-09-10 12:06:36,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:06:36" (1/1) ... [2018-09-10 12:06:36,760 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:06:37,339 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:06:37,357 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:06:37,682 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:06:37,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37 WrapperNode [2018-09-10 12:06:37,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:06:37,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:06:37,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:06:37,829 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:06:37,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:37,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:06:38,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:06:38,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:06:38,040 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:06:38,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (1/1) ... [2018-09-10 12:06:38,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:06:38,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:06:38,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:06:38,749 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:06:38,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (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 12:06:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:06:38,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:06:38,827 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 12:06:38,828 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 12:06:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:06:38,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:06:38,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:06:38,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:06:38,829 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:06:38,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:06:48,490 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:06:48,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:06:48 BoogieIcfgContainer [2018-09-10 12:06:48,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:06:48,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:06:48,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:06:48,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:06:48,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:06:36" (1/3) ... [2018-09-10 12:06:48,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caed35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:06:48, skipping insertion in model container [2018-09-10 12:06:48,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:06:37" (2/3) ... [2018-09-10 12:06:48,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@caed35b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:06:48, skipping insertion in model container [2018-09-10 12:06:48,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:06:48" (3/3) ... [2018-09-10 12:06:48,500 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label05_true-unreach-call.c [2018-09-10 12:06:48,510 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:06:48,520 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:06:48,577 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:06:48,577 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:06:48,578 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:06:48,578 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:06:48,578 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:06:48,578 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:06:48,578 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:06:48,579 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:06:48,579 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:06:48,616 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-10 12:06:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-10 12:06:48,628 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:48,629 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] [2018-09-10 12:06:48,630 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 12:06:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash 286027249, now seen corresponding path program 1 times [2018-09-10 12:06:48,639 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:48,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:48,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:48,692 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:49,236 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 12:06:49,239 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:06:49,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:06:49,240 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:06:49,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:06:49,262 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:06:49,262 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:06:49,265 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-09-10 12:06:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:06:57,574 INFO L93 Difference]: Finished difference Result 1514 states and 2777 transitions. [2018-09-10 12:06:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:06:57,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2018-09-10 12:06:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:06:57,605 INFO L225 Difference]: With dead ends: 1514 [2018-09-10 12:06:57,605 INFO L226 Difference]: Without dead ends: 1070 [2018-09-10 12:06:57,619 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:06:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2018-09-10 12:06:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1068. [2018-09-10 12:06:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-09-10 12:06:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1675 transitions. [2018-09-10 12:06:57,734 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1675 transitions. Word has length 71 [2018-09-10 12:06:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:06:57,735 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1675 transitions. [2018-09-10 12:06:57,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:06:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1675 transitions. [2018-09-10 12:06:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-10 12:06:57,745 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:06:57,745 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:06:57,746 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 12:06:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -373993915, now seen corresponding path program 1 times [2018-09-10 12:06:57,746 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:06:57,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:57,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:06:57,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:06:57,748 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:06:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:06:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:06:58,020 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:06:58,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-10 12:06:58,021 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:06:58,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:06:58,023 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:06:58,023 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:06:58,024 INFO L87 Difference]: Start difference. First operand 1068 states and 1675 transitions. Second operand 4 states. [2018-09-10 12:07:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:04,290 INFO L93 Difference]: Finished difference Result 3988 states and 6459 transitions. [2018-09-10 12:07:04,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:07:04,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2018-09-10 12:07:04,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:04,319 INFO L225 Difference]: With dead ends: 3988 [2018-09-10 12:07:04,319 INFO L226 Difference]: Without dead ends: 2926 [2018-09-10 