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_label04_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:15:51,011 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:15:51,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:15:51,026 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:15:51,026 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:15:51,027 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:15:51,028 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:15:51,030 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:15:51,032 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:15:51,033 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:15:51,034 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:15:51,034 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:15:51,035 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:15:51,036 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:15:51,038 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:15:51,038 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:15:51,039 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:15:51,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:15:51,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:15:51,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:15:51,050 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:15:51,051 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:15:51,057 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:15:51,058 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:15:51,058 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:15:51,059 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:15:51,062 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:15:51,063 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:15:51,064 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:15:51,065 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:15:51,066 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:15:51,070 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 12:15:51,070 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 12:15:51,070 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 12:15:51,072 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 12:15:51,072 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 12:15:51,073 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:15:51,109 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:15:51,109 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:15:51,110 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:15:51,110 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:15:51,111 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:15:51,111 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:15:51,111 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:15:51,112 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:15:51,112 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:15:51,112 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:15:51,113 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:15:51,113 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:15:51,114 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:15:51,114 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:15:51,114 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:15:51,115 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:15:51,115 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:15:51,116 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:15:51,116 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:15:51,116 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:15:51,116 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:15:51,116 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:15:51,117 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:15:51,117 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:15:51,117 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:15:51,118 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:15:51,118 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:15:51,118 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:15:51,118 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:15:51,118 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:15:51,119 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:15:51,119 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:15:51,119 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:15:51,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:15:51,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:15:51,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:15:51,187 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:15:51,187 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:15:51,188 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label04_false-unreach-call.c [2018-07-24 12:15:51,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3def694/4535485b5a2f457a8f6180226f720212/FLAG930e3500e [2018-07-24 12:15:51,891 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:15:51,892 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label04_false-unreach-call.c [2018-07-24 12:15:51,914 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3def694/4535485b5a2f457a8f6180226f720212/FLAG930e3500e [2018-07-24 12:15:51,929 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb3def694/4535485b5a2f457a8f6180226f720212 [2018-07-24 12:15:51,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:15:51,942 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:15:51,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:51,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:15:51,950 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:15:51,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:51" (1/1) ... [2018-07-24 12:15:51,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f06eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:51, skipping insertion in model container [2018-07-24 12:15:51,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:15:51" (1/1) ... [2018-07-24 12:15:52,243 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:15:52,764 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:52,781 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:15:53,031 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:15:53,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53 WrapperNode [2018-07-24 12:15:53,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:15:53,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:53,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:15:53,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:15:53,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:15:53,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:15:53,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:15:53,330 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:15:53,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... [2018-07-24 12:15:53,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:15:53,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:15:53,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:15:53,818 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:15:53,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:15:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:15:53,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:15:53,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:15:53,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:15:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:15:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:15:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:15:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output2 [2018-07-24 12:15:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_output [2018-07-24 12:15:53,894 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 12:16:00,012 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:16:00,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:16:00 BoogieIcfgContainer [2018-07-24 