java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:15:55,963 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:15:55,965 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:15:55,977 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:15:55,978 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:15:55,980 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:15:55,981 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:15:55,984 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:15:55,986 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:15:55,987 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:15:55,991 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:15:55,992 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:15:55,993 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:15:55,994 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:15:55,995 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:15:55,999 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:15:56,000 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:15:56,008 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:15:56,010 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:15:56,013 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:15:56,014 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:15:56,016 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:15:56,019 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-08-07 12:15:56,032 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 [2018-08-07 12:15:56,057 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:15:56,058 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:15:56,059 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:15:56,059 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:15:56,059 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:15:56,059 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:15:56,059 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:15:56,060 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:15:56,060 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:15:56,060 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:15:56,060 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:15:56,061 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:15:56,061 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:15:56,061 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:15:56,061 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:15:56,062 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:15:56,062 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:15:56,062 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:15:56,062 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:15:56,062 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:15:56,063 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:15:56,063 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:15:56,063 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:15:56,063 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:15:56,063 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:15:56,064 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:15:56,065 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:15:56,065 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:15:56,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:15:56,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:15:56,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:15:56,130 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:15:56,130 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:15:56,131 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-08-07 12:15:56,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d2b2775/a5907207cd9b4cd29ef4850da99352d7/FLAG968dc8100 [2018-08-07 12:15:56,853 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:15:56,853 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54_true-unreach-call.c [2018-08-07 12:15:56,872 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d2b2775/a5907207cd9b4cd29ef4850da99352d7/FLAG968dc8100 [2018-08-07 12:15:56,889 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95d2b2775/a5907207cd9b4cd29ef4850da99352d7 [2018-08-07 12:15:56,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:15:56,902 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:15:56,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:15:56,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:15:56,911 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:15:56,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:15:56" (1/1) ... [2018-08-07 12:15:56,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319e9e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:56, skipping insertion in model container [2018-08-07 12:15:56,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:15:56" (1/1) ... [2018-08-07 12:15:57,141 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:15:57,565 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:15:57,582 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:15:57,795 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:15:57,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57 WrapperNode [2018-08-07 12:15:57,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:15:57,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:15:57,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:15:57,879 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:15:57,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:57,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:15:58,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:15:58,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:15:58,044 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:15:58,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (1/1) ... [2018-08-07 12:15:58,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:15:58,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:15:58,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:15:58,446 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:15:58,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (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 [2018-08-07 12:15:58,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:15:58,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:15:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:15:58,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-08-07 12:15:58,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:15:58,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:15:58,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:15:58,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:16:03,904 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:16:03,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:16:03 BoogieIcfgContainer [2018-08-07 12:16:03,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:16:03,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:16:03,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:16:03,910 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:16:03,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:15:56" (1/3) ... [2018-08-07 12:16:03,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5da77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:16:03, skipping insertion in model container [2018-08-07 12:16:03,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:15:57" (2/3) ... [2018-08-07 12:16:03,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be5da77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:16:03, skipping insertion in model container [2018-08-07 12:16:03,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:16:03" (3/3) ... [2018-08-07 12:16:03,916 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label54_true-unreach-call.c [2018-08-07 12:16:03,928 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:16:03,946 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:16:04,016 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:16:04,017 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:16:04,017 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:16:04,017 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:16:04,017 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:16:04,018 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:16:04,018 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:16:04,018 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:16:04,018 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:16:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-08-07 12:16:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-08-07 12:16:04,054 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:04,056 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:04,057 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash -639357604, now seen corresponding path program 1 times [2018-08-07 12:16:04,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:04,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:04,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:04,117 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:04,572 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:04,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:16:04,573 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:04,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:16:04,592 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:16:04,593 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:16:04,595 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-08-07 12:16:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:07,972 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-08-07 12:16:07,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:16:07,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2018-08-07 