12:07:04,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:07:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2018-09-10 12:07:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2613. [2018-09-10 12:07:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2613 states. [2018-09-10 12:07:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3832 transitions. [2018-09-10 12:07:04,443 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3832 transitions. Word has length 141 [2018-09-10 12:07:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:04,444 INFO L480 AbstractCegarLoop]: Abstraction has 2613 states and 3832 transitions. [2018-09-10 12:07:04,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:07:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3832 transitions. [2018-09-10 12:07:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-09-10 12:07:04,462 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:04,463 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:04,463 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 12:07:04,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1372334181, now seen corresponding path program 1 times [2018-09-10 12:07:04,464 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:04,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:04,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:04,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:04,465 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 200 proven. 237 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-10 12:07:05,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:05,261 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 12:07:05,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:05,271 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:05,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-09-10 12:07:06,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 200 proven. 166 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-10 12:07:07,297 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:07:07,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:07:07,298 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:07:07,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:07:07,299 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:07:07,300 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:07:07,300 INFO L87 Difference]: Start difference. First operand 2613 states and 3832 transitions. Second operand 5 states. [2018-09-10 12:07:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:14,819 INFO L93 Difference]: Finished difference Result 7822 states and 11690 transitions. [2018-09-10 12:07:14,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:07:14,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 347 [2018-09-10 12:07:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:14,863 INFO L225 Difference]: With dead ends: 7822 [2018-09-10 12:07:14,863 INFO L226 Difference]: Without dead ends: 5215 [2018-09-10 12:07:14,880 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 691 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:07:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2018-09-10 12:07:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 5177. [2018-09-10 12:07:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5177 states. [2018-09-10 12:07:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 7065 transitions. [2018-09-10 12:07:15,064 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 7065 transitions. Word has length 347 [2018-09-10 12:07:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:15,065 INFO L480 AbstractCegarLoop]: Abstraction has 5177 states and 7065 transitions. [2018-09-10 12:07:15,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:07:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 7065 transitions. [2018-09-10 12:07:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-09-10 12:07:15,078 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:15,078 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:07:15,078 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 12:07:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash 277829512, now seen corresponding path program 1 times [2018-09-10 12:07:15,079 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:15,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:15,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:15,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:15,081 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:07:16,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:16,055 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:16,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:16,076 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:16,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:07:16,506 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:16,662 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-10 12:07:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:07:17,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:17,039 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:17,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:17,069 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:17,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:07:17,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:07:17,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:17,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:07:17,870 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:17,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:07:17,871 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:07:17,872 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:07:17,872 INFO L87 Difference]: Start difference. First operand 5177 states and 7065 transitions. Second operand 9 states. [2018-09-10 12:07:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:29,797 INFO L93 Difference]: Finished difference Result 15917 states and 23820 transitions. [2018-09-10 12:07:29,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-10 12:07:29,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 372 [2018-09-10 12:07:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:29,867 INFO L225 Difference]: With dead ends: 15917 [2018-09-10 12:07:29,867 INFO L226 Difference]: Without dead ends: 10746 [2018-09-10 12:07:29,931 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1486 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:07:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10746 states. [2018-09-10 12:07:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10746 to 10697. [2018-09-10 12:07:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10697 states. [2018-09-10 12:07:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 14216 transitions. [2018-09-10 12:07:30,280 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 14216 transitions. Word has length 372 [2018-09-10 12:07:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:30,281 INFO L480 AbstractCegarLoop]: Abstraction has 10697 states and 14216 transitions. [2018-09-10 12:07:30,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:07:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 14216 transitions. [2018-09-10 12:07:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-09-10 12:07:30,312 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:30,313 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:07:30,313 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 12:07:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2031414625, now seen corresponding path program 1 times [2018-09-10 12:07:30,314 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:30,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:30,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:30,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:30,315 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:07:31,054 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:07:31,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:07:31,055 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:07:31,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:07:31,057 