java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label45_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-3142e50-m [2018-09-10 12:20:46,671 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-10 12:20:46,673 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-10 12:20:46,685 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-10 12:20:46,685 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-10 12:20:46,687 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-10 12:20:46,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-10 12:20:46,694 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-10 12:20:46,696 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-10 12:20:46,698 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-10 12:20:46,699 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-10 12:20:46,701 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-10 12:20:46,702 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-10 12:20:46,704 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-10 12:20:46,705 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-10 12:20:46,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-10 12:20:46,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-10 12:20:46,717 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-10 12:20:46,722 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-10 12:20:46,723 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-10 12:20:46,725 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-10 12:20:46,726 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-10 12:20:46,728 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-10 12:20:46,734 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-10 12:20:46,734 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-10 12:20:46,735 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-10 12:20:46,736 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-10 12:20:46,736 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-10 12:20:46,755 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-10 12:20:46,755 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-10 12:20:46,756 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-10 12:20:46,757 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-10 12:20:46,757 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-10 12:20:46,757 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-10 12:20:46,757 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-10 12:20:46,757 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-10 12:20:46,757 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-10 12:20:46,758 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-10 12:20:46,758 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-10 12:20:46,758 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-10 12:20:46,759 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-10 12:20:46,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-10 12:20:46,759 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-10 12:20:46,759 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-10 12:20:46,759 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-10 12:20:46,760 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-10 12:20:46,760 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-10 12:20:46,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-10 12:20:46,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-10 12:20:46,760 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-10 12:20:46,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-10 12:20:46,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:20:46,761 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-10 12:20:46,761 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-10 12:20:46,761 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-10 12:20:46,762 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-10 12:20:46,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-10 12:20:46,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-10 12:20:46,762 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-10 12:20:46,762 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-10 12:20:46,763 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-10 12:20:46,808 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-10 12:20:46,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-10 12:20:46,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-10 12:20:46,830 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-10 12:20:46,830 INFO L276 PluginConnector]: CDTParser initialized [2018-09-10 12:20:46,831 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label45_true-unreach-call.c [2018-09-10 12:20:47,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0c8b9fd/63bb1bdca6294d8ca52e769702c1b02c/FLAG470184525 [2018-09-10 12:20:47,619 INFO L276 CDTParser]: Found 1 translation units. [2018-09-10 12:20:47,620 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label45_true-unreach-call.c [2018-09-10 12:20:47,646 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0c8b9fd/63bb1bdca6294d8ca52e769702c1b02c/FLAG470184525 [2018-09-10 12:20:47,667 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc0c8b9fd/63bb1bdca6294d8ca52e769702c1b02c [2018-09-10 12:20:47,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-10 12:20:47,681 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-10 12:20:47,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-10 12:20:47,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-10 12:20:47,689 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-10 12:20:47,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:20:47" (1/1) ... [2018-09-10 12:20:47,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2299a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:47, skipping insertion in model container [2018-09-10 12:20:47,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 12:20:47" (1/1) ... [2018-09-10 12:20:47,947 INFO L180 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-09-10 12:20:48,516 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:20:48,539 INFO L431 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-10 12:20:48,828 INFO L175 PostProcessor]: Settings: Checked method=main [2018-09-10 12:20:48,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48 WrapperNode [2018-09-10 12:20:48,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-10 12:20:48,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-10 12:20:48,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-10 12:20:48,939 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-10 12:20:48,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-10 12:20:49,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-10 12:20:49,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-10 12:20:49,138 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-10 12:20:49,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... [2018-09-10 12:20:49,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-10 12:20:49,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-10 12:20:49,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-10 12:20:49,589 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-10 12:20:49,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-10 12:20:49,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-10 12:20:49,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-10 12:20:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:20:49,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output [2018-09-10 12:20:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-10 12:20:49,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-10 