java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label33_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:18:57,690 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:18:57,693 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:18:57,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:18:57,707 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:18:57,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:18:57,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:18:57,711 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:18:57,713 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:18:57,714 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:18:57,715 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:18:57,715 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:18:57,716 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:18:57,717 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:18:57,718 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:18:57,719 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:18:57,720 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:18:57,722 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:18:57,724 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:18:57,725 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:18:57,726 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:18:57,731 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:18:57,735 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:18:57,736 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:18:57,736 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:18:57,737 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:18:57,742 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:18:57,743 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:18:57,744 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:18:57,745 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:18:57,749 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:18:57,750 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:18:57,750 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:18:57,750 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:18:57,752 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:18:57,752 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:18:57,753 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:18:57,780 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:18:57,780 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:18:57,781 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:18:57,785 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:18:57,785 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:18:57,786 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:18:57,786 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:18:57,786 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:18:57,786 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:18:57,787 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:18:57,787 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:18:57,788 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:18:57,788 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:18:57,788 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:18:57,789 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:18:57,789 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:18:57,790 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:18:57,790 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:18:57,790 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:18:57,790 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:18:57,790 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:18:57,791 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:18:57,791 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:18:57,791 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:18:57,791 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:18:57,791 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:18:57,791 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:18:57,792 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:18:57,792 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:18:57,792 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:18:57,792 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:18:57,792 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:18:57,793 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:18:57,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:18:57,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:18:57,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:18:57,855 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:18:57,856 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:18:57,857 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label33_false-unreach-call.c [2018-07-24 12:18:58,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d38f1be8/c13c0fd334ca41c982856cf32b6e7f4f/FLAGa65c34f0e [2018-07-24 12:18:58,575 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:18:58,576 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label33_false-unreach-call.c [2018-07-24 12:18:58,609 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d38f1be8/c13c0fd334ca41c982856cf32b6e7f4f/FLAGa65c34f0e [2018-07-24 12:18:58,627 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d38f1be8/c13c0fd334ca41c982856cf32b6e7f4f [2018-07-24 12:18:58,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:18:58,641 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:18:58,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:18:58,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:18:58,648 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:18:58,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:18:58" (1/1) ... [2018-07-24 12:18:58,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f572f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:58, skipping insertion in model container [2018-07-24 12:18:58,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:18:58" (1/1) ... [2018-07-24 12:18:58,894 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:18:59,421 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:18:59,440 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:18:59,700 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:18:59,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59 WrapperNode [2018-07-24 12:18:59,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:18:59,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:18:59,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:18:59,805 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:18:59,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:18:59,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:19:00,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:19:00,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:19:00,032 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:19:00,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... [2018-07-24 12:19:00,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:19:00,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:19:00,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:19:00,575 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:19:00,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:19:00,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:19:00,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:19:00,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:19:00,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:19:00,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:19:00,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:19:00,642 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:19:00,642 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:19:00,642 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:19:00,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:19:06,961 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:19:06,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:19:06 BoogieIcfgContainer [2018-07-24 12:19:06,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:19:06,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:19:06,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:19:06,967 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:19:06,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:18:58" (1/3) ... [2018-07-24 12:19:06,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ae2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:19:06, skipping