12:16:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:08,001 INFO L225 Difference]: With dead ends: 979 [2018-08-07 12:16:08,001 INFO L226 Difference]: Without dead ends: 680 [2018-08-07 12:16:08,012 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:16:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-08-07 12:16:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-08-07 12:16:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-08-07 12:16:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-08-07 12:16:08,101 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 44 [2018-08-07 12:16:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:08,101 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-08-07 12:16:08,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:16:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-08-07 12:16:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-08-07 12:16:08,108 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:08,108 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:08,109 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1151248341, now seen corresponding path program 1 times [2018-08-07 12:16:08,109 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:08,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:08,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:08,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:08,111 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:08,489 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:08,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:16:08,490 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:08,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:16:08,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:16:08,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:16:08,493 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-08-07 12:16:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:14,484 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-08-07 12:16:14,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:16:14,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-08-07 12:16:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:14,506 INFO L225 Difference]: With dead ends: 1555 [2018-08-07 12:16:14,506 INFO L226 Difference]: Without dead ends: 1077 [2018-08-07 12:16:14,510 INFO L603 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 [2018-08-07 12:16:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-08-07 12:16:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-08-07 12:16:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-08-07 12:16:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-08-07 12:16:14,568 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 117 [2018-08-07 12:16:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:14,569 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-08-07 12:16:14,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:16:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-08-07 12:16:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-08-07 12:16:14,573 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:14,573 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:14,574 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash 731087552, now seen corresponding path program 1 times [2018-08-07 12:16:14,574 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:14,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:14,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:14,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:14,576 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:14,919 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:14,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-08-07 12:16:14,919 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:14,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:16:14,920 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:16:14,920 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:16:14,920 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 7 states. [2018-08-07 12:16:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:21,815 INFO L93 Difference]: Finished difference Result 2979 states and 4525 transitions. [2018-08-07 12:16:21,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-08-07 12:16:21,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2018-08-07 12:16:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:21,830 INFO L225 Difference]: With dead ends: 2979 [2018-08-07 12:16:21,831 INFO L226 Difference]: Without dead ends: 1922 [2018-08-07 12:16:21,837 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:16:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2018-08-07 12:16:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1813. [2018-08-07 12:16:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2018-08-07 12:16:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2564 transitions. [2018-08-07 12:16:21,909 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2564 transitions. Word has length 118 [2018-08-07 12:16:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:21,910 INFO L480 AbstractCegarLoop]: Abstraction has 1813 states and 2564 transitions. [2018-08-07 12:16:21,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:16:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2564 transitions. [2018-08-07 12:16:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-08-07 12:16:21,914 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:21,915 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:16:21,915 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:21,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1842858103, now seen corresponding path program 1 times [2018-08-07 12:16:21,915 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:21,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:21,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:21,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:21,917 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:22,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:16:22,353 INFO L194 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 [2018-08-07 12:16:22,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:22,363 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:16:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:22,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:16:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:22,750 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:16:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:23,387 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:16:23,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-08-07 12:16:23,387 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:23,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:16:23,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:16:23,388 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:16:23,389 INFO L87 Difference]: Start difference. First operand 1813 states and 2564 transitions. Second operand 3 states. [2018-08-07 12:16:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:25,749 INFO L93 Difference]: Finished difference Result 4033 states and 5956 transitions. [2018-08-07 12:16:25,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:16:25,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2018-08-07 12:16:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:25,764 INFO L225 Difference]: With dead ends: 4033 [2018-08-07 12:16:25,764 INFO L226 Difference]: Without dead ends: 2226 [2018-08-07 12:16:25,771 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:16:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2018-08-07 12:16:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2217. [2018-08-07 12:16:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2018-08-07 12:16:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3161 transitions. [2018-08-07 12:16:25,839 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3161 transitions. Word has length 176 [2018-08-07 12:16:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:25,840 INFO L480 AbstractCegarLoop]: Abstraction has 2217 states and 3161 transitions. [2018-08-07 12:16:25,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:16:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3161 transitions. [2018-08-07 12:16:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-08-07 12:16:25,845 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:25,845 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:16:25,845 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1021024169, now seen corresponding path program 1 times [2018-08-07 12:16:25,846 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:25,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:25,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:25,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:25,847 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:16:26,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:16:26,449 INFO L194 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 [2018-08-07 12:16:26,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:26,457 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:16:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:26,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:16:28,688 WARN L1032 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_1 Int)) (let ((.cse1 (* 9 v_prenex_1))) (let ((.cse2 (div .cse1 10))) (let ((.cse0 (mod (+ .cse2 30) 90))) (and (not (= 0 .cse0)) (not (= (mod .cse1 10) 0)) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse0) (< .cse1 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_1) (< (+ .cse2 58980) 0)))))) (exists ((v_prenex_3 Int)) (let ((.cse4 (* 9 v_prenex_3))) (let ((.cse3 (div .cse4 10))) (and (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_3) (<= 