12:20:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-10 12:20:49,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-10 12:20:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:20:49,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_output2 [2018-09-10 12:20:56,184 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-10 12:20:56,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:20:56 BoogieIcfgContainer [2018-09-10 12:20:56,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-10 12:20:56,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-10 12:20:56,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-10 12:20:56,190 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-10 12:20:56,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 12:20:47" (1/3) ... [2018-09-10 12:20:56,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4ec920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:20:56, skipping insertion in model container [2018-09-10 12:20:56,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 12:20:48" (2/3) ... [2018-09-10 12:20:56,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4ec920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 12:20:56, skipping insertion in model container [2018-09-10 12:20:56,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 12:20:56" (3/3) ... [2018-09-10 12:20:56,195 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label45_true-unreach-call.c [2018-09-10 12:20:56,205 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-10 12:20:56,214 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-10 12:20:56,269 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-10 12:20:56,270 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-10 12:20:56,270 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-10 12:20:56,270 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-10 12:20:56,271 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-10 12:20:56,271 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-10 12:20:56,271 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-10 12:20:56,271 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-10 12:20:56,271 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-10 12:20:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-10 12:20:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-10 12:20:56,316 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:20:56,317 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:20:56,318 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:20:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1560117220, now seen corresponding path program 1 times [2018-09-10 12:20:56,328 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:20:56,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:56,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:20:56,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:20:56,380 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:20:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:20:56,803 WARN L175 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:20:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:20:56,882 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:20:56,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-10 12:20:56,883 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:20:56,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:20:56,906 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:20:56,906 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:20:56,909 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-10 12:21:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:01,038 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-10 12:21:01,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:21:01,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2018-09-10 12:21:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:01,074 INFO L225 Difference]: With dead ends: 1156 [2018-09-10 12:21:01,074 INFO L226 Difference]: Without dead ends: 744 [2018-09-10 12:21:01,084 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-10 12:21:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-10 12:21:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-10 12:21:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-10 12:21:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1343 transitions. [2018-09-10 12:21:01,194 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1343 transitions. Word has length 60 [2018-09-10 12:21:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:01,195 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1343 transitions. [2018-09-10 12:21:01,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:21:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1343 transitions. [2018-09-10 12:21:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-10 12:21:01,204 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:01,204 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:01,205 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1772371123, now seen corresponding path program 1 times [2018-09-10 12:21:01,205 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:01,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:01,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:01,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:01,207 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:21:01,660 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:21:01,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:21:01,661 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:01,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:21:01,663 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:21:01,664 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:21:01,664 INFO L87 Difference]: Start difference. First operand 744 states and 1343 transitions. Second operand 6 states. [2018-09-10 12:21:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:08,316 INFO L93 Difference]: Finished difference Result 2192 states and 4029 transitions. [2018-09-10 12:21:08,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:21:08,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2018-09-10 12:21:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:08,329 INFO L225 Difference]: With dead ends: 2192 [2018-09-10 12:21:08,330 INFO L226 Difference]: Without dead ends: 1454 [2018-09-10 12:21:08,334 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:21:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2018-09-10 12:21:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1444. [2018-09-10 12:21:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2018-09-10 12:21:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2400 transitions. [2018-09-10 12:21:08,408 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2400 transitions. Word has length 133 [2018-09-10 12:21:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:08,409 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 2400 transitions. [2018-09-10 12:21:08,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:21:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2400 transitions. [2018-09-10 12:21:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-09-10 12:21:08,417 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:08,418 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:08,418 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash -87420099, now seen corresponding path program 1 times [2018-09-10 12:21:08,419 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:08,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:08,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:08,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:08,420 