insertion in model container [2018-07-24 12:19:06,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:18:59" (2/3) ... [2018-07-24 12:19:06,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ae2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:19:06, skipping insertion in model container [2018-07-24 12:19:06,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:19:06" (3/3) ... [2018-07-24 12:19:06,976 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label33_false-unreach-call.c [2018-07-24 12:19:06,985 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:19:06,994 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:19:07,050 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:19:07,051 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:19:07,051 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:19:07,052 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:19:07,052 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:19:07,052 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:19:07,052 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:19:07,052 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:19:07,052 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:19:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:19:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-07-24 12:19:07,090 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:07,091 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:07,092 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:07,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1647194412, now seen corresponding path program 1 times [2018-07-24 12:19:07,106 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:07,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:07,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:07,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:07,156 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:07,557 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:19:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:19:07,668 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:07,668 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:19:07,669 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:07,674 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:19:07,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:19:07,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:19:07,693 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:19:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:11,786 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 12:19:11,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:19:11,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2018-07-24 12:19:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:11,812 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 12:19:11,813 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 12:19:11,823 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:19:11,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 12:19:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 12:19:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:19:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-07-24 12:19:11,957 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 34 [2018-07-24 12:19:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:11,958 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-07-24 12:19:11,958 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:19:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-07-24 12:19:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-07-24 12:19:11,965 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:11,965 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:11,966 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 381457922, now seen corresponding path program 1 times [2018-07-24 12:19:11,966 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:11,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:11,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:11,968 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:12,333 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:19:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:19:12,502 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:12,502 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 12:19:12,502 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:12,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:19:12,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:19:12,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 12:19:12,505 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-07-24 12:19:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:19,325 INFO L93 Difference]: Finished difference Result 2194 states and 4083 transitions. [2018-07-24 12:19:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:19:19,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2018-07-24 12:19:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:19,343 INFO L225 Difference]: With dead ends: 2194 [2018-07-24 12:19:19,343 INFO L226 Difference]: Without dead ends: 1456 [2018-07-24 12:19:19,349 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 12:19:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-07-24 12:19:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1436. [2018-07-24 12:19:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2018-07-24 12:19:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2550 transitions. [2018-07-24 12:19:19,419 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2550 transitions. Word has length 104 [2018-07-24 12:19:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:19,420 INFO L471 AbstractCegarLoop]: Abstraction has 1436 states and 2550 transitions. [2018-07-24 12:19:19,420 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:19:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2550 transitions. [2018-07-24 12:19:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-07-24 12:19:19,426 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:19,427 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:19,427 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2066335835, now seen corresponding path program 1 times [2018-07-24 12:19:19,428 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:19,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:19,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:19,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:19,429 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:19:19,762 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:19,762 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:19:19,762 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:19,763 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:19:19,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:19:19,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:19:19,764 INFO L87 Difference]: Start difference. First operand 1436 states and 2550 transitions. Second operand 6 states. [2018-07-24 12:19:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:25,645 INFO L93 Difference]: Finished difference Result 3936 states and 7024 transitions. [2018-07-24 12:19:25,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:19:25,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-07-24 12:19:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:25,669 INFO L225 Difference]: With dead ends: 3936 [2018-07-24 12:19:25,670 INFO L226 Difference]: Without dead ends: 2506 [2018-07-24 12:19:25,678 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:19:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2018-07-24 12:19:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2479. [2018-07-24 12:19:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2018-07-24 12:19:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3996 transitions. [2018-07-24 12:19:25,769 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3996 transitions. Word has length 133 [2018-07-24 12:19:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:25,769 INFO L471 AbstractCegarLoop]: Abstraction has 2479 states and 3996 transitions. [2018-07-24 12:19:25,770 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:19:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3996 transitions. [2018-07-24 12:19:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-07-24 12:19:25,778 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:25,779 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:25,779 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -732911593, now