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:07:31,057 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:07:31,057 INFO L87 Difference]: Start difference. First operand 10697 states and 14216 transitions. Second operand 3 states. [2018-09-10 12:07:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:35,323 INFO L93 Difference]: Finished difference Result 24220 states and 33899 transitions. [2018-09-10 12:07:35,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:07:35,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 513 [2018-09-10 12:07:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:35,416 INFO L225 Difference]: With dead ends: 24220 [2018-09-10 12:07:35,417 INFO L226 Difference]: Without dead ends: 13529 [2018-09-10 12:07:35,490 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:07:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13529 states. [2018-09-10 12:07:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13529 to 13524. [2018-09-10 12:07:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13524 states. [2018-09-10 12:07:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13524 states to 13524 states and 18271 transitions. [2018-09-10 12:07:35,864 INFO L78 Accepts]: Start accepts. Automaton has 13524 states and 18271 transitions. Word has length 513 [2018-09-10 12:07:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:35,865 INFO L480 AbstractCegarLoop]: Abstraction has 13524 states and 18271 transitions. [2018-09-10 12:07:35,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:07:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 13524 states and 18271 transitions. [2018-09-10 12:07:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-09-10 12:07:35,909 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:35,909 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:07:35,910 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 12:07:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash 120638676, now seen corresponding path program 1 times [2018-09-10 12:07:35,910 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:35,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:35,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:35,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:35,912 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:07:36,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:36,765 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 12:07:36,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:36,778 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:36,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:07:37,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:07:37,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:37,619 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 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:07:37,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:37,635 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:38,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:07:38,550 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:38,703 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-09-10 12:07:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:07:39,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:07:39,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-09-10 12:07:39,404 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:07:39,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:07:39,406 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:07:39,406 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:07:39,407 INFO L87 Difference]: Start difference. First operand 13524 states and 18271 transitions. Second operand 6 states. [2018-09-10 12:07:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:51,910 INFO L93 Difference]: Finished difference Result 36275 states and 50569 transitions. [2018-09-10 12:07:51,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:07:51,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 580 [2018-09-10 12:07:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:52,014 INFO L225 Difference]: With dead ends: 36275 [2018-09-10 12:07:52,014 INFO L226 Difference]: Without dead ends: 22757 [2018-09-10 12:07:52,083 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2333 GetRequests, 2317 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:07:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22757 states. [2018-09-10 12:07:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22757 to 22715. [2018-09-10 12:07:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22715 states. [2018-09-10 12:07:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22715 states to 22715 states and 29383 transitions. [2018-09-10 12:07:52,766 INFO L78 Accepts]: Start accepts. Automaton has 22715 states and 29383 transitions. Word has length 580 [2018-09-10 12:07:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:52,767 INFO L480 AbstractCegarLoop]: Abstraction has 22715 states and 29383 transitions. [2018-09-10 12:07:52,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:07:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22715 states and 29383 transitions. [2018-09-10 12:07:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2018-09-10 12:07:52,847 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:52,847 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 12:07:52,847 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 12:07:52,848 INFO L82 PathProgramCache]: Analyzing trace with hash -375382701, now seen corresponding path program 1 times [2018-09-10 12:07:52,848 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:52,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:52,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:52,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:52,849 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:07:53,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:07:53,330 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:07:53,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:53,341 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:07:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:07:53,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:07:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2018-09-10 12:07:53,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:07:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 272 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:07:54,380 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:07:54,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2018-09-10 12:07:54,381 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:07:54,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:07:54,383 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:07:54,383 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:07:54,384 INFO L87 Difference]: Start difference. First operand 22715 states and 29383 transitions. Second operand 3 states. [2018-09-10 12:07:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:07:58,776 INFO L93 Difference]: Finished difference Result 45733 states and 59215 transitions. [2018-09-10 12:07:58,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:07:58,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 614 [2018-09-10 12:07:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:07:58,872 INFO L225 Difference]: With dead ends: 45733 [2018-09-10 12:07:58,872 INFO L226 Difference]: Without dead ends: 23024 [2018-09-10 12:07:58,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1228 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-10 12:07:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23024 states. [2018-09-10 12:07:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23024 to 22711. [2018-09-10 12:07:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22711 states. [2018-09-10 12:07:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22711 states to 22711 states and 29354 transitions. [2018-09-10 12:07:59,528 INFO L78 Accepts]: Start accepts. Automaton has 22711 states and 29354 transitions. Word has length 614 [2018-09-10 