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-10 12:21:08,783 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-10 12:21:08,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-10 12:21:08,783 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:08,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:21:08,784 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:21:08,784 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-10 12:21:08,787 INFO L87 Difference]: Start difference. First operand 1444 states and 2400 transitions. Second operand 6 states. [2018-09-10 12:21:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:17,555 INFO L93 Difference]: Finished difference Result 3942 states and 6538 transitions. [2018-09-10 12:21:17,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-10 12:21:17,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 205 [2018-09-10 12:21:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:17,583 INFO L225 Difference]: With dead ends: 3942 [2018-09-10 12:21:17,584 INFO L226 Difference]: Without dead ends: 2504 [2018-09-10 12:21:17,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:21:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2018-09-10 12:21:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2485. [2018-09-10 12:21:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2485 states. [2018-09-10 12:21:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 3808 transitions. [2018-09-10 12:21:17,680 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 3808 transitions. Word has length 205 [2018-09-10 12:21:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:17,681 INFO L480 AbstractCegarLoop]: Abstraction has 2485 states and 3808 transitions. [2018-09-10 12:21:17,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:21:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 3808 transitions. [2018-09-10 12:21:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-09-10 12:21:17,689 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:17,690 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:21:17,690 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1153390021, now seen corresponding path program 1 times [2018-09-10 12:21:17,691 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:17,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:17,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:17,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:17,693 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:21:17,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:17,993 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:18,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:18,003 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:18,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-10 12:21:18,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:21:18,990 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:21:18,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:21:18,991 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:18,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:21:18,992 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:21:18,992 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:21:18,993 INFO L87 Difference]: Start difference. First operand 2485 states and 3808 transitions. Second operand 5 states. [2018-09-10 12:21:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:28,171 INFO L93 Difference]: Finished difference Result 6615 states and 10169 transitions. [2018-09-10 12:21:28,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-10 12:21:28,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2018-09-10 12:21:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:28,211 INFO L225 Difference]: With dead ends: 6615 [2018-09-10 12:21:28,211 INFO L226 Difference]: Without dead ends: 4136 [2018-09-10 12:21:28,225 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:21:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2018-09-10 12:21:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 4119. [2018-09-10 12:21:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4119 states. [2018-09-10 12:21:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 5851 transitions. [2018-09-10 12:21:28,371 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 5851 transitions. Word has length 249 [2018-09-10 12:21:28,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:28,371 INFO L480 AbstractCegarLoop]: Abstraction has 4119 states and 5851 transitions. [2018-09-10 12:21:28,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:21:28,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 5851 transitions. [2018-09-10 12:21:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-10 12:21:28,382 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:28,383 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:28,383 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash 190429622, now seen corresponding path program 1 times [2018-09-10 12:21:28,384 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:28,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:28,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:28,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:28,385 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:21:28,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:28,890 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:28,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:28,904 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:29,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:21:29,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-10 12:21:29,654 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:21:29,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2018-09-10 12:21:29,654 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:29,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-10 12:21:29,656 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-10 12:21:29,656 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:21:29,656 INFO L87 Difference]: Start difference. First operand 4119 states and 5851 transitions. Second operand 4 states. [2018-09-10 12:21:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:33,805 INFO L93 Difference]: Finished difference Result 11872 states and 17468 transitions. [2018-09-10 12:21:33,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-10 12:21:33,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 300 [2018-09-10 12:21:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:33,853 INFO L225 Difference]: With dead ends: 11872 [2018-09-10 12:21:33,854 INFO L226 Difference]: Without dead ends: 7759 [2018-09-10 12:21:33,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 599 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-10 12:21:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2018-09-10 12:21:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 7759. [2018-09-10 12:21:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7759 states. [2018-09-10 12:21:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7759 states to 7759 states and 10882 transitions. [2018-09-10 12:21:34,089 INFO L78 Accepts]: Start accepts. Automaton has 7759 states and 10882 transitions. Word has length 300 [2018-09-10 12:21:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:34,090 INFO L480 AbstractCegarLoop]: Abstraction has 7759 states and 10882 transitions. [2018-09-10 12:21:34,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-10 12:21:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7759 states and 10882 transitions. [2018-09-10 12:21:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-09-10 12:21:34,108 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:34,108 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:21:34,109 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash -277320712, now seen corresponding path program 1 times [2018-09-10 12:21:34,109 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:34,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:34,111 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:34,429 WARN L175 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:21:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 106 proven. 