seen corresponding path program 1 times [2018-07-24 12:19:25,779 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:25,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:25,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:25,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:25,781 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:19:26,108 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:19:26,108 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:19:26,108 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:26,109 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:19:26,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:19:26,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:19:26,109 INFO L87 Difference]: Start difference. First operand 2479 states and 3996 transitions. Second operand 6 states. [2018-07-24 12:19:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:37,798 INFO L93 Difference]: Finished difference Result 8569 states and 14801 transitions. [2018-07-24 12:19:37,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-07-24 12:19:37,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2018-07-24 12:19:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:37,857 INFO L225 Difference]: With dead ends: 8569 [2018-07-24 12:19:37,857 INFO L226 Difference]: Without dead ends: 6096 [2018-07-24 12:19:37,897 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-07-24 12:19:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2018-07-24 12:19:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 5992. [2018-07-24 12:19:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5992 states. [2018-07-24 12:19:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 9338 transitions. [2018-07-24 12:19:38,110 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 9338 transitions. Word has length 151 [2018-07-24 12:19:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:38,111 INFO L471 AbstractCegarLoop]: Abstraction has 5992 states and 9338 transitions. [2018-07-24 12:19:38,111 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:19:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 9338 transitions. [2018-07-24 12:19:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-07-24 12:19:38,119 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:38,119 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:19:38,119 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash 569003040, now seen corresponding path program 1 times [2018-07-24 12:19:38,120 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:38,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:38,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:38,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:38,121 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 54 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:19:38,331 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:38,332 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:38,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:38,342 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:38,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:19:38,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 54 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:19:39,247 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:19:39,248 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:19:39,248 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:39,249 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:19:39,249 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:19:39,249 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:19:39,250 INFO L87 Difference]: Start difference. First operand 5992 states and 9338 transitions. Second operand 5 states. [2018-07-24 12:19:45,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:45,834 INFO L93 Difference]: Finished difference Result 16426 states and 26798 transitions. [2018-07-24 12:19:45,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:19:45,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-07-24 12:19:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:45,905 INFO L225 Difference]: With dead ends: 16426 [2018-07-24 12:19:45,906 INFO L226 Difference]: Without dead ends: 10440 [2018-07-24 12:19:45,975 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 406 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:19:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2018-07-24 12:19:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10322. [2018-07-24 12:19:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10322 states. [2018-07-24 12:19:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10322 states to 10322 states and 14016 transitions. [2018-07-24 12:19:46,281 INFO L78 Accepts]: Start accepts. Automaton has 10322 states and 14016 transitions. Word has length 206 [2018-07-24 12:19:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:46,281 INFO L471 AbstractCegarLoop]: Abstraction has 10322 states and 14016 transitions. [2018-07-24 12:19:46,282 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:19:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 10322 states and 14016 transitions. [2018-07-24 12:19:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-07-24 12:19:46,290 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:46,291 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:19:46,291 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1870130660, now seen corresponding path program 1 times [2018-07-24 12:19:46,292 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:46,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:46,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:46,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:46,293 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:46,545 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:19:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 54 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:19:46,970 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:46,970 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:46,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:46,983 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:47,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:19:47,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 54 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 12:19:47,736 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:19:47,737 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:19:47,737 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:19:47,737 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:19:47,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:19:47,738 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:19:47,738 INFO L87 Difference]: Start difference. First operand 10322 states and 14016 transitions. Second operand 5 states. [2018-07-24 12:19:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:53,326 INFO L93 Difference]: Finished difference Result 24934 states and 34995 transitions. [2018-07-24 12:19:53,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:19:53,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2018-07-24 12:19:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:53,425 INFO L225 Difference]: With dead ends: 24934 [2018-07-24 12:19:53,426 INFO L226 Difference]: Without dead ends: 14618 [2018-07-24 12:19:53,459 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 451 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:19:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14618 states. [2018-07-24 12:19:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14618 to 14540. [2018-07-24 12:19:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14540 states. [2018-07-24 12:19:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 19317 transitions. [2018-07-24 12:19:53,830 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 19317 transitions. Word has length 228 [2018-07-24 12:19:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:53,830 INFO L471 AbstractCegarLoop]: Abstraction has 14540 states and 19317 transitions. [2018-07-24 12:19:53,830 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:19:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 19317 transitions. [2018-07-24 12:19:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-07-24 12:19:53,859 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:53,859 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:19:53,860 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:19:53,860 INFO L82 PathProgramCache]: Analyzing trace with hash -832401922, now seen corresponding path program 1 times [2018-07-24 12:19:53,860 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:53,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:53,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:53,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:53,861 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 157 proven. 