java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label12_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 12:03:05,780 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 12:03:05,782 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 12:03:05,799 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 12:03:05,799 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 12:03:05,800 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 12:03:05,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 12:03:05,803 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 12:03:05,805 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 12:03:05,806 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 12:03:05,806 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 12:03:05,807 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 12:03:05,808 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 12:03:05,808 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 12:03:05,810 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 12:03:05,810 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 12:03:05,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 12:03:05,813 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 12:03:05,815 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 12:03:05,816 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 12:03:05,817 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 12:03:05,818 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 12:03:05,821 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 12:03:05,821 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 12:03:05,821 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 12:03:05,822 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 12:03:05,823 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 12:03:05,824 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 12:03:05,825 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 12:03:05,826 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 12:03:05,826 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 12:03:05,827 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-07-24 12:03:05,829 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 12:03:05,847 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 12:03:05,848 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 12:03:05,848 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 12:03:05,849 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 12:03:05,849 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 12:03:05,849 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 12:03:05,849 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 12:03:05,849 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 12:03:05,850 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 12:03:05,850 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 12:03:05,850 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 12:03:05,851 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 12:03:05,851 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 12:03:05,851 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 12:03:05,851 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 12:03:05,851 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 12:03:05,852 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 12:03:05,852 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 12:03:05,852 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 12:03:05,852 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 12:03:05,852 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 12:03:05,852 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 12:03:05,853 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 12:03:05,853 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:03:05,853 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 12:03:05,853 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 12:03:05,853 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 12:03:05,854 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 12:03:05,854 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 12:03:05,854 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 12:03:05,854 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 12:03:05,854 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 12:03:05,855 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 12:03:05,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 12:03:05,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 12:03:05,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 12:03:05,930 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 12:03:05,931 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 12:03:05,931 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label12_false-unreach-call_false-termination.c [2018-07-24 12:03:06,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1bc271d/87a52ba0695c4d8583914efbd0ac4487/FLAG3833d6b08 [2018-07-24 12:03:06,616 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 12:03:06,617 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label12_false-unreach-call_false-termination.c [2018-07-24 12:03:06,642 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1bc271d/87a52ba0695c4d8583914efbd0ac4487/FLAG3833d6b08 [2018-07-24 12:03:06,666 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e1bc271d/87a52ba0695c4d8583914efbd0ac4487 [2018-07-24 12:03:06,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 12:03:06,684 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 12:03:06,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 12:03:06,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 12:03:06,698 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 12:03:06,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:03:06" (1/1) ... [2018-07-24 12:03:06,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcc3c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:06, skipping insertion in model container [2018-07-24 12:03:06,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 12:03:06" (1/1) ... [2018-07-24 12:03:06,932 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 12:03:07,241 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:03:07,259 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 12:03:07,448 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 12:03:07,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07 WrapperNode [2018-07-24 12:03:07,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 12:03:07,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 12:03:07,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 12:03:07,496 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 12:03:07,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 12:03:07,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 12:03:07,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 12:03:07,610 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 12:03:07,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... [2018-07-24 12:03:07,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 12:03:07,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 12:03:07,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 12:03:07,871 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 12:03:07,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 12:03:07,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 12:03:07,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 12:03:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 12:03:07,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 12:03:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 12:03:07,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 12:03:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:03:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_output [2018-07-24 12:03:11,658 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 12:03:11,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:03:11 BoogieIcfgContainer [2018-07-24 12:03:11,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 12:03:11,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 12:03:11,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 12:03:11,668 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 12:03:11,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 12:03:06" (1/3) ... [2018-07-24 12:03:11,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16add7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:03:11, skipping insertion in model container [2018-07-24 12:03:11,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 12:03:07" (2/3) ... [2018-07-24 12:03:11,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16add7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 12:03:11, skipping insertion in model container [2018-07-24 12:03:11,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 12:03:11" (3/3) ... [2018-07-24 12:03:11,673 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label12_false-unreach-call_false-termination.c [2018-07-24 12:03:11,682 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 12:03:11,690 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 12:03:11,744 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 12:03:11,745 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 12:03:11,745 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 12:03:11,745 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 12:03:11,745 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 12:03:11,746 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 12:03:11,746 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 12:03:11,746 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 12:03:11,746 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 12:03:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 12:03:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-07-24 12:03:11,776 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:11,778 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:11,778 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 867931945, now seen corresponding path program 1 times [2018-07-24 12:03:11,785 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:11,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:11,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:11,832 