0 (+ .cse3 58979)) (<= 0 .cse4) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse3 29) 90) 48)))))) (exists ((v_prenex_2 Int)) (let ((.cse6 (* 9 v_prenex_2))) (let ((.cse7 (div .cse6 10))) (let ((.cse5 (mod (+ .cse7 29) 90))) (and (not (= .cse5 0)) (= (mod .cse6 10) 0) (< (+ .cse7 58979) 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_2) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse5)))))) (exists ((v_prenex_4 Int)) (let ((.cse9 (* 9 v_prenex_4))) (let ((.cse8 (mod (+ (div .cse9 10) 29) 90))) (and (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse8 48)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_4) (= .cse8 0) (= (mod .cse9 10) 0))))) (exists ((v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486 Int)) (let ((.cse10 (* 9 v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486))) (let ((.cse11 (mod (+ (div .cse10 10) 29) 90))) (and (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0_486) (<= 0 .cse10) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse11 48)) (= .cse11 0))))) (exists ((v_prenex_5 Int)) (let ((.cse13 (* 9 v_prenex_5))) (let ((.cse12 (div .cse13 10))) (and (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse12 29) 90) 48)) (<= 0 (+ .cse12 58979)) (= (mod .cse13 10) 0) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_5))))) (exists ((v_prenex_7 Int)) (let ((.cse14 (* 9 v_prenex_7))) (let ((.cse15 (div .cse14 10))) (let ((.cse16 (mod (+ .cse15 29) 90))) (and (<= 0 .cse14) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_7) (< (+ .cse15 58979) 0) (<= (+ c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 42) .cse16) (not (= .cse16 0))))))) (exists ((v_prenex_6 Int)) (let ((.cse17 (* 9 v_prenex_6))) (let ((.cse18 (mod (+ (div .cse17 10) 30) 90))) (and (< .cse17 0) (not (= (mod .cse17 10) 0)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_6) (= 0 .cse18) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ .cse18 48)))))) (exists ((v_prenex_8 Int)) (let ((.cse19 (* 9 v_prenex_8))) (let ((.cse20 (div .cse19 10))) (and (not (= (mod .cse19 10) 0)) (<= 0 (+ .cse20 58980)) (<= c_~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0 (+ (mod (+ .cse20 30) 90) 48)) (<= |c_old(~__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__a23~0)| v_prenex_8) (< .cse19 0)))))) is different from true [2018-08-07 12:16:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 71 trivial. 2 not checked. [2018-08-07 12:16:30,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:16:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-08-07 12:16:30,647 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:16:30,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-08-07 12:16:30,648 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:30,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:16:30,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:16:30,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-08-07 12:16:30,650 INFO L87 Difference]: Start difference. First operand 2217 states and 3161 transitions. Second operand 3 states. [2018-08-07 12:16:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:32,347 INFO L93 Difference]: Finished difference Result 5467 states and 8136 transitions. [2018-08-07 12:16:32,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:16:32,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2018-08-07 12:16:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:32,366 INFO L225 Difference]: With dead ends: 5467 [2018-08-07 12:16:32,366 INFO L226 Difference]: Without dead ends: 3256 [2018-08-07 12:16:32,377 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 468 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2018-08-07 12:16:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2018-08-07 12:16:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 3222. [2018-08-07 12:16:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3222 states. [2018-08-07 12:16:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 4674 transitions. [2018-08-07 12:16:32,455 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 4674 transitions. Word has length 235 [2018-08-07 12:16:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:32,455 INFO L480 AbstractCegarLoop]: Abstraction has 3222 states and 4674 transitions. [2018-08-07 12:16:32,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:16:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 4674 transitions. [2018-08-07 12:16:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-08-07 12:16:32,461 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:32,462 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:16:32,462 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1339442454, now seen corresponding path program 1 times [2018-08-07 12:16:32,463 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:32,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:32,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:32,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:32,464 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-08-07 12:16:32,677 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:16:32,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:16:32,677 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:16:32,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:16:32,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:16:32,678 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:16:32,679 INFO L87 Difference]: Start difference. First operand 3222 states and 4674 transitions. Second operand 4 states. [2018-08-07 12:16:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:16:36,862 INFO L93 Difference]: Finished difference Result 9041 states and 13700 transitions. [2018-08-07 12:16:36,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:16:36,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 256 [2018-08-07 12:16:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:16:36,894 INFO L225 Difference]: With dead ends: 9041 [2018-08-07 12:16:36,894 INFO L226 Difference]: Without dead ends: 5825 [2018-08-07 12:16:36,912 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:16:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5825 states. [2018-08-07 12:16:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5825 to 5493. [2018-08-07 12:16:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5493 states. [2018-08-07 12:16:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 7977 transitions. [2018-08-07 12:16:37,052 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 7977 transitions. Word has length 256 [2018-08-07 12:16:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:16:37,053 INFO L480 AbstractCegarLoop]: Abstraction has 5493 states and 7977 transitions. [2018-08-07 12:16:37,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:16:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 7977 transitions. [2018-08-07 12:16:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-08-07 12:16:37,062 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:16:37,062 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:16:37,063 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:16:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1846592885, now seen corresponding path program 1 times [2018-08-07 12:16:37,063 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:16:37,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:37,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:37,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:16:37,071 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:16:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-08-07 12:16:37,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:16:37,429 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:16:37,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:37,437 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:16:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:37,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:16:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:37,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:16:37,864 WARN L170 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-08-07 12:16:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:38,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:16:38,353 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:16:38,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:16:38,369 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:16:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:16:38,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:16:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:38,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:16:38,786 WARN L170 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-08-07 12:16:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:16:39,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:16:39,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 5, 5] total 14 [2018-08-07 12:16:39,271 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:16:39,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-08-07 12:16:39,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-08-07 12:16:39,272 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:16:39,272 INFO L87 Difference]: Start difference. First operand 5493 states and 7977 transitions. Second operand 12 states. [2018-08-07 12:17:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:01,526 INFO L93 Difference]: Finished difference Result 21559 states and 34598 transitions. [2018-08-07 12:17:01,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-08-07 12:17:01,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 258 [2018-08-07 12:17:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:01,609 INFO L225 Difference]: With dead ends: 21559 [2018-08-07 12:17:01,610 INFO L226 Difference]: Without dead ends: 16072 [2018-08-07 