12:16:00,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:16:00,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:16:00,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:16:00,018 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:16:00,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:15:51" (1/3) ... [2018-07-24 12:16:00,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f36775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:16:00, skipping insertion in model container [2018-07-24 12:16:00,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:15:53" (2/3) ... [2018-07-24 12:16:00,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f36775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:16:00, skipping insertion in model container [2018-07-24 12:16:00,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:16:00" (3/3) ... [2018-07-24 12:16:00,024 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label04_false-unreach-call.c [2018-07-24 12:16:00,033 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:16:00,041 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:16:00,097 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:16:00,098 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:16:00,098 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:16:00,098 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:16:00,098 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:16:00,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:16:00,099 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:16:00,099 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:16:00,099 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:16:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-07-24 12:16:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-07-24 12:16:00,139 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:00,140 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, 1] [2018-07-24 12:16:00,141 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 12:16:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 476585195, now seen corresponding path program 1 times [2018-07-24 12:16:00,150 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:00,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:00,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:00,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:00,202 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:00,652 WARN L169 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:00,768 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 12:16:00,771 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:00,771 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:16:00,772 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:00,778 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:00,792 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:00,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:16:00,795 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-07-24 12:16:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:04,454 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-07-24 12:16:04,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:04,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2018-07-24 12:16:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:04,482 INFO L225 Difference]: With dead ends: 1156 [2018-07-24 12:16:04,482 INFO L226 Difference]: Without dead ends: 744 [2018-07-24 12:16:04,490 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 12:16:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-07-24 12:16:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-07-24 12:16:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-07-24 12:16:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1343 transitions. [2018-07-24 12:16:04,591 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1343 transitions. Word has length 35 [2018-07-24 12:16:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:04,591 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1343 transitions. [2018-07-24 12:16:04,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1343 transitions. [2018-07-24 12:16:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-07-24 12:16:04,598 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:04,598 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, 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] [2018-07-24 12:16:04,599 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 12:16:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash -339633007, now seen corresponding path program 1 times [2018-07-24 12:16:04,599 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:04,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:04,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:04,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:04,601 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:04,993 WARN L169 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:05,218 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:05,218 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:05,218 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:05,220 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:05,220 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:05,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:05,221 INFO L87 Difference]: Start difference. First operand 744 states and 1343 transitions. Second operand 6 states. [2018-07-24 12:16:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:13,963 INFO L93 Difference]: Finished difference Result 2846 states and 5292 transitions. [2018-07-24 12:16:13,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:13,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2018-07-24 12:16:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:13,985 INFO L225 Difference]: With dead ends: 2846 [2018-07-24 12:16:13,985 INFO L226 Difference]: Without dead ends: 2108 [2018-07-24 12:16:13,993 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2018-07-24 12:16:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2090. [2018-07-24 12:16:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2018-07-24 12:16:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3323 transitions. [2018-07-24 12:16:14,099 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3323 transitions. Word has length 108 [2018-07-24 12:16:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:14,100 INFO L471 AbstractCegarLoop]: Abstraction has 2090 states and 3323 transitions. [2018-07-24 12:16:14,100 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:14,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3323 transitions. [2018-07-24 12:16:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-24 12:16:14,108 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:14,109 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, 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] [2018-07-24 12:16:14,109 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 12:16:14,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1474791748, now seen corresponding path program 1 times [2018-07-24 12:16:14,115 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:14,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:14,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:14,117 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:14,412 WARN L169 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:14,451 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:14,451 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:14,451 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:14,452 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:14,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:14,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:14,453 INFO L87 Difference]: Start difference. First operand 2090 states and 3323 transitions. Second operand 6 states. [2018-07-24 12:16:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:19,763 INFO L93 Difference]: Finished difference Result 5579 states and 9308 transitions. [2018-07-24 12:16:19,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:19,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2018-07-24 