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:12,215 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:12,216 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 12:03:12,216 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:12,221 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 12:03:12,236 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 12:03:12,237 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:03:12,239 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 12:03:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:14,003 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 12:03:14,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 12:03:14,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-07-24 12:03:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:14,027 INFO L225 Difference]: With dead ends: 691 [2018-07-24 12:03:14,027 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 12:03:14,036 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 12:03:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 12:03:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 12:03:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 12:03:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-07-24 12:03:14,157 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 15 [2018-07-24 12:03:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:14,158 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-07-24 12:03:14,158 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 12:03:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-07-24 12:03:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-07-24 12:03:14,165 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:14,165 INFO L353 BasicCegarLoop]: trace histogram [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] [2018-07-24 12:03:14,166 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1338194916, now seen corresponding path program 1 times [2018-07-24 12:03:14,167 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:14,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:14,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:14,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:14,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:14,529 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:14,529 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 12:03:14,529 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:14,531 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 12:03:14,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 12:03:14,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 12:03:14,532 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-07-24 12:03:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:18,265 INFO L93 Difference]: Finished difference Result 1587 states and 2933 transitions. [2018-07-24 12:03:18,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 12:03:18,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2018-07-24 12:03:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:18,282 INFO L225 Difference]: With dead ends: 1587 [2018-07-24 12:03:18,282 INFO L226 Difference]: Without dead ends: 1159 [2018-07-24 12:03:18,288 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:03:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2018-07-24 12:03:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1152. [2018-07-24 12:03:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2018-07-24 12:03:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1885 transitions. [2018-07-24 12:03:18,406 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1885 transitions. Word has length 85 [2018-07-24 12:03:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:18,407 INFO L471 AbstractCegarLoop]: Abstraction has 1152 states and 1885 transitions. [2018-07-24 12:03:18,407 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 12:03:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1885 transitions. [2018-07-24 12:03:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-07-24 12:03:18,432 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:18,432 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:18,433 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:18,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2109034844, now seen corresponding path program 1 times [2018-07-24 12:03:18,434 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:18,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:18,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:18,436 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:18,886 WARN L169 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-07-24 12:03:19,453 WARN L169 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-07-24 12:03:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 12:03:19,761 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 12:03:19,761 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-07-24 12:03:19,762 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:19,762 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:03:19,763 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:03:19,763 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-07-24 12:03:19,763 INFO L87 Difference]: Start difference. First operand 1152 states and 1885 transitions. Second operand 7 states. [2018-07-24 12:03:23,030 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-07-24 12:03:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:27,489 INFO L93 Difference]: Finished difference Result 4147 states and 7164 transitions. [2018-07-24 12:03:27,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-07-24 12:03:27,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2018-07-24 12:03:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:27,522 INFO L225 Difference]: With dead ends: 4147 [2018-07-24 12:03:27,522 INFO L226 Difference]: Without dead ends: 3001 [2018-07-24 12:03:27,537 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:03:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2018-07-24 12:03:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2819. [2018-07-24 12:03:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2018-07-24 12:03:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4045 transitions. [2018-07-24 12:03:27,647 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4045 transitions. Word has length 181 [2018-07-24 12:03:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:27,647 INFO L471 AbstractCegarLoop]: Abstraction has 2819 states and 4045 transitions. [2018-07-24 12:03:27,648 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:03:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4045 transitions. [2018-07-24 12:03:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-07-24 12:03:27,658 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:27,659 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:27,659 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash 535669786, now seen corresponding path program 1 times [2018-07-24 12:03:27,659 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:27,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:27,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:27,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:27,661 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 101 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:03:28,020 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:28,020 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:03:28,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:28,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:28,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:03:28,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 101 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:03:29,631 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:29,631 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:03:29,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:29,663 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:29,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:03:30,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 101 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:03:30,354 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:03:30,355 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-07-24 12:03:30,355 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:03:30,361 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:03:30,361 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:03:30,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:03:30,362 INFO L87 Difference]: Start difference. First operand 2819 states and 4045 transitions. Second operand 9 states. [2018-07-24 12:03:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:34,996 INFO L93 Difference]: Finished difference Result 5966 states and 9144 transitions. [2018-07-24 12:03:34,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:03:34,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 321 [2018-07-24 12:03:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:35,016 INFO L225 Difference]: With dead ends: 5966 [2018-07-24 12:03:35,016 INFO L226 Difference]: Without dead ends: 2583 [2018-07-24 12:03:35,037 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1278 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:03:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2018-07-24 12:03:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2302. [2018-07-24 12:03:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2302 states. [2018-07-24 12:03:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 2963 transitions. [2018-07-24 12:03:35,170 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 2963 transitions. Word has length 321 [2018-07-24 12:03:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:35,171 INFO L471 AbstractCegarLoop]: Abstraction has 2302 states and 2963 transitions. [2018-07-24 12:03:35,171 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:03:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 2963 transitions. [2018-07-24 12:03:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-07-24 12:03:35,186 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:35,187 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:35,187 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -732459753, now seen corresponding path program 1 times [2018-07-24 12:03:35,187 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:35,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:35,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:35,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:35,189 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:35,680 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 12:03:36,119 WARN L169 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-07-24 12:03:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 101 proven. 