12:17:01,656 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1057 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=938, Invalid=5542, Unknown=0, NotChecked=0, Total=6480 [2018-08-07 12:17:01,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16072 states. [2018-08-07 12:17:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16072 to 14912. [2018-08-07 12:17:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14912 states. [2018-08-07 12:17:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14912 states to 14912 states and 20864 transitions. [2018-08-07 12:17:02,161 INFO L78 Accepts]: Start accepts. Automaton has 14912 states and 20864 transitions. Word has length 258 [2018-08-07 12:17:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:02,162 INFO L480 AbstractCegarLoop]: Abstraction has 14912 states and 20864 transitions. [2018-08-07 12:17:02,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-08-07 12:17:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14912 states and 20864 transitions. [2018-08-07 12:17:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-08-07 12:17:02,179 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:02,180 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:17:02,180 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1355614083, now seen corresponding path program 1 times [2018-08-07 12:17:02,181 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:02,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:02,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:02,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:02,182 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-08-07 12:17:02,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:02,803 INFO L194 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 [2018-08-07 12:17:02,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:02,812 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:02,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:06,049 WARN L170 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 17 [2018-08-07 12:17:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-08-07 12:17:06,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-08-07 12:17:06,349 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:17:06,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-08-07 12:17:06,349 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:06,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:17:06,350 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:17:06,350 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-08-07 12:17:06,351 INFO L87 Difference]: Start difference. First operand 14912 states and 20864 transitions. Second operand 3 states. [2018-08-07 12:17:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:08,078 INFO L93 Difference]: Finished difference Result 38208 states and 56498 transitions. [2018-08-07 12:17:08,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:17:08,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 289 [2018-08-07 12:17:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:08,177 INFO L225 Difference]: With dead ends: 38208 [2018-08-07 12:17:08,177 INFO L226 Difference]: Without dead ends: 23682 [2018-08-07 12:17:08,223 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2018-08-07 12:17:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23682 states. [2018-08-07 12:17:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23682 to 23206. [2018-08-07 12:17:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23206 states. [2018-08-07 12:17:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 32947 transitions. [2018-08-07 12:17:08,872 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 32947 transitions. Word has length 289 [2018-08-07 12:17:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:08,873 INFO L480 AbstractCegarLoop]: Abstraction has 23206 states and 32947 transitions. [2018-08-07 12:17:08,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:17:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 32947 transitions. [2018-08-07 12:17:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-08-07 12:17:08,940 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:08,940 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:17:08,940 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1994193760, now seen corresponding path program 1 times [2018-08-07 12:17:08,941 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:08,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:08,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:08,943 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-08-07 12:17:10,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:10,121 INFO L194 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 [2018-08-07 12:17:10,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:10,136 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:10,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-08-07 12:17:10,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2018-08-07 12:17:11,170 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:17:11,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-08-07 12:17:11,170 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:17:11,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:17:11,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:17:11,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:17:11,171 INFO L87 Difference]: Start difference. First operand 23206 states and 32947 transitions. Second operand 6 states. [2018-08-07 12:17:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:14,615 INFO L93 Difference]: Finished difference Result 45838 states and 66446 transitions. [2018-08-07 12:17:14,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-08-07 12:17:14,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 337 [2018-08-07 12:17:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:14,724 INFO L225 Difference]: With dead ends: 45838 [2018-08-07 12:17:14,724 INFO L226 Difference]: Without dead ends: 29106 [2018-08-07 12:17:14,772 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 673 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-08-07 12:17:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29106 states. [2018-08-07 12:17:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29106 to 28336. [2018-08-07 12:17:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28336 states. [2018-08-07 12:17:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28336 states to 28336 states and 40563 transitions. [2018-08-07 12:17:15,584 INFO L78 Accepts]: Start accepts. Automaton has 28336 states and 40563 transitions. Word has length 337 [2018-08-07 12:17:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:15,585 INFO L480 AbstractCegarLoop]: Abstraction has 28336 states and 40563 transitions. [2018-08-07 12:17:15,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:17:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28336 states and 40563 transitions. [2018-08-07 12:17:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-08-07 12:17:15,713 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:15,714 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:17:15,714 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701310, now seen corresponding path program 1 times [2018-08-07 12:17:15,715 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:15,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:15,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:15,716 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 326 proven. 99 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-08-07 12:17:16,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:16,567 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:16,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:16,576 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:16,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-08-07 12:17:16,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:17,128 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-08-07 12:17:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-08-07 12:17:17,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:17,810 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:17:17,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:17,831 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:18,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 113 proven. 