12:16:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:19,794 INFO L225 Difference]: With dead ends: 5579 [2018-07-24 12:16:19,794 INFO L226 Difference]: Without dead ends: 3495 [2018-07-24 12:16:19,802 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2018-07-24 12:16:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3483. [2018-07-24 12:16:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3483 states. [2018-07-24 12:16:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5365 transitions. [2018-07-24 12:16:19,897 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5365 transitions. Word has length 137 [2018-07-24 12:16:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:19,897 INFO L471 AbstractCegarLoop]: Abstraction has 3483 states and 5365 transitions. [2018-07-24 12:16:19,898 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5365 transitions. [2018-07-24 12:16:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-07-24 12:16:19,901 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:19,901 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:19,901 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 12:16:19,902 INFO L82 PathProgramCache]: Analyzing trace with hash -883518815, now seen corresponding path program 1 times [2018-07-24 12:16:19,902 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:19,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:19,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:19,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:19,903 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:20,193 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:20,194 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:20,194 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:20,194 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:20,195 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:20,195 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:20,195 INFO L87 Difference]: Start difference. First operand 3483 states and 5365 transitions. Second operand 6 states. [2018-07-24 12:16:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:23,248 INFO L93 Difference]: Finished difference Result 7681 states and 11860 transitions. [2018-07-24 12:16:23,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:23,249 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-07-24 12:16:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:23,274 INFO L225 Difference]: With dead ends: 7681 [2018-07-24 12:16:23,274 INFO L226 Difference]: Without dead ends: 4204 [2018-07-24 12:16:23,290 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2018-07-24 12:16:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4182. [2018-07-24 12:16:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4182 states. [2018-07-24 12:16:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4182 states to 4182 states and 5894 transitions. [2018-07-24 12:16:23,406 INFO L78 Accepts]: Start accepts. Automaton has 4182 states and 5894 transitions. Word has length 180 [2018-07-24 12:16:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:23,406 INFO L471 AbstractCegarLoop]: Abstraction has 4182 states and 5894 transitions. [2018-07-24 12:16:23,406 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4182 states and 5894 transitions. [2018-07-24 12:16:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-07-24 12:16:23,409 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:23,410 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, 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] [2018-07-24 12:16:23,410 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1851777768, now seen corresponding path program 1 times [2018-07-24 12:16:23,411 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:23,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:23,412 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:23,671 WARN L169 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:23,751 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:23,751 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:16:23,751 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:23,751 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:16:23,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:16:23,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:16:23,752 INFO L87 Difference]: Start difference. First operand 4182 states and 5894 transitions. Second operand 6 states. [2018-07-24 12:16:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:28,396 INFO L93 Difference]: Finished difference Result 10428 states and 14671 transitions. [2018-07-24 12:16:28,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:16:28,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 199 [2018-07-24 12:16:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:28,426 INFO L225 Difference]: With dead ends: 10428 [2018-07-24 12:16:28,427 INFO L226 Difference]: Without dead ends: 6252 [2018-07-24 12:16:28,449 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6252 states. [2018-07-24 12:16:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6252 to 6221. [2018-07-24 12:16:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6221 states. [2018-07-24 12:16:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6221 states to 6221 states and 8241 transitions. [2018-07-24 12:16:28,590 INFO L78 Accepts]: Start accepts. Automaton has 6221 states and 8241 transitions. Word has length 199 [2018-07-24 12:16:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:28,591 INFO L471 AbstractCegarLoop]: Abstraction has 6221 states and 8241 transitions. [2018-07-24 12:16:28,591 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:16:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 6221 states and 8241 transitions. [2018-07-24 12:16:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-07-24 12:16:28,596 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:28,597 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:28,597 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1478528624, now seen corresponding path program 1 times [2018-07-24 12:16:28,597 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:28,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:28,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:28,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:28,599 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:16:29,231 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:16:29,231 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-07-24 12:16:29,231 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:29,232 INFO L450 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-07-24 12:16:29,232 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-07-24 12:16:29,232 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:16:29,232 INFO L87 Difference]: Start difference. First operand 6221 states and 8241 transitions. Second operand 4 states. [2018-07-24 12:16:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:36,372 INFO L93 Difference]: Finished difference Result 15147 states and 20351 transitions. [2018-07-24 12:16:36,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-07-24 12:16:36,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 275 [2018-07-24 12:16:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:36,424 INFO L225 Difference]: With dead ends: 15147 [2018-07-24 12:16:36,424 INFO L226 Difference]: Without dead ends: 8932 [2018-07-24 12:16:36,456 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-07-24 12:16:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2018-07-24 12:16:36,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8932. [2018-07-24 12:16:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8932 states. [2018-07-24 12:16:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 11515 transitions. [2018-07-24 12:16:36,668 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 11515 transitions. Word has length 275 [2018-07-24 12:16:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:36,668 INFO L471 AbstractCegarLoop]: Abstraction has 8932 states and 11515 transitions. [2018-07-24 12:16:36,669 INFO L472 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-07-24 12:16:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 11515 transitions. [2018-07-24 12:16:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-07-24 12:16:36,682 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:36,682 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:16:36,683 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1117371719, now seen corresponding path program 1 times [2018-07-24 12:16:36,683 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:36,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:36,684 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:37,047 WARN L169 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 82 proven. 