112 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-07-24 12:03:36,925 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:36,925 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:03:36,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:36,933 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:37,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-07-24 12:03:37,316 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 24 proven. 138 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-07-24 12:03:38,013 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:03:38,014 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-07-24 12:03:38,014 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:38,014 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:03:38,015 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:03:38,015 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:03:38,015 INFO L87 Difference]: Start difference. First operand 2302 states and 2963 transitions. Second operand 5 states. [2018-07-24 12:03:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:39,529 INFO L93 Difference]: Finished difference Result 4650 states and 6088 transitions. [2018-07-24 12:03:39,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:03:39,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 354 [2018-07-24 12:03:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:39,541 INFO L225 Difference]: With dead ends: 4650 [2018-07-24 12:03:39,542 INFO L226 Difference]: Without dead ends: 2359 [2018-07-24 12:03:39,551 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 703 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-07-24 12:03:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2018-07-24 12:03:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2325. [2018-07-24 12:03:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2325 states. [2018-07-24 12:03:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2992 transitions. [2018-07-24 12:03:39,620 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2992 transitions. Word has length 354 [2018-07-24 12:03:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:39,621 INFO L471 AbstractCegarLoop]: Abstraction has 2325 states and 2992 transitions. [2018-07-24 12:03:39,621 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:03:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2992 transitions. [2018-07-24 12:03:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-07-24 12:03:39,636 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:39,636 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:03:39,637 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -735289566, now seen corresponding path program 1 times [2018-07-24 12:03:39,637 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:39,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:39,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:39,638 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:39,935 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 12:03:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 30 proven. 191 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-07-24 12:03:40,456 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:40,456 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:03:40,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:40,469 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:40,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-07-24 12:03:40,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 107 proven. 79 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-07-24 12:03:41,136 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:41,137 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:03:41,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:41,155 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:41,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 208 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-07-24 12:03:41,564 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 32 proven. 180 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-07-24 12:03:41,935 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 4 imperfect interpolant sequences. [2018-07-24 12:03:41,935 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 5, 5] total 13 [2018-07-24 12:03:41,935 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:41,936 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:03:41,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:03:41,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:03:41,937 INFO L87 Difference]: Start difference. First operand 2325 states and 2992 transitions. Second operand 5 states. [2018-07-24 12:03:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:43,353 INFO L93 Difference]: Finished difference Result 5227 states and 7072 transitions. [2018-07-24 12:03:43,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-07-24 12:03:43,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 357 [2018-07-24 12:03:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:43,367 INFO L225 Difference]: With dead ends: 5227 [2018-07-24 12:03:43,367 INFO L226 Difference]: Without dead ends: 2908 [2018-07-24 12:03:43,383 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1436 GetRequests, 1419 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-07-24 12:03:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2018-07-24 12:03:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2877. [2018-07-24 12:03:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2877 states. [2018-07-24 12:03:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 3613 transitions. [2018-07-24 12:03:43,459 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 3613 transitions. Word has length 357 [2018-07-24 12:03:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:43,459 INFO L471 AbstractCegarLoop]: Abstraction has 2877 states and 3613 transitions. [2018-07-24 12:03:43,459 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:03:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 3613 transitions. [2018-07-24 12:03:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-07-24 12:03:43,476 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:43,476 INFO L353 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:43,477 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1447176532, now seen corresponding path program 1 times [2018-07-24 12:03:43,477 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:43,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:43,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:43,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:43,478 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 229 proven. 250 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-07-24 12:03:44,591 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:44,591 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:03:44,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:44,599 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:44,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:45,517 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-07-24 12:03:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-07-24 12:03:45,609 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 32 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-07-24 12:03:46,111 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 12:03:46,112 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 18 [2018-07-24 12:03:46,112 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 12:03:46,112 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 12:03:46,113 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 12:03:46,113 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-07-24 12:03:46,113 INFO L87 Difference]: Start difference. First operand 2877 states and 3613 transitions. Second operand 5 states. [2018-07-24 12:03:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:49,149 INFO L93 Difference]: Finished difference Result 7915 states and 10467 transitions. [2018-07-24 12:03:49,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 12:03:49,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2018-07-24 12:03:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:49,178 INFO L225 Difference]: With dead ends: 7915 [2018-07-24 12:03:49,178 INFO L226 Difference]: Without dead ends: 5044 [2018-07-24 12:03:49,195 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 922 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-07-24 12:03:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2018-07-24 12:03:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 5005. [2018-07-24 12:03:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5005 states. [2018-07-24 12:03:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 6412 transitions. [2018-07-24 12:03:49,335 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 6412 transitions. Word has length 464 [2018-07-24 12:03:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:49,335 INFO L471 AbstractCegarLoop]: Abstraction has 5005 states and 6412 transitions. [2018-07-24 12:03:49,336 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 12:03:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 6412 transitions. [2018-07-24 12:03:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2018-07-24 12:03:49,373 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:49,374 INFO L353 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:49,374 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1873825986, now seen corresponding path program 1 times [2018-07-24 12:03:49,374 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:49,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:49,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:49,376 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 209 proven. 