72 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:19:54,448 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:54,448 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:19:54,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:54,579 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:54,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 289 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:19:55,194 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 157 proven. 72 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:19:55,758 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:55,758 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:55,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:55,773 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:56,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-07-24 12:19:56,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 89 proven. 155 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-07-24 12:19:56,502 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:56,503 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 17 [2018-07-24 12:19:56,503 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:56,504 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:19:56,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:19:56,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:19:56,505 INFO L87 Difference]: Start difference. First operand 14540 states and 19317 transitions. Second operand 9 states. [2018-07-24 12:20:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:05,750 INFO L93 Difference]: Finished difference Result 51864 states and 79840 transitions. [2018-07-24 12:20:05,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:20:05,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 316 [2018-07-24 12:20:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:06,054 INFO L225 Difference]: With dead ends: 51864 [2018-07-24 12:20:06,054 INFO L226 Difference]: Without dead ends: 34954 [2018-07-24 12:20:06,258 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1260 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:20:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34954 states. [2018-07-24 12:20:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34954 to 34788. [2018-07-24 12:20:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34788 states. [2018-07-24 12:20:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34788 states to 34788 states and 47740 transitions. [2018-07-24 12:20:08,276 INFO L78 Accepts]: Start accepts. Automaton has 34788 states and 47740 transitions. Word has length 316 [2018-07-24 12:20:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:08,277 INFO L471 AbstractCegarLoop]: Abstraction has 34788 states and 47740 transitions. [2018-07-24 12:20:08,277 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:20:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34788 states and 47740 transitions. [2018-07-24 12:20:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-07-24 12:20:08,366 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:08,367 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:08,367 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash 372327263, now seen corresponding path program 1 times [2018-07-24 12:20:08,368 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:08,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:08,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:08,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:08,370 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:09,252 WARN L169 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:20:09,674 WARN L169 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-07-24 12:20:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 176 proven. 116 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:20:10,619 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:10,619 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:10,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:10,628 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:10,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 352 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-07-24 12:20:11,202 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 176 proven. 116 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-07-24 12:20:11,639 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:11,640 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:11,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:11,656 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:12,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-07-24 12:20:12,222 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 89 proven. 199 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-07-24 12:20:12,676 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:20:12,676 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 5, 5, 5] total 24 [2018-07-24 12:20:12,676 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:20:12,677 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:20:12,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:20:12,678 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2018-07-24 12:20:12,678 INFO L87 Difference]: Start difference. First operand 34788 states and 47740 transitions. Second operand 5 states. [2018-07-24 12:20:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:20,292 INFO L93 Difference]: Finished difference Result 74518 states and 110591 transitions. [2018-07-24 12:20:20,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:20:20,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 517 [2018-07-24 12:20:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:20,586 INFO L225 Difference]: With dead ends: 74518 [2018-07-24 12:20:20,587 INFO L226 Difference]: Without dead ends: 29599 [2018-07-24 12:20:21,010 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2080 GetRequests, 2056 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2018-07-24 12:20:21,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29599 states. [2018-07-24 12:20:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29599 to 29489. [2018-07-24 12:20:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29489 states. [2018-07-24 12:20:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29489 states to 29489 states and 35068 transitions. [2018-07-24 12:20:22,038 INFO L78 Accepts]: Start accepts. Automaton has 29489 states and 35068 transitions. Word has length 517 [2018-07-24 12:20:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:22,038 INFO L471 AbstractCegarLoop]: Abstraction has 29489 states and 35068 transitions. [2018-07-24 12:20:22,038 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:20:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29489 states and 35068 transitions. [2018-07-24 12:20:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2018-07-24 12:20:22,135 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:22,135 INFO L353 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:22,136 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2008589654, now seen corresponding path program 1 times [2018-07-24 12:20:22,136 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:22,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:22,137 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:22,820 WARN L169 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 12:20:23,308 WARN L169 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-07-24 12:20:23,676 WARN L169 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2018-07-24 12:20:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 249 proven. 356 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2018-07-24 12:20:24,948 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:24,948 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:24,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:24,957 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:25,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 978 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2018-07-24 12:20:25,708 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 373 proven. 