219 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-08-07 12:17:18,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:18,834 WARN L170 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-08-07 12:17:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 328 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-08-07 12:17:19,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:17:19,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 8] total 12 [2018-08-07 12:17:19,115 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:17:19,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:17:19,116 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:17:19,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:17:19,117 INFO L87 Difference]: Start difference. First operand 28336 states and 40563 transitions. Second operand 6 states. [2018-08-07 12:17:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:21,744 INFO L93 Difference]: Finished difference Result 55195 states and 81896 transitions. [2018-08-07 12:17:21,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:17:21,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 428 [2018-08-07 12:17:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:21,840 INFO L225 Difference]: With dead ends: 55195 [2018-08-07 12:17:21,840 INFO L226 Difference]: Without dead ends: 25047 [2018-08-07 12:17:21,921 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1704 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:17:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25047 states. [2018-08-07 12:17:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25047 to 22474. [2018-08-07 12:17:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22474 states. [2018-08-07 12:17:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22474 states to 22474 states and 28864 transitions. [2018-08-07 12:17:22,426 INFO L78 Accepts]: Start accepts. Automaton has 22474 states and 28864 transitions. Word has length 428 [2018-08-07 12:17:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:22,427 INFO L480 AbstractCegarLoop]: Abstraction has 22474 states and 28864 transitions. [2018-08-07 12:17:22,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:17:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22474 states and 28864 transitions. [2018-08-07 12:17:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-08-07 12:17:22,488 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:22,489 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:17:22,489 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1133682667, now seen corresponding path program 1 times [2018-08-07 12:17:22,490 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:22,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:22,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:22,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:22,491 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:24,003 WARN L170 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-08-07 12:17:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 507 proven. 263 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-08-07 12:17:24,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:24,714 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:24,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:24,722 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:24,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-08-07 12:17:25,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 107 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-08-07 12:17:26,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:26,067 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:17:26,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:26,084 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:26,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:17:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2018-08-07 12:17:27,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:17:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 375 proven. 107 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-08-07 12:17:27,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:17:27,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 5, 5] total 24 [2018-08-07 12:17:27,753 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:17:27,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-08-07 12:17:27,754 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-08-07 12:17:27,754 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2018-08-07 12:17:27,754 INFO L87 Difference]: Start difference. First operand 22474 states and 28864 transitions. Second operand 19 states. [2018-08-07 12:17:39,362 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-08-07 12:17:49,646 WARN L170 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-08-07 12:17:51,313 WARN L170 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2018-08-07 12:17:52,676 WARN L170 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-08-07 12:17:55,444 WARN L170 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-08-07 12:17:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:17:57,754 INFO L93 Difference]: Finished difference Result 54214 states and 76092 transitions. [2018-08-07 12:17:57,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-08-07 12:17:57,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 588 [2018-08-07 12:17:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:17:57,909 INFO L225 Difference]: With dead ends: 54214 [2018-08-07 12:17:57,909 INFO L226 Difference]: Without dead ends: 32126 [2018-08-07 12:17:57,979 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2582 GetRequests, 2433 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8496 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=3486, Invalid=18270, Unknown=0, NotChecked=0, Total=21756 [2018-08-07 12:17:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32126 states. [2018-08-07 12:17:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32126 to 29812. [2018-08-07 12:17:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29812 states. [2018-08-07 12:17:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29812 states to 29812 states and 36651 transitions. [2018-08-07 12:17:58,659 INFO L78 Accepts]: Start accepts. Automaton has 29812 states and 36651 transitions. Word has length 588 [2018-08-07 12:17:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:17:58,660 INFO L480 AbstractCegarLoop]: Abstraction has 29812 states and 36651 transitions. [2018-08-07 12:17:58,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-08-07 12:17:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 29812 states and 36651 transitions. [2018-08-07 12:17:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2018-08-07 12:17:58,724 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:17:58,724 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-08-07 12:17:58,725 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:17:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1429869890, now seen corresponding path program 1 times [2018-08-07 12:17:58,725 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:17:58,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:58,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:58,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:17:58,726 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:17:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 444 proven. 207 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-08-07 12:17:59,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:17:59,294 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:17:59,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:17:59,302 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:17:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:17:59,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 881 proven. 2 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2018-08-07 12:18:00,023 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 474 proven. 89 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2018-08-07 12:18:00,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:00,376 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:18:00,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:00,393 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:00,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 988 proven. 2 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-08-07 12:18:01,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 444 proven. 207 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2018-08-07 12:18:01,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:01,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 14 [2018-08-07 12:18:01,473 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:01,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-08-07 12:18:01,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-08-07 12:18:01,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-08-07 12:18:01,474 INFO L87 Difference]: Start difference. First operand 29812 states and 36651 transitions. Second operand 8 states. [2018-08-07 12:18:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:18:10,274 INFO L93 Difference]: Finished difference Result 63997 states and 78888 transitions. [2018-08-07 12:18:10,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-08-07 12:18:10,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 649 [2018-08-07 12:18:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:18:10,361 INFO L225 Difference]: With dead ends: 63997 [2018-08-07 12:18:10,361 INFO L226 Difference]: Without dead ends: 34380 [2018-08-07 12:18:10,413 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2642 GetRequests, 2605 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2018-08-07 12:18:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34380 states. [2018-08-07 12:18:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34380 to 31298. [2018-08-07 12:18:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31298 states. [2018-08-07 12:18:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31298 states to 31298 states and 37549 transitions. [2018-08-07 12:18:10,961 INFO L78 Accepts]: Start accepts. Automaton has 31298 states and 37549 transitions. Word has length 649 [2018-08-07 12:18:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:18:10,962 INFO L480 AbstractCegarLoop]: Abstraction has 31298 states and 37549 transitions. [2018-08-07 12:18:10,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-08-07 12:18:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31298 states and 37549 transitions. [2018-08-07 12:18:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2018-08-07 12:18:10,997 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:18:10,998 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:18:10,998 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:18:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash 49717103, now seen corresponding path program 1 times [2018-08-07 12:18:10,999 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:18:10,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:11,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:11,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:11,000 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:18:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:11,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:11,711 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:18:11,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:11,725 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:11,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 925 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-08-07 12:18:12,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:12,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:12,952 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:18:12,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:12,968 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:13,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 925 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-08-07 12:18:13,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 492 proven. 