204 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-07-24 12:16:37,999 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:38,000 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:38,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:38,028 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:38,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-07-24 12:16:38,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-07-24 12:16:39,288 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 12:16:39,289 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-07-24 12:16:39,289 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:39,290 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:16:39,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:16:39,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:39,290 INFO L87 Difference]: Start difference. First operand 8932 states and 11515 transitions. Second operand 3 states. [2018-07-24 12:16:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:42,000 INFO L93 Difference]: Finished difference Result 17858 states and 23024 transitions. [2018-07-24 12:16:42,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:16:42,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 380 [2018-07-24 12:16:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:42,037 INFO L225 Difference]: With dead ends: 17858 [2018-07-24 12:16:42,037 INFO L226 Difference]: Without dead ends: 8932 [2018-07-24 12:16:42,083 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 760 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:16:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8932 states. [2018-07-24 12:16:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8932 to 8926. [2018-07-24 12:16:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8926 states. [2018-07-24 12:16:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8926 states to 8926 states and 10901 transitions. [2018-07-24 12:16:42,281 INFO L78 Accepts]: Start accepts. Automaton has 8926 states and 10901 transitions. Word has length 380 [2018-07-24 12:16:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:42,282 INFO L471 AbstractCegarLoop]: Abstraction has 8926 states and 10901 transitions. [2018-07-24 12:16:42,283 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:16:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8926 states and 10901 transitions. [2018-07-24 12:16:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2018-07-24 12:16:42,315 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:42,316 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:16:42,316 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash 703812267, now seen corresponding path program 1 times [2018-07-24 12:16:42,316 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:42,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:42,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:42,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:42,318 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 236 proven. 200 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-07-24 12:16:43,099 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:43,099 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:43,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:43,109 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:43,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 590 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 12:16:43,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 236 proven. 200 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-07-24 12:16:44,406 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:44,406 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:16:44,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:44,422 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:44,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 590 proven. 2 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-07-24 12:16:45,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 236 proven. 200 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-07-24 12:16:45,510 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:16:45,510 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-07-24 12:16:45,510 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:16:45,512 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:16:45,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:16:45,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-07-24 12:16:45,512 INFO L87 Difference]: Start difference. First operand 8926 states and 10901 transitions. Second operand 9 states. [2018-07-24 12:16:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:16:52,789 INFO L93 Difference]: Finished difference Result 24214 states and 31198 transitions. [2018-07-24 12:16:52,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:16:52,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 585 [2018-07-24 12:16:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:16:52,874 INFO L225 Difference]: With dead ends: 24214 [2018-07-24 12:16:52,874 INFO L226 Difference]: Without dead ends: 15294 [2018-07-24 12:16:52,916 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2360 GetRequests, 2339 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:16:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15294 states. [2018-07-24 12:16:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15294 to 15219. [2018-07-24 12:16:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2018-07-24 12:16:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 18704 transitions. [2018-07-24 12:16:53,327 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 18704 transitions. Word has length 585 [2018-07-24 12:16:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:16:53,328 INFO L471 AbstractCegarLoop]: Abstraction has 15219 states and 18704 transitions. [2018-07-24 12:16:53,328 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:16:53,329 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 18704 transitions. [2018-07-24 12:16:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2018-07-24 12:16:53,418 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:16:53,419 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:16:53,419 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:16:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1416765281, now seen corresponding path program 1 times [2018-07-24 12:16:53,419 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:16:53,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:53,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:53,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:16:53,420 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:16:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:53,865 WARN L169 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:16:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 112 proven. 485 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-07-24 12:16:54,878 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:16:54,878 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:16:54,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:16:54,889 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:16:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:16:55,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:16:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 525 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-07-24 12:16:55,854 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:16:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 112 proven. 