228 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-07-24 12:20:26,631 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:26,631 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:26,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:26,646 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:27,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 978 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2018-07-24 12:20:28,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 373 proven. 228 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-07-24 12:20:28,688 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:20:28,689 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5, 5, 5] total 20 [2018-07-24 12:20:28,689 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:20:28,690 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:20:28,691 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:20:28,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:20:28,691 INFO L87 Difference]: Start difference. First operand 29489 states and 35068 transitions. Second operand 13 states. [2018-07-24 12:20:34,892 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-07-24 12:20:35,941 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-07-24 12:20:37,728 WARN L169 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-07-24 12:20:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:39,270 INFO L93 Difference]: Finished difference Result 65215 states and 78276 transitions. [2018-07-24 12:20:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-07-24 12:20:39,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 772 [2018-07-24 12:20:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:39,662 INFO L225 Difference]: With dead ends: 65215 [2018-07-24 12:20:39,663 INFO L226 Difference]: Without dead ends: 35737 [2018-07-24 12:20:40,113 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3149 GetRequests, 3101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2018-07-24 12:20:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35737 states. [2018-07-24 12:20:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35737 to 35680. [2018-07-24 12:20:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35680 states. [2018-07-24 12:20:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35680 states to 35680 states and 41980 transitions. [2018-07-24 12:20:41,859 INFO L78 Accepts]: Start accepts. Automaton has 35680 states and 41980 transitions. Word has length 772 [2018-07-24 12:20:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:41,859 INFO L471 AbstractCegarLoop]: Abstraction has 35680 states and 41980 transitions. [2018-07-24 12:20:41,859 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:20:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 35680 states and 41980 transitions. [2018-07-24 12:20:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2018-07-24 12:20:41,942 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:41,943 INFO L353 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:41,943 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1214922421, now seen corresponding path program 1 times [2018-07-24 12:20:41,944 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:41,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:41,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 342 proven. 228 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2018-07-24 12:20:43,118 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:43,118 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:43,127 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:43,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 1138 proven. 2 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2018-07-24 12:20:44,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 342 proven. 228 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2018-07-24 12:20:44,810 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:44,810 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:44,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:44,828 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:45,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 1138 proven. 2 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2018-07-24 12:20:46,106 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 342 proven. 228 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2018-07-24 12:20:46,636 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:20:46,639 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:20:46,639 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:20:46,641 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:20:46,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:20:46,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:20:46,641 INFO L87 Difference]: Start difference. First operand 35680 states and 41980 transitions. Second operand 9 states. [2018-07-24 12:20:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:20:54,052 INFO L93 Difference]: Finished difference Result 71129 states and 83733 transitions. [2018-07-24 12:20:54,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:20:54,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 997 [2018-07-24 12:20:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:20:54,357 INFO L225 Difference]: With dead ends: 71129 [2018-07-24 12:20:54,357 INFO L226 Difference]: Without dead ends: 35796 [2018-07-24 12:20:54,702 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4004 GetRequests, 3985 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:20:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35796 states. [2018-07-24 12:20:55,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35796 to 35433. [2018-07-24 12:20:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35433 states. [2018-07-24 12:20:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35433 states to 35433 states and 40308 transitions. [2018-07-24 12:20:55,616 INFO L78 Accepts]: Start accepts. Automaton has 35433 states and 40308 transitions. Word has length 997 [2018-07-24 12:20:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:20:55,617 INFO L471 AbstractCegarLoop]: Abstraction has 35433 states and 40308 transitions. [2018-07-24 12:20:55,617 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:20:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 35433 states and 40308 transitions. [2018-07-24 12:20:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2018-07-24 12:20:55,663 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:20:55,664 INFO L353 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:20:55,664 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:20:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -424280282, now seen corresponding path program 1 times [2018-07-24 12:20:55,665 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:20:55,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:55,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:55,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:20:55,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:20:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 832 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-07-24 12:20:57,624 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:57,624 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:20:57,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:57,633 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:20:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:20:57,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:20:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 832 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-07-24 12:20:58,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:20:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 832 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-07-24 12:20:59,377 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:20:59,377 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:20:59,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:20:59,398 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:00,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 832 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-07-24 12:21:00,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 832 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-07-24 12:21:01,391 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:01,392 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:21:01,392 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:01,393 