95 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:14,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:14,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-08-07 12:18:14,567 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:14,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:18:14,568 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:18:14,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:18:14,569 INFO L87 Difference]: Start difference. First operand 31298 states and 37549 transitions. Second operand 6 states. [2018-08-07 12:18:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:18:17,860 INFO L93 Difference]: Finished difference Result 70599 states and 85717 transitions. [2018-08-07 12:18:17,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:18:17,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 677 [2018-08-07 12:18:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:18:17,938 INFO L225 Difference]: With dead ends: 70599 [2018-08-07 12:18:17,938 INFO L226 Difference]: Without dead ends: 39687 [2018-08-07 12:18:17,981 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2721 GetRequests, 2707 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:18:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39687 states. [2018-08-07 12:18:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39687 to 37829. [2018-08-07 12:18:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37829 states. [2018-08-07 12:18:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37829 states to 37829 states and 45418 transitions. [2018-08-07 12:18:18,845 INFO L78 Accepts]: Start accepts. Automaton has 37829 states and 45418 transitions. Word has length 677 [2018-08-07 12:18:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:18:18,846 INFO L480 AbstractCegarLoop]: Abstraction has 37829 states and 45418 transitions. [2018-08-07 12:18:18,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:18:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37829 states and 45418 transitions. [2018-08-07 12:18:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2018-08-07 12:18:18,898 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:18:18,899 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 12:18:18,899 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:18:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2003083642, now seen corresponding path program 1 times [2018-08-07 12:18:18,899 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:18:18,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:18,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:18,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:18,900 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:18:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:19,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:19,801 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:18:19,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:19,818 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:20,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-08-07 12:18:20,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:21,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:21,283 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:18:21,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:21,304 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:21,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2018-08-07 12:18:22,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 594 proven. 144 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2018-08-07 12:18:22,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:22,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 7 [2018-08-07 12:18:22,546 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:22,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:18:22,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:18:22,548 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-08-07 12:18:22,549 INFO L87 Difference]: Start difference. First operand 37829 states and 45418 transitions. Second operand 6 states. [2018-08-07 12:18:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:18:26,138 INFO L93 Difference]: Finished difference Result 78426 states and 95301 transitions. [2018-08-07 12:18:26,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-08-07 12:18:26,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 744 [2018-08-07 12:18:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:18:26,224 INFO L225 Difference]: With dead ends: 78426 [2018-08-07 12:18:26,224 INFO L226 Difference]: Without dead ends: 40983 [2018-08-07 12:18:26,604 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2989 GetRequests, 2973 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:18:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40983 states. [2018-08-07 12:18:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40983 to 40674. [2018-08-07 12:18:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40674 states. [2018-08-07 12:18:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40674 states to 40674 states and 47859 transitions. [2018-08-07 12:18:27,245 INFO L78 Accepts]: Start accepts. Automaton has 40674 states and 47859 transitions. Word has length 744 [2018-08-07 12:18:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:18:27,246 INFO L480 AbstractCegarLoop]: Abstraction has 40674 states and 47859 transitions. [2018-08-07 12:18:27,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:18:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 40674 states and 47859 transitions. [2018-08-07 12:18:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2018-08-07 12:18:27,337 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:18:27,337 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:18:27,338 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:18:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1101492262, now seen corresponding path program 1 times [2018-08-07 12:18:27,338 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:18:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:27,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:27,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:27,339 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:18:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 205 proven. 748 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2018-08-07 12:18:29,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:29,009 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:18:29,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:29,026 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:29,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-08-07 12:18:29,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 396 proven. 186 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-08-07 12:18:31,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:31,029 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:18:31,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:31,045 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:31,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 1076 proven. 2 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-08-07 12:18:31,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:32,095 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:18:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 396 proven. 186 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-08-07 12:18:33,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:33,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 13 [2018-08-07 12:18:33,055 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:33,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-08-07 12:18:33,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-08-07 12:18:33,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:18:33,056 INFO L87 Difference]: Start difference. First operand 40674 states and 47859 transitions. Second operand 11 states. [2018-08-07 12:18:42,738 WARN L170 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-08-07 12:18:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:18:43,602 INFO L93 Difference]: Finished difference Result 85983 states and 101316 transitions. [2018-08-07 12:18:43,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-08-07 12:18:43,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 757 [2018-08-07 12:18:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:18:43,693 INFO L225 Difference]: With dead ends: 85983 [2018-08-07 12:18:43,693 INFO L226 Difference]: Without dead ends: 45695 [2018-08-07 12:18:43,747 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3103 GetRequests, 3053 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2018-08-07 12:18:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45695 states. [2018-08-07 12:18:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45695 to 42780. [2018-08-07 