144 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-07-24 12:03:50,224 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:50,225 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:03:50,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:50,233 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:50,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 761 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2018-07-24 12:03:50,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 209 proven. 144 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-07-24 12:03:51,845 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:03:51,846 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:03:51,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:51,861 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:03:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:03:52,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:03:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 757 proven. 6 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2018-07-24 12:03:52,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:03:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 209 proven. 144 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-07-24 12:03:53,007 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:03:53,008 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 13 [2018-07-24 12:03:53,008 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:03:53,009 INFO L450 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-07-24 12:03:53,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-07-24 12:03:53,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-07-24 12:03:53,009 INFO L87 Difference]: Start difference. First operand 5005 states and 6412 transitions. Second operand 10 states. [2018-07-24 12:03:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:03:59,164 INFO L93 Difference]: Finished difference Result 14538 states and 19383 transitions. [2018-07-24 12:03:59,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-07-24 12:03:59,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 575 [2018-07-24 12:03:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:03:59,211 INFO L225 Difference]: With dead ends: 14538 [2018-07-24 12:03:59,211 INFO L226 Difference]: Without dead ends: 8611 [2018-07-24 12:03:59,248 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2376 GetRequests, 2322 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=1700, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 12:03:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2018-07-24 12:03:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 7881. [2018-07-24 12:03:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7881 states. [2018-07-24 12:03:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 9691 transitions. [2018-07-24 12:03:59,664 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 9691 transitions. Word has length 575 [2018-07-24 12:03:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:03:59,665 INFO L471 AbstractCegarLoop]: Abstraction has 7881 states and 9691 transitions. [2018-07-24 12:03:59,665 INFO L472 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-07-24 12:03:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 9691 transitions. [2018-07-24 12:03:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2018-07-24 12:03:59,714 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:03:59,714 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:03:59,715 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:03:59,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1267814041, now seen corresponding path program 1 times [2018-07-24 12:03:59,715 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:03:59,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:59,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:03:59,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:03:59,717 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:03:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:00,264 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 12:04:00,469 WARN L169 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 12:04:00,710 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:04:01,054 WARN L169 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 12:04:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 371 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-07-24 12:04:01,862 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:01,862 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:01,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:01,870 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:02,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 760 proven. 2 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2018-07-24 12:04:02,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 365 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-07-24 12:04:03,116 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:03,116 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:03,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:03,132 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:03,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 552 proven. 210 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2018-07-24 12:04:04,012 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 76 proven. 690 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 12:04:05,064 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:05,065 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 12:04:05,065 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:05,066 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 12:04:05,066 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 12:04:05,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 12:04:05,067 INFO L87 Difference]: Start difference. First operand 7881 states and 9691 transitions. Second operand 13 states. [2018-07-24 12:04:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:08,652 INFO L93 Difference]: Finished difference Result 16384 states and 21423 transitions. [2018-07-24 12:04:08,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 12:04:08,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 586 [2018-07-24 12:04:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:08,695 INFO L225 Difference]: With dead ends: 16384 [2018-07-24 12:04:08,695 INFO L226 Difference]: Without dead ends: 8286 [2018-07-24 12:04:08,721 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2333 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 12:04:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2018-07-24 12:04:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 7618. [2018-07-24 12:04:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2018-07-24 12:04:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 9134 transitions. [2018-07-24 12:04:08,944 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 9134 transitions. Word has length 586 [2018-07-24 12:04:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:08,945 INFO L471 AbstractCegarLoop]: Abstraction has 7618 states and 9134 transitions. [2018-07-24 12:04:08,945 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 12:04:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 9134 transitions. [2018-07-24 12:04:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-07-24 12:04:08,981 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:08,982 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 4, 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] [2018-07-24 12:04:08,982 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1020544034, now seen corresponding path program 2 times [2018-07-24 12:04:08,983 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:08,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:08,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:08,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:08,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 491 proven. 672 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2018-07-24 12:04:10,615 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:10,615 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:10,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 12:04:10,624 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 12:04:10,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 12:04:10,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 12:04:10,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 1068 proven. 2 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2018-07-24 12:04:11,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:11,345 WARN L169 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-07-24 12:04:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 304 proven. 144 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2018-07-24 12:04:12,297 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:12,297 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:04:12,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 12:04:12,312 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 12:04:12,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 12:04:12,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 12:04:12,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:13,779 WARN L169 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 12:04:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 965 proven. 8 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2018-07-24 12:04:14,397 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:14,639 WARN L169 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:04:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 52 proven. 