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:21:01,393 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:21:01,394 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:21:01,394 INFO L87 Difference]: Start difference. First operand 35433 states and 40308 transitions. Second operand 9 states. [2018-07-24 12:21:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:08,844 INFO L93 Difference]: Finished difference Result 69471 states and 78995 transitions. [2018-07-24 12:21:08,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-07-24 12:21:08,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 998 [2018-07-24 12:21:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:08,939 INFO L225 Difference]: With dead ends: 69471 [2018-07-24 12:21:08,939 INFO L226 Difference]: Without dead ends: 29036 [2018-07-24 12:21:09,285 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4018 GetRequests, 3993 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:21:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29036 states. [2018-07-24 12:21:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29036 to 27913. [2018-07-24 12:21:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27913 states. [2018-07-24 12:21:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27913 states to 27913 states and 29661 transitions. [2018-07-24 12:21:09,698 INFO L78 Accepts]: Start accepts. Automaton has 27913 states and 29661 transitions. Word has length 998 [2018-07-24 12:21:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:09,699 INFO L471 AbstractCegarLoop]: Abstraction has 27913 states and 29661 transitions. [2018-07-24 12:21:09,699 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:21:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27913 states and 29661 transitions. [2018-07-24 12:21:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2018-07-24 12:21:09,725 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:09,725 INFO L353 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:09,726 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1259553858, now seen corresponding path program 1 times [2018-07-24 12:21:09,726 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:09,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:09,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:09,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:09,727 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:10,334 WARN L169 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:21:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 931 proven. 253 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-07-24 12:21:11,096 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:11,096 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:11,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:11,105 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:11,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-07-24 12:21:11,996 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-07-24 12:21:12,427 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:21:12,427 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:21:12,428 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:12,428 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:21:12,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:21:12,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:12,429 INFO L87 Difference]: Start difference. First operand 27913 states and 29661 transitions. Second operand 3 states. [2018-07-24 12:21:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:14,159 INFO L93 Difference]: Finished difference Result 53108 states and 56456 transitions. [2018-07-24 12:21:14,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:21:14,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1000 [2018-07-24 12:21:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:14,232 INFO L225 Difference]: With dead ends: 53108 [2018-07-24 12:21:14,232 INFO L226 Difference]: Without dead ends: 28251 [2018-07-24 12:21:14,278 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2015 GetRequests, 2002 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:21:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2018-07-24 12:21:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 27910. [2018-07-24 12:21:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27910 states. [2018-07-24 12:21:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27910 states to 27910 states and 29508 transitions. [2018-07-24 12:21:14,676 INFO L78 Accepts]: Start accepts. Automaton has 27910 states and 29508 transitions. Word has length 1000 [2018-07-24 12:21:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:14,677 INFO L471 AbstractCegarLoop]: Abstraction has 27910 states and 29508 transitions. [2018-07-24 12:21:14,678 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:21:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 27910 states and 29508 transitions. [2018-07-24 12:21:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1042 [2018-07-24 12:21:14,711 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:14,711 INFO L353 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:21:14,712 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash 374626751, now seen corresponding path program 1 times [2018-07-24 12:21:14,712 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:14,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:14,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:14,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:14,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 591 proven. 273 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-07-24 12:21:17,670 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:17,670 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:17,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:17,678 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:17,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2018-07-24 12:21:18,392 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2018-07-24 12:21:18,889 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:21:18,890 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 14 [2018-07-24 12:21:18,890 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:18,890 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:21:18,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:21:18,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:21:18,891 INFO L87 Difference]: Start difference. First operand 27910 states and 29508 transitions. Second operand 3 states. [2018-07-24 12:21:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:20,797 INFO L93 Difference]: Finished difference Result 52755 states and 55793 transitions. [2018-07-24 12:21:20,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:21:20,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1041 [2018-07-24 12:21:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:20,862 INFO L225 Difference]: With dead ends: 52755 [2018-07-24 12:21:20,862 INFO L226 Difference]: Without dead ends: 27901 [2018-07-24 12:21:20,907 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2095 GetRequests, 2080 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:21:20,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27901 states. [2018-07-24 12:21:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27901 to 26978. [2018-07-24 12:21:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26978 states. [2018-07-24 12:21:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26978 states to 26978 states and 28406 transitions. [2018-07-24 12:21:21,360 INFO L78 Accepts]: Start accepts. Automaton has 26978 states and 28406 transitions. Word has length 1041 [2018-07-24 12:21:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:21,362 INFO L471 AbstractCegarLoop]: Abstraction has 26978 states and 28406 transitions. [2018-07-24 12:21:21,362 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:21:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26978 states and 28406 transitions. [2018-07-24 12:21:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1262 [2018-07-24 12:21:21,411 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:21,412 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:21:21,413 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -136919311, now seen corresponding path program 1 times [2018-07-24 12:21:21,413 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:21,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:21,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:21,415 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 633 proven. 