12:18:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42780 states. [2018-08-07 12:18:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42780 states to 42780 states and 50083 transitions. [2018-08-07 12:18:44,645 INFO L78 Accepts]: Start accepts. Automaton has 42780 states and 50083 transitions. Word has length 757 [2018-08-07 12:18:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:18:44,645 INFO L480 AbstractCegarLoop]: Abstraction has 42780 states and 50083 transitions. [2018-08-07 12:18:44,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-08-07 12:18:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42780 states and 50083 transitions. [2018-08-07 12:18:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-08-07 12:18:44,730 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:18:44,731 INFO L376 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, 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:18:44,731 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:18:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -385625113, now seen corresponding path program 1 times [2018-08-07 12:18:44,732 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:18:44,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:44,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:44,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:44,735 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:18:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1202 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2018-08-07 12:18:45,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:45,820 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:18:45,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:45,831 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:46,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-08-07 12:18:46,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1206 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2018-08-07 12:18:47,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:47,681 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:18:47,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:47,700 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:48,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1135 proven. 2 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2018-08-07 12:18:48,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:18:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 265 proven. 1206 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2018-08-07 12:18:49,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:18:49,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8] total 16 [2018-08-07 12:18:49,383 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:18:49,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:18:49,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:18:49,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:18:49,384 INFO L87 Difference]: Start difference. First operand 42780 states and 50083 transitions. Second operand 10 states. [2018-08-07 12:18:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:18:54,629 INFO L93 Difference]: Finished difference Result 103050 states and 123820 transitions. [2018-08-07 12:18:54,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:18:54,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 807 [2018-08-07 12:18:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:18:54,838 INFO L225 Difference]: With dead ends: 103050 [2018-08-07 12:18:54,838 INFO L226 Difference]: Without dead ends: 64232 [2018-08-07 12:18:54,938 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3251 GetRequests, 3228 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:18:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64232 states. [2018-08-07 12:18:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64232 to 62858. [2018-08-07 12:18:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62858 states. [2018-08-07 12:18:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62858 states to 62858 states and 74404 transitions. [2018-08-07 12:18:56,393 INFO L78 Accepts]: Start accepts. Automaton has 62858 states and 74404 transitions. Word has length 807 [2018-08-07 12:18:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:18:56,394 INFO L480 AbstractCegarLoop]: Abstraction has 62858 states and 74404 transitions. [2018-08-07 12:18:56,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 12:18:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 62858 states and 74404 transitions. [2018-08-07 12:18:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2018-08-07 12:18:56,513 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:18:56,513 INFO L376 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, 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, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 12:18:56,513 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:18:56,514 INFO L82 PathProgramCache]: Analyzing trace with hash 609720412, now seen corresponding path program 1 times [2018-08-07 12:18:56,514 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:18:56,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:56,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:56,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:18:56,515 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:18:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:58,183 WARN L170 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-08-07 12:18:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 495 proven. 815 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-08-07 12:18:58,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:18:58,816 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:18:58,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:18:58,826 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:18:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:18:59,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:18:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 1405 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-08-07 12:18:59,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 541 proven. 186 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2018-08-07 12:19:00,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:19:00,363 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:19:00,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:00,379 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:19:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:01,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:19:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 1405 proven. 2 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2018-08-07 12:19:01,436 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:01,626 WARN L170 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:19:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1994 backedges. 541 proven. 186 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2018-08-07 12:19:02,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:19:02,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 5, 5] total 23 [2018-08-07 12:19:02,813 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:19:02,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-08-07 12:19:02,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-08-07 12:19:02,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2018-08-07 12:19:02,815 INFO L87 Difference]: Start difference. First operand 62858 states and 74404 transitions. Second operand 16 states. [2018-08-07 12:19:11,588 WARN L170 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2018-08-07 12:19:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:19,779 INFO L93 Difference]: Finished difference Result 134813 states and 161822 transitions. [2018-08-07 12:19:19,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-08-07 12:19:19,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 824 [2018-08-07 12:19:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:19,934 INFO L225 Difference]: With dead ends: 134813 [2018-08-07 12:19:19,934 INFO L226 Difference]: Without dead ends: 70161 [2018-08-07 12:19:20,045 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3444 GetRequests, 3347 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1743, Invalid=7569, Unknown=0, NotChecked=0, Total=9312 [2018-08-07 12:19:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70161 states. [2018-08-07 12:19:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70161 to 67837. [2018-08-07 12:19:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67837 states. [2018-08-07 12:19:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67837 states to 67837 states and 77547 transitions. [2018-08-07 12:19:21,010 INFO L78 Accepts]: Start accepts. Automaton has 67837 states and 77547 transitions. Word has length 824 [2018-08-07 12:19:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:21,011 INFO L480 AbstractCegarLoop]: Abstraction has 67837 states and 77547 transitions. [2018-08-07 12:19:21,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-08-07 12:19:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 67837 states and 77547 transitions. [2018-08-07 12:19:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2018-08-07 12:19:21,488 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:21,488 INFO L376 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, 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:19:21,489 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:19:21,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1798867708, now seen corresponding path program 1 times [2018-08-07 12:19:21,489 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:21,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:21,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:21,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:21,490 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 668 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2018-08-07 12:19:23,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:19:23,209 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:19:23,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:23,224 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:19:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:23,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:19:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 2280 proven. 