925 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-07-24 12:04:15,876 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:15,876 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 8, 9] total 31 [2018-07-24 12:04:15,876 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:15,878 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 12:04:15,878 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 12:04:15,878 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2018-07-24 12:04:15,879 INFO L87 Difference]: Start difference. First operand 7618 states and 9134 transitions. Second operand 19 states. [2018-07-24 12:04:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:24,811 INFO L93 Difference]: Finished difference Result 17879 states and 24693 transitions. [2018-07-24 12:04:24,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 12:04:24,812 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 686 [2018-07-24 12:04:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:24,871 INFO L225 Difference]: With dead ends: 17879 [2018-07-24 12:04:24,871 INFO L226 Difference]: Without dead ends: 9345 [2018-07-24 12:04:24,920 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2745 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=972, Invalid=4284, Unknown=0, NotChecked=0, Total=5256 [2018-07-24 12:04:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2018-07-24 12:04:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 8791. [2018-07-24 12:04:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8791 states. [2018-07-24 12:04:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8791 states to 8791 states and 10301 transitions. [2018-07-24 12:04:25,203 INFO L78 Accepts]: Start accepts. Automaton has 8791 states and 10301 transitions. Word has length 686 [2018-07-24 12:04:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:25,204 INFO L471 AbstractCegarLoop]: Abstraction has 8791 states and 10301 transitions. [2018-07-24 12:04:25,205 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 12:04:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8791 states and 10301 transitions. [2018-07-24 12:04:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-07-24 12:04:25,228 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:25,228 INFO L353 BasicCegarLoop]: trace histogram [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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-07-24 12:04:25,229 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1454674078, now seen corresponding path program 1 times [2018-07-24 12:04:25,229 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:25,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:25,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 12:04:25,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:25,230 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 421 proven. 228 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-07-24 12:04:26,031 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:26,031 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:26,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:26,040 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:26,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 1184 proven. 2 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2018-07-24 12:04:26,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 421 proven. 228 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-07-24 12:04:27,320 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:27,321 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:04:27,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:27,336 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:27,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 1184 proven. 2 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2018-07-24 12:04:28,118 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 421 proven. 228 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-07-24 12:04:28,613 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:28,614 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 12:04:28,614 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:28,615 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:04:28,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:04:28,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:04:28,616 INFO L87 Difference]: Start difference. First operand 8791 states and 10301 transitions. Second operand 7 states. [2018-07-24 12:04:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:31,333 INFO L93 Difference]: Finished difference Result 24264 states and 35108 transitions. [2018-07-24 12:04:31,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:04:31,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 766 [2018-07-24 12:04:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:31,508 INFO L225 Difference]: With dead ends: 24264 [2018-07-24 12:04:31,508 INFO L226 Difference]: Without dead ends: 15416 [2018-07-24 12:04:31,601 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3080 GetRequests, 3065 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:04:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15416 states. [2018-07-24 12:04:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15416 to 14749. [2018-07-24 12:04:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14749 states. [2018-07-24 12:04:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14749 states to 14749 states and 17906 transitions. [2018-07-24 12:04:32,288 INFO L78 Accepts]: Start accepts. Automaton has 14749 states and 17906 transitions. Word has length 766 [2018-07-24 12:04:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:32,289 INFO L471 AbstractCegarLoop]: Abstraction has 14749 states and 17906 transitions. [2018-07-24 12:04:32,289 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:04:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14749 states and 17906 transitions. [2018-07-24 12:04:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2018-07-24 12:04:32,324 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:32,324 INFO L353 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:32,325 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2081190095, now seen corresponding path program 1 times [2018-07-24 12:04:32,325 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:32,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:32,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:32,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:32,327 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2348 backedges. 602 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 12:04:33,549 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:33,550 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:04:33,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:33,558 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:33,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2348 backedges. 1587 proven. 2 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2018-07-24 12:04:34,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2348 backedges. 602 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 12:04:34,926 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:34,927 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:04:34,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:34,942 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:35,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2348 backedges. 1587 proven. 2 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2018-07-24 12:04:35,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2348 backedges. 602 proven. 228 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2018-07-24 12:04:36,498 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:36,499 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 12:04:36,499 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:36,500 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 12:04:36,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 12:04:36,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 12:04:36,501 INFO L87 Difference]: Start difference. First operand 14749 states and 17906 transitions. Second operand 7 states. [2018-07-24 12:04:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:39,283 INFO L93 Difference]: Finished difference Result 29952 states and 36571 transitions. [2018-07-24 12:04:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 12:04:39,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 926 [2018-07-24 12:04:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:39,345 INFO L225 Difference]: With dead ends: 29952 [2018-07-24 12:04:39,346 INFO L226 Difference]: Without dead ends: 15392 [2018-07-24 12:04:39,424 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3719 GetRequests, 3704 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:04:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15392 states. [2018-07-24 12:04:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15392 to 15086. [2018-07-24 12:04:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15086 states. [2018-07-24 12:04:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15086 states to 15086 states and 17733 transitions. [2018-07-24 12:04:39,790 INFO L78 Accepts]: Start accepts. Automaton has 15086 states and 17733 transitions. Word has length 926 [2018-07-24 12:04:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:39,790 INFO L471 AbstractCegarLoop]: Abstraction has 15086 states and 17733 transitions. [2018-07-24 12:04:39,790 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 12:04:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15086 states and 17733 transitions. [2018-07-24 12:04:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2018-07-24 12:04:39,819 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:39,820 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:39,820 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash 473062512, now seen corresponding path program 1 times [2018-07-24 12:04:39,821 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:39,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:39,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:39,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:39,822 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:41,273 WARN L169 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:04:41,552 WARN L169 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-07-24 12:04:41,741 WARN L169 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-07-24 12:04:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 663 proven. 