486 refuted. 0 times theorem prover too weak. 1284 trivial. 0 not checked. [2018-07-24 12:21:24,977 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:24,977 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:21:24,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:24,989 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:25,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 925 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2018-07-24 12:21:26,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 162 proven. 878 refuted. 0 times theorem prover too weak. 1363 trivial. 0 not checked. [2018-07-24 12:21:28,002 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:21:28,002 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 5] total 18 [2018-07-24 12:21:28,002 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:21:28,003 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:21:28,004 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:21:28,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:21:28,004 INFO L87 Difference]: Start difference. First operand 26978 states and 28406 transitions. Second operand 5 states. [2018-07-24 12:21:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:21:31,940 INFO L93 Difference]: Finished difference Result 56031 states and 58947 transitions. [2018-07-24 12:21:31,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:21:31,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1261 [2018-07-24 12:21:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:21:31,999 INFO L225 Difference]: With dead ends: 56031 [2018-07-24 12:21:31,999 INFO L226 Difference]: Without dead ends: 29400 [2018-07-24 12:21:32,037 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2537 GetRequests, 2518 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:21:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29400 states. [2018-07-24 12:21:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29400 to 28301. [2018-07-24 12:21:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28301 states. [2018-07-24 12:21:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28301 states to 28301 states and 29739 transitions. [2018-07-24 12:21:32,368 INFO L78 Accepts]: Start accepts. Automaton has 28301 states and 29739 transitions. Word has length 1261 [2018-07-24 12:21:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:21:32,369 INFO L471 AbstractCegarLoop]: Abstraction has 28301 states and 29739 transitions. [2018-07-24 12:21:32,369 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:21:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28301 states and 29739 transitions. [2018-07-24 12:21:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1510 [2018-07-24 12:21:32,408 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:21:32,409 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-07-24 12:21:32,409 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:21:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1074875833, now seen corresponding path program 1 times [2018-07-24 12:21:32,410 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:21:32,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:32,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:32,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:21:32,411 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:21:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:33,627 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2018-07-24 12:21:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 921 proven. 486 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2018-07-24 12:21:37,987 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:37,987 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:21:37,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:37,994 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:38,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 2093 proven. 6 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2018-07-24 12:21:39,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 215 proven. 1999 refuted. 0 times theorem prover too weak. 1363 trivial. 0 not checked. [2018-07-24 12:21:44,430 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:21:44,430 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:21:44,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:21:44,447 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:21:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:21:45,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:21:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 1852 proven. 6 refuted. 0 times theorem prover too weak. 1719 trivial. 0 not checked. [2018-07-24 12:21:47,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:21:48,168 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-07-24 12:21:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 217 proven. 1997 refuted. 0 times theorem prover too weak. 1363 trivial. 0 not checked. [2018-07-24 12:21:55,328 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:21:55,329 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 7, 8] total 34 [2018-07-24 12:21:55,330 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:21:55,332 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 12:21:55,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 12:21:55,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2018-07-24 12:21:55,333 INFO L87 Difference]: Start difference. First operand 28301 states and 29739 transitions. Second operand 19 states. [2018-07-24 12:21:57,954 WARN L169 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:21:58,131 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-07-24 12:22:01,575 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-07-24 12:22:01,901 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-07-24 12:22:04,713 WARN L169 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2018-07-24 12:22:05,009 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-07-24 12:22:06,171 WARN L169 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-07-24 12:22:08,301 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:22:08,658 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-07-24 12:22:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:09,558 INFO L93 Difference]: Finished difference Result 57510 states and 60458 transitions. [2018-07-24 12:22:09,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-07-24 12:22:09,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1509 [2018-07-24 12:22:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:09,641 INFO L225 Difference]: With dead ends: 57510 [2018-07-24 12:22:09,641 INFO L226 Difference]: Without dead ends: 29893 [2018-07-24 12:22:09,692 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6107 GetRequests, 6037 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=795, Invalid=3761, Unknown=0, NotChecked=0, Total=4556 [2018-07-24 12:22:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29893 states. [2018-07-24 12:22:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29893 to 28641. [2018-07-24 12:22:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28641 states. [2018-07-24 12:22:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28641 states to 28641 states and 30062 transitions. [2018-07-24 12:22:10,131 INFO L78 Accepts]: Start accepts. Automaton has 28641 states and 30062 transitions. Word has length 1509 [2018-07-24 12:22:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:10,132 INFO L471 AbstractCegarLoop]: Abstraction has 28641 states and 30062 transitions. [2018-07-24 12:22:10,132 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 12:22:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 28641 states and 30062 transitions. [2018-07-24 12:22:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1553 [2018-07-24 12:22:10,176 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:10,177 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:22:10,177 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1179248182, now seen corresponding path program 1 times [2018-07-24 12:22:10,178 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:10,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:10,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:10,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:10,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 1272 proven. 215 refuted. 0 times theorem prover too weak. 3329 trivial. 