485 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-07-24 12:16:57,389 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:16:57,389 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 12:16:57,389 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:16:57,390 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:16:57,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:16:57,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:16:57,391 INFO L87 Difference]: Start difference. First operand 15219 states and 18704 transitions. Second operand 5 states. [2018-07-24 12:17:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:02,437 INFO L93 Difference]: Finished difference Result 31608 states and 39057 transitions. [2018-07-24 12:17:02,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:17:02,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 755 [2018-07-24 12:17:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:02,511 INFO L225 Difference]: With dead ends: 31608 [2018-07-24 12:17:02,512 INFO L226 Difference]: Without dead ends: 16395 [2018-07-24 12:17:02,570 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1519 GetRequests, 1505 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:17:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16395 states. [2018-07-24 12:17:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16395 to 16358. [2018-07-24 12:17:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16358 states. [2018-07-24 12:17:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16358 states to 16358 states and 19733 transitions. [2018-07-24 12:17:02,892 INFO L78 Accepts]: Start accepts. Automaton has 16358 states and 19733 transitions. Word has length 755 [2018-07-24 12:17:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:02,893 INFO L471 AbstractCegarLoop]: Abstraction has 16358 states and 19733 transitions. [2018-07-24 12:17:02,893 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:17:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 16358 states and 19733 transitions. [2018-07-24 12:17:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2018-07-24 12:17:02,968 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:02,969 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-07-24 12:17:02,969 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash 568841915, now seen corresponding path program 1 times [2018-07-24 12:17:02,969 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:02,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:02,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:02,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:02,971 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:03,871 WARN L169 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:17:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 535 proven. 87 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-07-24 12:17:05,416 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:05,416 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 12:17:05,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:05,424 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:05,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 525 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-07-24 12:17:06,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 112 proven. 485 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-07-24 12:17:07,400 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:17:07,401 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 12:17:07,401 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:17:07,401 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:17:07,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:17:07,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:17:07,402 INFO L87 Difference]: Start difference. First operand 16358 states and 19733 transitions. Second operand 5 states. [2018-07-24 12:17:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:13,601 INFO L93 Difference]: Finished difference Result 38551 states and 46899 transitions. [2018-07-24 12:17:13,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:17:13,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 785 [2018-07-24 12:17:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:13,671 INFO L225 Difference]: With dead ends: 38551 [2018-07-24 12:17:13,671 INFO L226 Difference]: Without dead ends: 22199 [2018-07-24 12:17:13,739 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1566 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:17:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22199 states. [2018-07-24 12:17:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22199 to 20607. [2018-07-24 12:17:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20607 states. [2018-07-24 12:17:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20607 states to 20607 states and 24491 transitions. [2018-07-24 12:17:14,146 INFO L78 Accepts]: Start accepts. Automaton has 20607 states and 24491 transitions. Word has length 785 [2018-07-24 12:17:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:14,146 INFO L471 AbstractCegarLoop]: Abstraction has 20607 states and 24491 transitions. [2018-07-24 12:17:14,146 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:17:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 20607 states and 24491 transitions. [2018-07-24 12:17:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-07-24 12:17:14,196 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:14,197 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, 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, 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, 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] [2018-07-24 12:17:14,197 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:14,197 INFO L82 PathProgramCache]: Analyzing trace with hash 513148696, now seen corresponding path program 1 times [2018-07-24 12:17:14,197 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:14,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:14,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:14,198 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:14,619 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:17:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 245 proven. 493 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2018-07-24 12:17:16,401 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:16,401 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:16,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:16,409 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:16,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:17,638 WARN L169 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 12:17:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 915 proven. 2 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-07-24 12:17:18,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 245 proven. 493 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2018-07-24 12:17:20,089 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:20,089 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 8 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 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:20,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:20,109 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:20,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 915 proven. 2 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-07-24 12:17:21,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 245 proven. 