1376 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2018-07-24 12:04:43,408 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:43,408 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:04:43,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:43,417 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:43,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1798 proven. 2 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2018-07-24 12:04:44,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 679 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-07-24 12:04:45,443 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:45,444 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:04:45,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:45,459 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:46,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:04:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1793 proven. 25 refuted. 0 times theorem prover too weak. 1066 trivial. 0 not checked. [2018-07-24 12:04:46,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:04:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 679 proven. 228 refuted. 0 times theorem prover too weak. 1977 trivial. 0 not checked. [2018-07-24 12:04:47,428 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:04:47,429 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6, 5, 5] total 23 [2018-07-24 12:04:47,429 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:04:47,430 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 12:04:47,430 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 12:04:47,430 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-07-24 12:04:47,431 INFO L87 Difference]: Start difference. First operand 15086 states and 17733 transitions. Second operand 18 states. [2018-07-24 12:04:52,044 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 30 [2018-07-24 12:04:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:04:57,200 INFO L93 Difference]: Finished difference Result 30953 states and 38915 transitions. [2018-07-24 12:04:57,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-07-24 12:04:57,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 982 [2018-07-24 12:04:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:04:57,294 INFO L225 Difference]: With dead ends: 30953 [2018-07-24 12:04:57,294 INFO L226 Difference]: Without dead ends: 16056 [2018-07-24 12:04:57,373 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4017 GetRequests, 3953 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=982, Invalid=3308, Unknown=0, NotChecked=0, Total=4290 [2018-07-24 12:04:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16056 states. [2018-07-24 12:04:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16056 to 14903. [2018-07-24 12:04:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14903 states. [2018-07-24 12:04:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14903 states to 14903 states and 17191 transitions. [2018-07-24 12:04:57,851 INFO L78 Accepts]: Start accepts. Automaton has 14903 states and 17191 transitions. Word has length 982 [2018-07-24 12:04:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:04:57,852 INFO L471 AbstractCegarLoop]: Abstraction has 14903 states and 17191 transitions. [2018-07-24 12:04:57,852 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 12:04:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14903 states and 17191 transitions. [2018-07-24 12:04:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1104 [2018-07-24 12:04:57,878 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:04:57,879 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 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, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:04:57,879 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:04:57,880 INFO L82 PathProgramCache]: Analyzing trace with hash -903838946, now seen corresponding path program 1 times [2018-07-24 12:04:57,880 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:04:57,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:57,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:57,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:04:57,881 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:04:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 1276 proven. 230 refuted. 0 times theorem prover too weak. 2064 trivial. 0 not checked. [2018-07-24 12:04:59,066 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:04:59,066 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:04:59,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:04:59,074 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:04:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:04:59,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2114 proven. 6 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-07-24 12:05:00,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 1276 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2018-07-24 12:05:01,142 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:01,142 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:05:01,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:01,157 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:01,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2114 proven. 6 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-07-24 12:05:02,473 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 1276 proven. 303 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (21)] Exception during sending of exit command (exit): Broken pipe [2018-07-24 12:05:03,439 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:03,441 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-07-24 12:05:03,441 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:03,443 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 12:05:03,443 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 12:05:03,443 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 12:05:03,444 INFO L87 Difference]: Start difference. First operand 14903 states and 17191 transitions. Second operand 9 states. [2018-07-24 12:05:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:08,333 INFO L93 Difference]: Finished difference Result 34296 states and 40144 transitions. [2018-07-24 12:05:08,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 12:05:08,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1103 [2018-07-24 12:05:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:08,404 INFO L225 Difference]: With dead ends: 34296 [2018-07-24 12:05:08,405 INFO L226 Difference]: Without dead ends: 19582 [2018-07-24 12:05:08,449 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4428 GetRequests, 4408 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-07-24 12:05:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19582 states. [2018-07-24 12:05:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19582 to 19178. [2018-07-24 12:05:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19178 states. [2018-07-24 12:05:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19178 states to 19178 states and 22451 transitions. [2018-07-24 12:05:08,917 INFO L78 Accepts]: Start accepts. Automaton has 19178 states and 22451 transitions. Word has length 1103 [2018-07-24 12:05:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:08,918 INFO L471 AbstractCegarLoop]: Abstraction has 19178 states and 22451 transitions. [2018-07-24 12:05:08,918 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 12:05:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19178 states and 22451 transitions. [2018-07-24 12:05:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1256 [2018-07-24 12:05:08,951 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:08,952 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 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, 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, 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, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 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] [2018-07-24 12:05:08,952 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 341891011, now seen corresponding path program 1 times [2018-07-24 12:05:08,953 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:08,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:08,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:08,954 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 962 proven. 944 refuted. 0 times theorem prover too weak. 2835 trivial. 0 not checked. [2018-07-24 12:05:11,572 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:11,572 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:05:11,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:11,580 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:11,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 1956 proven. 2 refuted. 0 times theorem prover too weak. 2783 trivial. 0 not checked. [2018-07-24 12:05:12,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:12,902 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:05:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 971 proven. 112 refuted. 0 times theorem prover too weak. 3658 trivial. 0 not checked. [2018-07-24 12:05:14,408 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:14,408 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:05:14,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:14,423 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:15,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 3013 proven. 22 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked. [2018-07-24 12:05:17,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:17,457 WARN L169 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 12:05:17,726 WARN L169 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-07-24 12:05:18,905 WARN L169 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:05:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4741 backedges. 237 proven. 