0 not checked. [2018-07-24 12:22:12,937 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:12,938 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:12,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:12,952 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:13,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 2188 proven. 2 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2018-07-24 12:22:15,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 279 proven. 2072 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2018-07-24 12:22:18,087 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:18,087 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:22:18,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:18,107 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:19,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 2427 proven. 26 refuted. 0 times theorem prover too weak. 2363 trivial. 0 not checked. [2018-07-24 12:22:20,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 1272 proven. 215 refuted. 0 times theorem prover too weak. 3329 trivial. 0 not checked. [2018-07-24 12:22:23,320 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:22:23,321 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-07-24 12:22:23,321 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:22:23,323 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 12:22:23,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 12:22:23,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:22:23,323 INFO L87 Difference]: Start difference. First operand 28641 states and 30062 transitions. Second operand 14 states. [2018-07-24 12:22:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:22:37,998 INFO L93 Difference]: Finished difference Result 58075 states and 60967 transitions. [2018-07-24 12:22:37,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-07-24 12:22:37,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1552 [2018-07-24 12:22:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:22:38,054 INFO L225 Difference]: With dead ends: 58075 [2018-07-24 12:22:38,055 INFO L226 Difference]: Without dead ends: 30458 [2018-07-24 12:22:38,089 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6276 GetRequests, 6219 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2018-07-24 12:22:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30458 states. [2018-07-24 12:22:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30458 to 28647. [2018-07-24 12:22:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28647 states. [2018-07-24 12:22:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28647 states to 28647 states and 30011 transitions. [2018-07-24 12:22:38,416 INFO L78 Accepts]: Start accepts. Automaton has 28647 states and 30011 transitions. Word has length 1552 [2018-07-24 12:22:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:22:38,417 INFO L471 AbstractCegarLoop]: Abstraction has 28647 states and 30011 transitions. [2018-07-24 12:22:38,417 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 12:22:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 28647 states and 30011 transitions. [2018-07-24 12:22:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1694 [2018-07-24 12:22:38,451 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:22:38,452 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-07-24 12:22:38,452 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:22:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash 768000509, now seen corresponding path program 1 times [2018-07-24 12:22:38,453 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:22:38,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:38,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:38,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:22:38,454 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:22:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:40,064 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-07-24 12:22:40,344 WARN L169 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:22:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5183 backedges. 2984 proven. 700 refuted. 0 times theorem prover too weak. 1499 trivial. 0 not checked. [2018-07-24 12:22:42,943 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:22:42,943 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:22:42,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:22:42,951 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:22:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:22:43,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:22:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5183 backedges. 3594 proven. 2 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2018-07-24 12:22:45,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:22:45,455 WARN L169 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:22:45,665 WARN L169 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:22:46,501 WARN L169 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 Received shutdown request... [2018-07-24 12:22:46,740 WARN L177 SmtUtils]: Removed 3 from assertion stack [2018-07-24 12:22:46,741 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:22:46,942 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:22:46,942 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:22:46,948 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:22:46,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:22:46 BoogieIcfgContainer [2018-07-24 12:22:46,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:22:46,952 INFO L168 Benchmark]: Toolchain (without parser) took 228312.51 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -532.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,953 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:22:46,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1162.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 227.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,960 INFO L168 Benchmark]: Boogie Preprocessor took 541.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 826.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -974.6 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,961 INFO L168 Benchmark]: RCFGBuilder took 6388.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 287.3 MB). Peak memory consumption was 287.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,962 INFO L168 Benchmark]: TraceAbstraction took 219985.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 27.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-07-24 12:22:46,973 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1162.68 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 227.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 541.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 826.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -974.6 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6388.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 287.3 MB). Peak memory consumption was 287.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219985.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 27.7 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 88). Cancelled while BasicCegarLoop was analyzing trace of length 1694 with TraceHistMax 9, while TraceCheckSpWp was constructing backward predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 28. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 219.9s OverallTime, 17 OverallIterations, 10 TraceHistogramMax, 123.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1897 SDtfs, 34368 SDslu, 2915 SDs, 0 SdLazy, 64856 SolverSat, 7747 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 91.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34482 GetRequests, 34117 SyntacticMatches, 38 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 19.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35680occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 9.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 7592 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 53.7s InterpolantComputationTime, 27877 NumberOfCodeBlocks, 27877 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 44881 ConstructedInterpolants, 0 QuantifiedInterpolants, 216218205 SizeOfPredicates, 25 NumberOfNonLiveVariables, 22927 ConjunctsInSsa, 205 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 72714/84158 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label33_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-22-46-996.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label33_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-22-46-996.csv Completed graceful shutdown