12:07:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:07:59,529 INFO L480 AbstractCegarLoop]: Abstraction has 22711 states and 29354 transitions. [2018-09-10 12:07:59,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:07:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22711 states and 29354 transitions. [2018-09-10 12:07:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2018-09-10 12:07:59,598 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:07:59,599 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:07:59,599 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 12:07:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1489876569, now seen corresponding path program 1 times [2018-09-10 12:07:59,600 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:07:59,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:59,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:07:59,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:07:59,601 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:07:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:08:00,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:00,591 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 12:08:00,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:00,609 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:00,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:08:01,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:08:01,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:01,670 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:01,688 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:02,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:08:02,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-09-10 12:08:02,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:08:02,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:08:02,693 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:08:02,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:08:02,695 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:08:02,695 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:08:02,695 INFO L87 Difference]: Start difference. First operand 22711 states and 29354 transitions. Second operand 9 states. [2018-09-10 12:08:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:13,501 INFO L93 Difference]: Finished difference Result 49232 states and 65851 transitions. [2018-09-10 12:08:13,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:08:13,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 623 [2018-09-10 12:08:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:13,606 INFO L225 Difference]: With dead ends: 49232 [2018-09-10 12:08:13,606 INFO L226 Difference]: Without dead ends: 26527 [2018-09-10 12:08:13,699 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2510 GetRequests, 2490 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:08:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26527 states. [2018-09-10 12:08:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26527 to 26165. [2018-09-10 12:08:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26165 states. [2018-09-10 12:08:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26165 states to 26165 states and 33450 transitions. [2018-09-10 12:08:14,265 INFO L78 Accepts]: Start accepts. Automaton has 26165 states and 33450 transitions. Word has length 623 [2018-09-10 12:08:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:14,266 INFO L480 AbstractCegarLoop]: Abstraction has 26165 states and 33450 transitions. [2018-09-10 12:08:14,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:08:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 26165 states and 33450 transitions. [2018-09-10 12:08:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2018-09-10 12:08:14,312 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:14,313 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 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] [2018-09-10 12:08:14,313 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 12:08:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1148462623, now seen corresponding path program 1 times [2018-09-10 12:08:14,314 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:14,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:14,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:14,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:14,317 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:08:15,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:15,297 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 12:08:15,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:15,307 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:15,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:08:15,965 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:08:16,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:16,276 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:16,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:16,293 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:16,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:08:16,924 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-10 12:08:17,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:08:17,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:08:17,220 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:08:17,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:08:17,221 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:08:17,222 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:08:17,222 INFO L87 Difference]: Start difference. First operand 26165 states and 33450 transitions. Second operand 9 states. [2018-09-10 12:08:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:26,508 INFO L93 Difference]: Finished difference Result 52201 states and 65941 transitions. [2018-09-10 12:08:26,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-10 12:08:26,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 633 [2018-09-10 12:08:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:26,599 INFO L225 Difference]: With dead ends: 52201 [2018-09-10 12:08:26,600 INFO L226 Difference]: Without dead ends: 26042 [2018-09-10 12:08:26,690 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2552 GetRequests, 2531 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:08:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26042 states. [2018-09-10 12:08:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26042 to 25332. [2018-09-10 12:08:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25332 states. [2018-09-10 12:08:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25332 states to 25332 states and 28550 transitions. [2018-09-10 12:08:27,077 INFO L78 Accepts]: Start accepts. Automaton has 25332 states and 28550 transitions. Word has length 633 [2018-09-10 12:08:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:27,078 INFO L480 AbstractCegarLoop]: Abstraction has 25332 states and 28550 transitions. [2018-09-10 12:08:27,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:08:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 25332 states and 28550 transitions. [2018-09-10 12:08:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2018-09-10 12:08:27,103 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:27,104 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:08:27,104 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 12:08:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230259, now seen corresponding path program 1 times [2018-09-10 12:08:27,105 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:27,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:27,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:27,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:27,106 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 525 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-09-10 12:08:27,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:27,784 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:08:27,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:27,793 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:28,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:28,510 WARN L175 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-09-10 12:08:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 753 proven. 