3126 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2018-07-24 12:05:23,182 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:23,183 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 10, 12] total 36 [2018-07-24 12:05:23,184 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:23,186 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:05:23,186 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:05:23,187 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2018-07-24 12:05:23,187 INFO L87 Difference]: Start difference. First operand 19178 states and 22451 transitions. Second operand 17 states. [2018-07-24 12:05:26,899 WARN L169 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-07-24 12:05:29,235 WARN L169 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2018-07-24 12:05:30,585 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-07-24 12:05:31,009 WARN L169 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-07-24 12:05:31,394 WARN L169 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-07-24 12:05:33,543 WARN L169 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-07-24 12:05:33,844 WARN L169 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:05:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:35,439 INFO L93 Difference]: Finished difference Result 38682 states and 45531 transitions. [2018-07-24 12:05:35,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-24 12:05:35,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1255 [2018-07-24 12:05:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:35,507 INFO L225 Difference]: With dead ends: 38682 [2018-07-24 12:05:35,507 INFO L226 Difference]: Without dead ends: 19693 [2018-07-24 12:05:35,564 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5106 GetRequests, 5027 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=952, Invalid=5210, Unknown=0, NotChecked=0, Total=6162 [2018-07-24 12:05:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19693 states. [2018-07-24 12:05:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19693 to 18819. [2018-07-24 12:05:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18819 states. [2018-07-24 12:05:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18819 states to 18819 states and 22066 transitions. [2018-07-24 12:05:36,053 INFO L78 Accepts]: Start accepts. Automaton has 18819 states and 22066 transitions. Word has length 1255 [2018-07-24 12:05:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:36,054 INFO L471 AbstractCegarLoop]: Abstraction has 18819 states and 22066 transitions. [2018-07-24 12:05:36,054 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:05:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 18819 states and 22066 transitions. [2018-07-24 12:05:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2018-07-24 12:05:36,086 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:36,087 INFO L353 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 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, 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, 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, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:36,087 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:36,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1475567866, now seen corresponding path program 1 times [2018-07-24 12:05:36,088 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:36,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:36,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:36,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:36,090 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:36,831 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 12:05:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 745 proven. 2885 refuted. 0 times theorem prover too weak. 1172 trivial. 0 not checked. [2018-07-24 12:05:40,994 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:40,994 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:05:41,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:41,003 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:41,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 1157 proven. 2 refuted. 0 times theorem prover too weak. 3643 trivial. 0 not checked. [2018-07-24 12:05:42,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 1157 proven. 2 refuted. 0 times theorem prover too weak. 3643 trivial. 0 not checked. [2018-07-24 12:05:43,526 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:05:43,526 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-07-24 12:05:43,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:43,542 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:05:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:05:44,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:05:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 1157 proven. 2 refuted. 0 times theorem prover too weak. 3643 trivial. 0 not checked. [2018-07-24 12:05:45,153 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:05:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 1157 proven. 2 refuted. 0 times theorem prover too weak. 3643 trivial. 0 not checked. [2018-07-24 12:05:46,056 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:05:46,058 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5, 5, 5] total 29 [2018-07-24 12:05:46,059 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:05:46,060 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-24 12:05:46,060 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-24 12:05:46,060 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2018-07-24 12:05:46,060 INFO L87 Difference]: Start difference. First operand 18819 states and 22066 transitions. Second operand 22 states. [2018-07-24 12:05:54,032 WARN L169 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2018-07-24 12:05:55,144 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2018-07-24 12:05:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:05:59,539 INFO L93 Difference]: Finished difference Result 34841 states and 40852 transitions. [2018-07-24 12:05:59,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-24 12:05:59,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1276 [2018-07-24 12:05:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:05:59,556 INFO L225 Difference]: With dead ends: 34841 [2018-07-24 12:05:59,556 INFO L226 Difference]: Without dead ends: 8703 [2018-07-24 12:05:59,602 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5233 GetRequests, 5139 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1265, Invalid=6925, Unknown=0, NotChecked=0, Total=8190 [2018-07-24 12:05:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8703 states. [2018-07-24 12:05:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8703 to 7691. [2018-07-24 12:05:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7691 states. [2018-07-24 12:05:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 8178 transitions. [2018-07-24 12:05:59,762 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 8178 transitions. Word has length 1276 [2018-07-24 12:05:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:05:59,763 INFO L471 AbstractCegarLoop]: Abstraction has 7691 states and 8178 transitions. [2018-07-24 12:05:59,763 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-24 12:05:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 8178 transitions. [2018-07-24 12:05:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1576 [2018-07-24 12:05:59,795 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:05:59,796 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 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, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:05:59,796 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:05:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1282420951, now seen corresponding path program 1 times [2018-07-24 12:05:59,797 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:05:59,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:59,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:05:59,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:05:59,799 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:05:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7290 backedges. 2461 proven. 2934 refuted. 0 times theorem prover too weak. 1895 trivial. 0 not checked. [2018-07-24 12:06:05,269 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:05,269 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-07-24 12:06:05,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:05,277 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:05,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7290 backedges. 3487 proven. 2 refuted. 0 times theorem prover too weak. 3801 trivial. 0 not checked. [2018-07-24 12:06:07,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7290 backedges. 1323 proven. 261 refuted. 0 times theorem prover too weak. 5706 trivial. 0 not checked. [2018-07-24 12:06:09,561 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:09,561 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 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 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:06:09,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:09,577 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:10,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7290 backedges. 4929 proven. 72 refuted. 0 times theorem prover too weak. 2289 trivial. 0 not checked. [2018-07-24 12:06:13,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7290 backedges. 303 proven. 4706 refuted. 0 times theorem prover too weak. 2281 trivial. 