493 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2018-07-24 12:17:23,409 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:23,410 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 8, 5] total 30 [2018-07-24 12:17:23,410 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:23,412 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 12:17:23,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 12:17:23,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:17:23,413 INFO L87 Difference]: Start difference. First operand 20607 states and 24491 transitions. Second operand 20 states. [2018-07-24 12:17:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:17:39,191 INFO L93 Difference]: Finished difference Result 42008 states and 50261 transitions. [2018-07-24 12:17:39,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:17:39,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 877 [2018-07-24 12:17:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:17:39,257 INFO L225 Difference]: With dead ends: 42008 [2018-07-24 12:17:39,258 INFO L226 Difference]: Without dead ends: 21078 [2018-07-24 12:17:39,333 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3582 GetRequests, 3517 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=934, Invalid=3226, Unknown=0, NotChecked=0, Total=4160 [2018-07-24 12:17:39,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21078 states. [2018-07-24 12:17:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21078 to 19521. [2018-07-24 12:17:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19521 states. [2018-07-24 12:17:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19521 states to 19521 states and 21534 transitions. [2018-07-24 12:17:39,686 INFO L78 Accepts]: Start accepts. Automaton has 19521 states and 21534 transitions. Word has length 877 [2018-07-24 12:17:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:17:39,687 INFO L471 AbstractCegarLoop]: Abstraction has 19521 states and 21534 transitions. [2018-07-24 12:17:39,687 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 12:17:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 19521 states and 21534 transitions. [2018-07-24 12:17:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2018-07-24 12:17:39,739 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:17:39,739 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:17:39,740 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:17:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2012229876, now seen corresponding path program 1 times [2018-07-24 12:17:39,741 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:17:39,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:39,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:39,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:17:39,743 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:17:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1101 proven. 145 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2018-07-24 12:17:41,924 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:41,924 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:17:41,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:41,932 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:42,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:43,129 WARN L169 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-07-24 12:17:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1332 proven. 6 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2018-07-24 12:17:44,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 189 proven. 1245 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-07-24 12:17:47,372 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:17:47,373 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:17:47,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:17:47,393 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:17:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:17:48,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:17:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1091 proven. 6 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2018-07-24 12:17:49,630 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:17:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 191 proven. 1243 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-07-24 12:17:55,124 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:17:55,125 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8, 7, 8] total 35 [2018-07-24 12:17:55,125 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:17:55,127 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 12:17:55,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 12:17:55,127 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2018-07-24 12:17:55,127 INFO L87 Difference]: Start difference. First operand 19521 states and 21534 transitions. Second operand 20 states. [2018-07-24 12:18:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:26,528 INFO L93 Difference]: Finished difference Result 53919 states and 63788 transitions. [2018-07-24 12:18:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-24 12:18:26,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1052 [2018-07-24 12:18:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:26,686 INFO L225 Difference]: With dead ends: 53919 [2018-07-24 12:18:26,686 INFO L226 Difference]: Without dead ends: 36037 [2018-07-24 12:18:26,830 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4322 GetRequests, 4231 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1041, Invalid=7149, Unknown=0, NotChecked=0, Total=8190 [2018-07-24 12:18:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36037 states. [2018-07-24 12:18:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36037 to 31378. [2018-07-24 12:18:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31378 states. [2018-07-24 12:18:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31378 states to 31378 states and 34886 transitions. [2018-07-24 12:18:27,595 INFO L78 Accepts]: Start accepts. Automaton has 31378 states and 34886 transitions. Word has length 1052 [2018-07-24 12:18:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:27,596 INFO L471 AbstractCegarLoop]: Abstraction has 31378 states and 34886 transitions. [2018-07-24 12:18:27,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 12:18:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31378 states and 34886 transitions. [2018-07-24 12:18:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1251 [2018-07-24 12:18:27,733 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:27,734 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:18:27,735 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 12:18:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash 159283283, now seen corresponding path program 1 times [2018-07-24 12:18:27,735 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:27,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:27,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:27,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 1581 proven. 6 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2018-07-24 12:18:29,215 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:29,215 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:18:29,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:29,224 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:29,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 1100 proven. 2 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2018-07-24 12:18:30,242 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 1100 proven. 2 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2018-07-24 12:18:31,396 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:31,397 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:18:31,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:31,412 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:32,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 1581 proven. 6 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2018-07-24 12:18:33,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 1583 proven. 4 refuted. 0 times theorem prover too weak. 1252 trivial. 