2 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-10 12:08:28,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 525 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-09-10 12:08:29,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:29,397 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:08:29,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:29,414 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:29,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 753 proven. 2 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-09-10 12:08:30,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 525 proven. 100 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-09-10 12:08:30,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:08:30,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 11 [2018-09-10 12:08:30,606 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:08:30,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-10 12:08:30,607 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-10 12:08:30,608 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:08:30,608 INFO L87 Difference]: Start difference. First operand 25332 states and 28550 transitions. Second operand 8 states. [2018-09-10 12:08:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:43,826 INFO L93 Difference]: Finished difference Result 76827 states and 91681 transitions. [2018-09-10 12:08:43,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:08:43,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 635 [2018-09-10 12:08:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:43,953 INFO L225 Difference]: With dead ends: 76827 [2018-09-10 12:08:43,954 INFO L226 Difference]: Without dead ends: 51561 [2018-09-10 12:08:44,012 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2552 GetRequests, 2535 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:08:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51561 states. [2018-09-10 12:08:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51561 to 48190. [2018-09-10 12:08:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48190 states. [2018-09-10 12:08:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48190 states to 48190 states and 53527 transitions. [2018-09-10 12:08:44,716 INFO L78 Accepts]: Start accepts. Automaton has 48190 states and 53527 transitions. Word has length 635 [2018-09-10 12:08:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:44,717 INFO L480 AbstractCegarLoop]: Abstraction has 48190 states and 53527 transitions. [2018-09-10 12:08:44,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-10 12:08:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 48190 states and 53527 transitions. [2018-09-10 12:08:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2018-09-10 12:08:44,765 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:44,766 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:08:44,766 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 12:08:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash -997921514, now seen corresponding path program 1 times [2018-09-10 12:08:44,766 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:44,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:44,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:44,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:44,767 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:45,341 WARN L175 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-09-10 12:08:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 256 proven. 387 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:08:45,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:08:45,767 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:08:45,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:45,774 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:08:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:08:46,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:08:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 463 proven. 0 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2018-09-10 12:08:46,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:08:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 256 proven. 387 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:08:48,325 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:08:48,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:08:48,325 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:08:48,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:08:48,326 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:08:48,326 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:08:48,326 INFO L87 Difference]: Start difference. First operand 48190 states and 53527 transitions. Second operand 5 states. [2018-09-10 12:08:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:08:57,633 INFO L93 Difference]: Finished difference Result 99680 states and 110716 transitions. [2018-09-10 12:08:57,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:08:57,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 674 [2018-09-10 12:08:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:08:57,748 INFO L225 Difference]: With dead ends: 99680 [2018-09-10 12:08:57,749 INFO L226 Difference]: Without dead ends: 51501 [2018-09-10 12:08:57,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1343 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:08:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51501 states. [2018-09-10 12:08:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51501 to 49713. [2018-09-10 12:08:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49713 states. [2018-09-10 12:08:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49713 states to 49713 states and 55312 transitions. [2018-09-10 12:08:58,463 INFO L78 Accepts]: Start accepts. Automaton has 49713 states and 55312 transitions. Word has length 674 [2018-09-10 12:08:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:08:58,463 INFO L480 AbstractCegarLoop]: Abstraction has 49713 states and 55312 transitions. [2018-09-10 12:08:58,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:08:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49713 states and 55312 transitions. [2018-09-10 12:08:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2018-09-10 12:08:58,510 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:08:58,511 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:08:58,511 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 12:08:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash 76244223, now seen corresponding path program 1 times [2018-09-10 12:08:58,512 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:08:58,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:58,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:08:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:08:58,513 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:08:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 433 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:09:00,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:00,094 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 12:09:00,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:00,107 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:00,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-09-10 12:09:00,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 433 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:09:01,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:01,091 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 12:09:01,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:01,106 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:01,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 759 proven. 2 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-09-10 12:09:02,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 433 proven. 