0 not checked. [2018-07-24 12:06:19,765 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:19,768 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6, 13, 14] total 35 [2018-07-24 12:06:19,768 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:19,769 INFO L450 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-07-24 12:06:19,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-07-24 12:06:19,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2018-07-24 12:06:19,770 INFO L87 Difference]: Start difference. First operand 7691 states and 8178 transitions. Second operand 22 states. [2018-07-24 12:06:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:25,911 INFO L93 Difference]: Finished difference Result 15449 states and 16763 transitions. [2018-07-24 12:06:25,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-07-24 12:06:25,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1575 [2018-07-24 12:06:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:25,926 INFO L225 Difference]: With dead ends: 15449 [2018-07-24 12:06:25,926 INFO L226 Difference]: Without dead ends: 8134 [2018-07-24 12:06:25,935 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6376 GetRequests, 6287 SyntacticMatches, 26 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=853, Invalid=3307, Unknown=0, NotChecked=0, Total=4160 [2018-07-24 12:06:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8134 states. [2018-07-24 12:06:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8134 to 7613. [2018-07-24 12:06:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7613 states. [2018-07-24 12:06:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7613 states to 7613 states and 7972 transitions. [2018-07-24 12:06:26,090 INFO L78 Accepts]: Start accepts. Automaton has 7613 states and 7972 transitions. Word has length 1575 [2018-07-24 12:06:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:26,092 INFO L471 AbstractCegarLoop]: Abstraction has 7613 states and 7972 transitions. [2018-07-24 12:06:26,092 INFO L472 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-07-24 12:06:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7613 states and 7972 transitions. [2018-07-24 12:06:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1580 [2018-07-24 12:06:26,125 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:26,126 INFO L353 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 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, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:26,127 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash -388983793, now seen corresponding path program 1 times [2018-07-24 12:06:26,127 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:26,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:26,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:26,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:26,129 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:27,376 WARN L169 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-07-24 12:06:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 1220 proven. 1168 refuted. 0 times theorem prover too weak. 4903 trivial. 0 not checked. [2018-07-24 12:06:29,627 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:29,627 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 12:06:29,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:29,635 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:30,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 2497 proven. 2 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2018-07-24 12:06:31,319 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:31,514 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-07-24 12:06:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 1229 proven. 112 refuted. 0 times theorem prover too weak. 5950 trivial. 0 not checked. [2018-07-24 12:06:33,423 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 12:06:33,423 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 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 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 12:06:33,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:33,441 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 12:06:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:34,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 12:06:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 2479 proven. 20 refuted. 0 times theorem prover too weak. 4792 trivial. 0 not checked. [2018-07-24 12:06:36,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 12:06:36,624 WARN L169 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 12:06:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 223 proven. 2280 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-07-24 12:06:40,897 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 12:06:40,899 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 30 [2018-07-24 12:06:40,899 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 12:06:40,900 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 12:06:40,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 12:06:40,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2018-07-24 12:06:40,901 INFO L87 Difference]: Start difference. First operand 7613 states and 7972 transitions. Second operand 17 states. [2018-07-24 12:06:49,375 WARN L169 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:06:52,247 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2018-07-24 12:06:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 12:06:52,354 INFO L93 Difference]: Finished difference Result 15323 states and 16061 transitions. [2018-07-24 12:06:52,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-07-24 12:06:52,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1579 [2018-07-24 12:06:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 12:06:52,368 INFO L225 Difference]: With dead ends: 15323 [2018-07-24 12:06:52,368 INFO L226 Difference]: Without dead ends: 7365 [2018-07-24 12:06:52,378 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 6399 GetRequests, 6324 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=835, Invalid=4277, Unknown=0, NotChecked=0, Total=5112 [2018-07-24 12:06:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7365 states. [2018-07-24 12:06:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7365 to 6848. [2018-07-24 12:06:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6848 states. [2018-07-24 12:06:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 7113 transitions. [2018-07-24 12:06:52,517 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 7113 transitions. Word has length 1579 [2018-07-24 12:06:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 12:06:52,518 INFO L471 AbstractCegarLoop]: Abstraction has 6848 states and 7113 transitions. [2018-07-24 12:06:52,518 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 12:06:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 7113 transitions. [2018-07-24 12:06:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1759 [2018-07-24 12:06:52,554 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 12:06:52,555 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 8, 8, 8, 8, 8, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 12:06:52,555 INFO L414 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___false_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 12:06:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -585680113, now seen corresponding path program 1 times [2018-07-24 12:06:52,556 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 12:06:52,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:52,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 12:06:52,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 12:06:52,557 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 12:06:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 12:06:54,033 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 Received shutdown request... [2018-07-24 12:06:54,488 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 12:06:54,493 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 12:06:54,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 12:06:54 BoogieIcfgContainer [2018-07-24 12:06:54,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 12:06:54,494 INFO L168 Benchmark]: Toolchain (without parser) took 227811.56 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -322.4 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,495 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 12:06:54,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 806.99 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,496 INFO L168 Benchmark]: Boogie Procedure Inliner took 113.84 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,496 INFO L168 Benchmark]: Boogie Preprocessor took 260.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.9 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,497 INFO L168 Benchmark]: RCFGBuilder took 3788.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 139.8 MB). Peak memory consumption was 139.8 MB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,498 INFO L168 Benchmark]: TraceAbstraction took 222832.51 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 349.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-07-24 12:06:54,501 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 806.99 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: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 113.84 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: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 260.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 774.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -874.9 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3788.80 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 139.8 MB). Peak memory consumption was 139.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222832.51 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 349.2 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 28]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 28). Cancelled while BasicCegarLoop was analyzing trace of length 1759 with TraceHistMax 14, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 222.7s OverallTime, 19 OverallIterations, 14 TraceHistogramMax, 107.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1576 SDtfs, 45057 SDslu, 4568 SDs, 0 SdLazy, 62197 SolverSat, 7461 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 69.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50367 GetRequests, 49635 SyntacticMatches, 100 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9919 ImplicationChecksByTransitivity, 39.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19178occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 7980 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 12.2s SatisfiabilityAnalysisTime, 77.8s InterpolantComputationTime, 37878 NumberOfCodeBlocks, 37878 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 62596 ConstructedInterpolants, 17 QuantifiedInterpolants, 271459322 SizeOfPredicates, 79 NumberOfNonLiveVariables, 35304 ConjunctsInSsa, 467 ConjunctsInUnsatCore, 74 InterpolantComputations, 6 PerfectInterpolantSequences, 167999/195897 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label12_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_12-06-54-513.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label12_false-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_12-06-54-513.csv Completed graceful shutdown