0 not checked. [2018-07-24 12:18:34,399 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:34,400 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:18:34,400 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:34,401 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:18:34,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:18:34,402 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:18:34,402 INFO L87 Difference]: Start difference. First operand 31378 states and 34886 transitions. Second operand 9 states. [2018-07-24 12:18:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:18:39,715 INFO L93 Difference]: Finished difference Result 71830 states and 82047 transitions. [2018-07-24 12:18:39,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:18:39,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1250 [2018-07-24 12:18:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:18:40,032 INFO L225 Difference]: With dead ends: 71830 [2018-07-24 12:18:40,032 INFO L226 Difference]: Without dead ends: 29640 [2018-07-24 12:18:40,237 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5024 GetRequests, 4999 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:18:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29640 states. [2018-07-24 12:18:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29640 to 28314. [2018-07-24 12:18:41,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28314 states. [2018-07-24 12:18:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28314 states to 28314 states and 31373 transitions. [2018-07-24 12:18:41,351 INFO L78 Accepts]: Start accepts. Automaton has 28314 states and 31373 transitions. Word has length 1250 [2018-07-24 12:18:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:18:41,352 INFO L471 AbstractCegarLoop]: Abstraction has 28314 states and 31373 transitions. [2018-07-24 12:18:41,352 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:18:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28314 states and 31373 transitions. [2018-07-24 12:18:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1755 [2018-07-24 12:18:41,558 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:18:41,559 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, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:18:41,559 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 12:18:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -175451490, now seen corresponding path program 1 times [2018-07-24 12:18:41,560 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:18:41,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:41,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:41,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:18:41,562 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:18:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 1150 proven. 525 refuted. 0 times theorem prover too weak. 3159 trivial. 0 not checked. [2018-07-24 12:18:46,841 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:46,841 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:18:46,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:46,849 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:47,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 2223 proven. 2 refuted. 0 times theorem prover too weak. 2609 trivial. 0 not checked. [2018-07-24 12:18:49,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 255 proven. 2114 refuted. 0 times theorem prover too weak. 2465 trivial. 0 not checked. [2018-07-24 12:18:53,168 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:18:53,168 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:18:53,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:18:53,185 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:18:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:18:54,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:18:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 3290 proven. 25 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2018-07-24 12:18:55,751 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:18:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4834 backedges. 1150 proven. 525 refuted. 0 times theorem prover too weak. 3159 trivial. 0 not checked. [2018-07-24 12:18:57,889 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:18:57,892 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 5, 5] total 27 [2018-07-24 12:18:57,892 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:18:57,894 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:18:57,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:18:57,895 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2018-07-24 12:18:57,896 INFO L87 Difference]: Start difference. First operand 28314 states and 31373 transitions. Second operand 17 states. [2018-07-24 12:19:11,964 WARN L169 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2018-07-24 12:19:12,345 WARN L169 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2018-07-24 12:19:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:12,992 INFO L93 Difference]: Finished difference Result 58323 states and 64773 transitions. [2018-07-24 12:19:12,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-07-24 12:19:12,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1754 [2018-07-24 12:19:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:13,232 INFO L225 Difference]: With dead ends: 58323 [2018-07-24 12:19:13,232 INFO L226 Difference]: Without dead ends: 31033 [2018-07-24 12:19:13,497 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7078 GetRequests, 7020 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=659, Invalid=2763, Unknown=0, NotChecked=0, Total=3422 [2018-07-24 12:19:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31033 states. [2018-07-24 12:19:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31033 to 28301. [2018-07-24 12:19:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28301 states. [2018-07-24 12:19:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28301 states to 28301 states and 31319 transitions. [2018-07-24 12:19:14,054 INFO L78 Accepts]: Start accepts. Automaton has 28301 states and 31319 transitions. Word has length 1754 [2018-07-24 12:19:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:14,055 INFO L471 AbstractCegarLoop]: Abstraction has 28301 states and 31319 transitions. [2018-07-24 12:19:14,055 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:19:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28301 states and 31319 transitions. [2018-07-24 12:19:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1858 [2018-07-24 12:19:14,216 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:14,217 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, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:14,218 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 12:19:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1710013196, now seen corresponding path program 1 times [2018-07-24 12:19:14,218 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:14,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:14,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:14,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:14,219 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 757 proven. 454 refuted. 0 times theorem prover too weak. 4538 trivial. 0 not checked. [2018-07-24 12:19:16,753 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:16,754 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 12:19:16,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:16,765 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:17,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 3595 proven. 2 refuted. 0 times theorem prover too weak. 2152 trivial. 0 not checked. [2018-07-24 12:19:18,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 757 proven. 454 refuted. 0 times theorem prover too weak. 4538 trivial. 0 not checked. [2018-07-24 12:19:20,188 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:20,188 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:20,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:20,206 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:21,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 3595 proven. 2 refuted. 0 times theorem prover too weak. 2152 trivial. 0 not checked. [2018-07-24 12:19:22,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5749 backedges. 757 proven. 454 refuted. 0 times theorem prover too weak. 4538 trivial. 