229 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:09:02,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:09:02,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:09:02,546 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:09:02,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:09:02,549 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:09:02,549 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:09:02,550 INFO L87 Difference]: Start difference. First operand 49713 states and 55312 transitions. Second operand 9 states. [2018-09-10 12:09:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:09:11,359 INFO L93 Difference]: Finished difference Result 97123 states and 108993 transitions. [2018-09-10 12:09:11,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-10 12:09:11,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 748 [2018-09-10 12:09:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:09:11,487 INFO L225 Difference]: With dead ends: 97123 [2018-09-10 12:09:11,487 INFO L226 Difference]: Without dead ends: 49273 [2018-09-10 12:09:11,568 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3022 GetRequests, 2996 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:09:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49273 states. [2018-09-10 12:09:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49273 to 48895. [2018-09-10 12:09:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48895 states. [2018-09-10 12:09:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48895 states to 48895 states and 53630 transitions. [2018-09-10 12:09:12,481 INFO L78 Accepts]: Start accepts. Automaton has 48895 states and 53630 transitions. Word has length 748 [2018-09-10 12:09:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:09:12,482 INFO L480 AbstractCegarLoop]: Abstraction has 48895 states and 53630 transitions. [2018-09-10 12:09:12,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:09:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 48895 states and 53630 transitions. [2018-09-10 12:09:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2018-09-10 12:09:12,534 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:09:12,535 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:09:12,535 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 12:09:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1593424799, now seen corresponding path program 1 times [2018-09-10 12:09:12,536 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:09:12,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:12,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:12,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:12,539 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:09:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:09:13,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:13,681 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 12:09:13,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:13,698 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:13,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:09:14,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:09:15,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:15,162 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:09:15,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:15,183 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:15,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:09:16,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-10 12:09:16,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:09:16,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-09-10 12:09:16,604 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:09:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-10 12:09:16,606 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-10 12:09:16,606 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-09-10 12:09:16,606 INFO L87 Difference]: Start difference. First operand 48895 states and 53630 transitions. Second operand 7 states. [2018-09-10 12:09:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:09:26,136 INFO L93 Difference]: Finished difference Result 105471 states and 115725 transitions. [2018-09-10 12:09:26,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-10 12:09:26,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 760 [2018-09-10 12:09:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:09:26,264 INFO L225 Difference]: With dead ends: 105471 [2018-09-10 12:09:26,264 INFO L226 Difference]: Without dead ends: 56890 [2018-09-10 12:09:26,325 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3058 GetRequests, 3039 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:09:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56890 states. [2018-09-10 12:09:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56890 to 56305. [2018-09-10 12:09:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56305 states. [2018-09-10 12:09:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56305 states to 56305 states and 61445 transitions. [2018-09-10 12:09:26,944 INFO L78 Accepts]: Start accepts. Automaton has 56305 states and 61445 transitions. Word has length 760 [2018-09-10 12:09:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:09:26,945 INFO L480 AbstractCegarLoop]: Abstraction has 56305 states and 61445 transitions. [2018-09-10 12:09:26,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-10 12:09:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 56305 states and 61445 transitions. [2018-09-10 12:09:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2018-09-10 12:09:26,978 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:09:26,978 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:09:26,979 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 12:09:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash 25179072, now seen corresponding path program 1 times [2018-09-10 12:09:26,979 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:09:26,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:26,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:26,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:09:26,980 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:09:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 304 proven. 791 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-09-10 12:09:29,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:29,600 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:09:29,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:29,609 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:29,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 855 proven. 41 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2018-09-10 12:09:30,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 340 proven. 736 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:09:32,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:09:32,122 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:09:32,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:09:32,140 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:09:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:09:32,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:09:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 805 proven. 41 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-09-10 12:09:33,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:09:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 340 proven. 