6 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2018-08-07 12:19:24,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 793 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-08-07 12:19:25,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:19:25,121 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:19:25,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:25,140 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:19:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:25,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:19:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 2280 proven. 6 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2018-08-07 12:19:26,567 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 943 proven. 793 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-08-07 12:19:27,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:19:27,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-08-07 12:19:27,638 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:19:27,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-08-07 12:19:27,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-08-07 12:19:27,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:19:27,645 INFO L87 Difference]: Start difference. First operand 67837 states and 77547 transitions. Second operand 9 states. [2018-08-07 12:19:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:33,254 INFO L93 Difference]: Finished difference Result 132162 states and 151006 transitions. [2018-08-07 12:19:33,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:19:33,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 980 [2018-08-07 12:19:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:33,468 INFO L225 Difference]: With dead ends: 132162 [2018-08-07 12:19:33,469 INFO L226 Difference]: Without dead ends: 77267 [2018-08-07 12:19:33,567 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3940 GetRequests, 3918 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:19:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77267 states. [2018-08-07 12:19:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77267 to 72492. [2018-08-07 12:19:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72492 states. [2018-08-07 12:19:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72492 states to 72492 states and 82759 transitions. [2018-08-07 12:19:34,702 INFO L78 Accepts]: Start accepts. Automaton has 72492 states and 82759 transitions. Word has length 980 [2018-08-07 12:19:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:34,703 INFO L480 AbstractCegarLoop]: Abstraction has 72492 states and 82759 transitions. [2018-08-07 12:19:34,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-08-07 12:19:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72492 states and 82759 transitions. [2018-08-07 12:19:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2018-08-07 12:19:34,838 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:34,839 INFO L376 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:19:34,839 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:19:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash -281424110, now seen corresponding path program 1 times [2018-08-07 12:19:34,839 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:34,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:34,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:34,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:34,840 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 352 proven. 10 refuted. 0 times theorem prover too weak. 2759 trivial. 0 not checked. [2018-08-07 12:19:36,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:19:36,001 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:19:36,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:36,014 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:19:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:19:36,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:19:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 1642 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2018-08-07 12:19:36,836 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:19:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 352 proven. 10 refuted. 0 times theorem prover too weak. 2759 trivial. 0 not checked. [2018-08-07 12:19:37,389 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:19:37,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-08-07 12:19:37,389 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:19:37,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:19:37,390 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:19:37,390 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:19:37,391 INFO L87 Difference]: Start difference. First operand 72492 states and 82759 transitions. Second operand 3 states. [2018-08-07 12:19:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:19:39,544 INFO L93 Difference]: Finished difference Result 135476 states and 154591 transitions. [2018-08-07 12:19:39,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:19:39,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 983 [2018-08-07 12:19:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:19:39,709 INFO L225 Difference]: With dead ends: 135476 [2018-08-07 12:19:39,710 INFO L226 Difference]: Without dead ends: 60308 [2018-08-07 12:19:39,839 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1968 GetRequests, 1967 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:19:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60308 states. [2018-08-07 12:19:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60308 to 56595. [2018-08-07 12:19:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56595 states. [2018-08-07 12:19:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56595 states to 56595 states and 63495 transitions. [2018-08-07 12:19:40,610 INFO L78 Accepts]: Start accepts. Automaton has 56595 states and 63495 transitions. Word has length 983 [2018-08-07 12:19:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:19:40,611 INFO L480 AbstractCegarLoop]: Abstraction has 56595 states and 63495 transitions. [2018-08-07 12:19:40,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:19:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 56595 states and 63495 transitions. [2018-08-07 12:19:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2018-08-07 12:19:40,684 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:19:40,684 INFO L376 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, 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-08-07 12:19:40,685 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:19:40,685 INFO L82 PathProgramCache]: Analyzing trace with hash -92788789, now seen corresponding path program 1 times [2018-08-07 12:19:40,685 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:19:40,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:40,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:19:40,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:19:40,686 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:19:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-08-07 12:19:41,358 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:120) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-08-07 12:19:41,363 INFO L168 Benchmark]: Toolchain (without parser) took 224462.51 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 675.7 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,366 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-08-07 12:19:41,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 974.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 76.6 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,368 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.03 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,369 INFO L168 Benchmark]: Boogie Preprocessor took 401.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -966.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,370 INFO L168 Benchmark]: RCFGBuilder took 5459.88 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 199.8 MB). Peak memory consumption was 199.8 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,370 INFO L168 Benchmark]: TraceAbstraction took 217456.09 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 503.2 MB. Max. memory is 7.1 GB. [2018-08-07 12:19:41,380 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 974.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 76.6 MB). Peak memory consumption was 76.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.03 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: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 401.55 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 841.5 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -966.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5459.88 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 199.8 MB). Peak memory consumption was 199.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217456.09 ms. Allocated memory was 2.4 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 503.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label54_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-19-41-401.csv Completed graceful shutdown