0 not checked. [2018-07-24 12:19:24,015 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:19:24,017 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-07-24 12:19:24,017 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:19:24,018 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:19:24,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:19:24,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-07-24 12:19:24,019 INFO L87 Difference]: Start difference. First operand 28301 states and 31319 transitions. Second operand 9 states. [2018-07-24 12:19:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:19:29,073 INFO L93 Difference]: Finished difference Result 51922 states and 56853 transitions. [2018-07-24 12:19:29,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-07-24 12:19:29,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1857 [2018-07-24 12:19:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:19:29,138 INFO L225 Difference]: With dead ends: 51922 [2018-07-24 12:19:29,138 INFO L226 Difference]: Without dead ends: 24645 [2018-07-24 12:19:29,259 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 7444 GetRequests, 7425 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-07-24 12:19:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24645 states. [2018-07-24 12:19:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24645 to 24430. [2018-07-24 12:19:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24430 states. [2018-07-24 12:19:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24430 states to 24430 states and 25666 transitions. [2018-07-24 12:19:29,623 INFO L78 Accepts]: Start accepts. Automaton has 24430 states and 25666 transitions. Word has length 1857 [2018-07-24 12:19:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:19:29,624 INFO L471 AbstractCegarLoop]: Abstraction has 24430 states and 25666 transitions. [2018-07-24 12:19:29,624 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:19:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 24430 states and 25666 transitions. [2018-07-24 12:19:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1859 [2018-07-24 12:19:29,694 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:19:29,695 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, 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, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:29,695 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 12:19:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1994174753, now seen corresponding path program 1 times [2018-07-24 12:19:29,695 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:19:29,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:29,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:29,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:19:29,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:19:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:31,380 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:19:32,325 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:19:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5757 backedges. 2487 proven. 1233 refuted. 0 times theorem prover too weak. 2037 trivial. 0 not checked. [2018-07-24 12:19:37,392 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:37,392 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 12:19:37,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:37,400 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:37,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5757 backedges. 2963 proven. 2 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2018-07-24 12:19:39,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:19:39,650 WARN L169 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-07-24 12:19:39,803 WARN L169 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-07-24 12:19:40,334 WARN L169 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-07-24 12:19:40,528 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 Received shutdown request... [2018-07-24 12:19:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5757 backedges. 1528 proven. 254 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2018-07-24 12:19:43,353 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:19:43,353 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 12:19:43,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:19:43,369 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:19:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:19:44,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:19:44,660 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-07-24 12:19:44,861 WARN L512 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:19:44,862 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:19:44,867 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:19:44,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:19:44 BoogieIcfgContainer [2018-07-24 12:19:44,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:19:44,868 INFO L168 Benchmark]: Toolchain (without parser) took 232926.99 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: -521.2 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,869 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:19:44,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1177.29 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: 108.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,870 INFO L168 Benchmark]: Boogie Procedure Inliner took 208.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,871 INFO L168 Benchmark]: Boogie Preprocessor took 487.28 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 832.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -983.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,872 INFO L168 Benchmark]: RCFGBuilder took 6195.55 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 276.4 MB). Peak memory consumption was 276.4 MB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,872 INFO L168 Benchmark]: TraceAbstraction took 224853.22 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 56.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-07-24 12:19:44,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1177.29 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: 108.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 208.58 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 487.28 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 832.0 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -983.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6195.55 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 276.4 MB). Peak memory consumption was 276.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224853.22 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 56.5 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: 91]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 91). Cancelled while BasicCegarLoop was analyzing trace of length 1859 with TraceHistMax 10, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 224.7s OverallTime, 16 OverallIterations, 10 TraceHistogramMax, 128.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2160 SDtfs, 41467 SDslu, 4186 SDs, 0 SdLazy, 83760 SolverSat, 10158 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 98.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33732 GetRequests, 33375 SyntacticMatches, 32 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31378occurred in iteration=12, 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: 5.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 12282 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 53.4s InterpolantComputationTime, 26899 NumberOfCodeBlocks, 26899 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 43524 ConstructedInterpolants, 0 QuantifiedInterpolants, 198932328 SizeOfPredicates, 24 NumberOfNonLiveVariables, 21894 ConjunctsInSsa, 194 ConjunctsInUnsatCore, 45 InterpolantComputations, 10 PerfectInterpolantSequences, 83656/94711 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_label04_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-19-44-892.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label04_false-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-19-44-892.csv Completed graceful shutdown