736 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2018-09-10 12:09:34,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:09:34,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9, 8, 9] total 30 [2018-09-10 12:09:34,760 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:09:34,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-10 12:09:34,763 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-10 12:09:34,764 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2018-09-10 12:09:34,764 INFO L87 Difference]: Start difference. First operand 56305 states and 61445 transitions. Second operand 20 states. [2018-09-10 12:10:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:10:10,342 INFO L93 Difference]: Finished difference Result 145339 states and 161652 transitions. [2018-09-10 12:10:10,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-10 12:10:10,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 770 [2018-09-10 12:10:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:10:10,502 INFO L225 Difference]: With dead ends: 145339 [2018-09-10 12:10:10,503 INFO L226 Difference]: Without dead ends: 86446 [2018-09-10 12:10:10,596 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3265 GetRequests, 3146 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4944 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2208, Invalid=11364, Unknown=0, NotChecked=0, Total=13572 [2018-09-10 12:10:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86446 states. [2018-09-10 12:10:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86446 to 81188. [2018-09-10 12:10:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81188 states. [2018-09-10 12:10:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81188 states to 81188 states and 88667 transitions. [2018-09-10 12:10:11,884 INFO L78 Accepts]: Start accepts. Automaton has 81188 states and 88667 transitions. Word has length 770 [2018-09-10 12:10:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:10:11,885 INFO L480 AbstractCegarLoop]: Abstraction has 81188 states and 88667 transitions. [2018-09-10 12:10:11,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-10 12:10:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 81188 states and 88667 transitions. [2018-09-10 12:10:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-09-10 12:10:11,921 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:10:11,922 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:10:11,922 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 12:10:11,923 INFO L82 PathProgramCache]: Analyzing trace with hash 769588175, now seen corresponding path program 1 times [2018-09-10 12:10:11,923 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:10:11,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:11,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:11,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:10:11,924 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:10:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-09-10 12:10:13,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:10:13,741 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:10:13,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:13,748 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:10:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:14,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:10:18,777 WARN L175 SmtUtils]: Spent 4.63 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-09-10 12:10:19,867 WARN L1032 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_1 Int)) (let ((.cse0 (mod v_prenex_1 299926))) (and (= .cse0 0) (<= .cse0 (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0 300073)) (<= (+ v_prenex_1 44) 0)))) (exists ((v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0_1142 Int)) (let ((.cse1 (mod v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0_1142 299926))) (and (< v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0_1142 0) (<= (+ v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0_1142 44) 0) (not (= .cse1 0)) (<= .cse1 (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a0~0 599999)))))) is different from true [2018-09-10 12:10:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 388 trivial. 19 not checked. [2018-09-10 12:10:21,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:10:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 706 proven. 2 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-10 12:10:22,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:10:22,427 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 22 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 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:10:22,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:10:22,443 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:10:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:10:23,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:10:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-09-10 12:10:26,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-09-10 12:10:26,443 WARN L183 SmtUtils]: Removed 3 from assertion stack [2018-09-10 12:10:26,443 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-10 12:10:26,644 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:10:26,645 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:10:26,650 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:10:26,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:10:26 BoogieIcfgContainer [2018-09-10 12:10:26,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:10:26,652 INFO L168 Benchmark]: Toolchain (without parser) took 230198.10 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,653 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 12:10:26,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1370.71 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: 127.0 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,654 INFO L168 Benchmark]: Boogie Procedure Inliner took 211.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,655 INFO L168 Benchmark]: Boogie Preprocessor took 708.12 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 900.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,656 INFO L168 Benchmark]: RCFGBuilder took 9743.21 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 331.2 MB). Peak memory consumption was 331.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,656 INFO L168 Benchmark]: TraceAbstraction took 218158.39 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -720.9 MB). Peak memory consumption was 799.5 MB. Max. memory is 7.1 GB. [2018-09-10 12:10:26,661 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 1370.71 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: 127.0 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 211.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 708.12 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 900.2 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9743.21 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 331.2 MB). Peak memory consumption was 331.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218158.39 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.5 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -720.9 MB). Peak memory consumption was 799.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 199]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 199). Cancelled while BasicCegarLoop was analyzing trace of length 826 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PartialQuantifierElimination was doing sequential composition of 5 TransFormulas, while SimplifyDDAWithTimeout was simplifying term of DAG size 20. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 218.0s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 153.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3111 SDtfs, 43186 SDslu, 4615 SDs, 0 SdLazy, 58610 SolverSat, 11373 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 127.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24107 GetRequests, 23812 SyntacticMatches, 39 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5408 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81188occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.5s AutomataMinimizationTime, 14 MinimizatonAttempts, 13214 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 27.7s InterpolantComputationTime, 19358 NumberOfCodeBlocks, 19358 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 31183 ConstructedInterpolants, 0 QuantifiedInterpolants, 63153093 SizeOfPredicates, 28 NumberOfNonLiveVariables, 16658 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 52 InterpolantComputations, 6 PerfectInterpolantSequences, 38821/43392 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-10-26-675.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label05_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-10-26-675.csv Completed graceful shutdown