131 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:21:34,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:34,846 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:21:34,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:34,855 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:34,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-09-10 12:21:35,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 106 proven. 131 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-10 12:21:35,497 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:21:35,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-10 12:21:35,497 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:21:35,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-10 12:21:35,498 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-10 12:21:35,499 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:21:35,499 INFO L87 Difference]: Start difference. First operand 7759 states and 10882 transitions. Second operand 5 states. [2018-09-10 12:21:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:41,132 INFO L93 Difference]: Finished difference Result 17967 states and 25645 transitions. [2018-09-10 12:21:41,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-10 12:21:41,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 360 [2018-09-10 12:21:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:41,205 INFO L225 Difference]: With dead ends: 17967 [2018-09-10 12:21:41,205 INFO L226 Difference]: Without dead ends: 10214 [2018-09-10 12:21:41,240 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 714 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:21:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10214 states. [2018-09-10 12:21:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10214 to 9821. [2018-09-10 12:21:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9821 states. [2018-09-10 12:21:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9821 states to 9821 states and 13014 transitions. [2018-09-10 12:21:41,492 INFO L78 Accepts]: Start accepts. Automaton has 9821 states and 13014 transitions. Word has length 360 [2018-09-10 12:21:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:41,493 INFO L480 AbstractCegarLoop]: Abstraction has 9821 states and 13014 transitions. [2018-09-10 12:21:41,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-10 12:21:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9821 states and 13014 transitions. [2018-09-10 12:21:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2018-09-10 12:21:41,542 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:41,543 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:41,543 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 355706370, now seen corresponding path program 1 times [2018-09-10 12:21:41,544 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:41,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:41,545 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 389 proven. 29 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-10 12:21:42,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:42,346 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:42,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:42,356 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:42,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:21:42,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-10 12:21:43,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:43,456 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:43,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:43,471 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:43,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 389 proven. 6 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-10 12:21:44,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 391 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-10 12:21:45,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:45,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:21:45,093 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:45,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:21:45,094 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:21:45,094 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:21:45,095 INFO L87 Difference]: Start difference. First operand 9821 states and 13014 transitions. Second operand 9 states. [2018-09-10 12:21:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:21:53,343 INFO L93 Difference]: Finished difference Result 24418 states and 33106 transitions. [2018-09-10 12:21:53,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-10 12:21:53,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 544 [2018-09-10 12:21:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:21:53,439 INFO L225 Difference]: With dead ends: 24418 [2018-09-10 12:21:53,440 INFO L226 Difference]: Without dead ends: 14603 [2018-09-10 12:21:53,523 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2197 GetRequests, 2173 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-09-10 12:21:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2018-09-10 12:21:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14099. [2018-09-10 12:21:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14099 states. [2018-09-10 12:21:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14099 states to 14099 states and 17520 transitions. [2018-09-10 12:21:53,856 INFO L78 Accepts]: Start accepts. Automaton has 14099 states and 17520 transitions. Word has length 544 [2018-09-10 12:21:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:21:53,858 INFO L480 AbstractCegarLoop]: Abstraction has 14099 states and 17520 transitions. [2018-09-10 12:21:53,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:21:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14099 states and 17520 transitions. [2018-09-10 12:21:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2018-09-10 12:21:53,897 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:21:53,898 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:21:53,898 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:21:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1686182037, now seen corresponding path program 1 times [2018-09-10 12:21:53,898 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:21:53,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:53,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:53,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:21:53,900 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:21:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-09-10 12:21:54,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:54,616 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:21:54,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:54,624 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:54,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 508 proven. 2 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-10 12:21:55,093 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2018-09-10 12:21:55,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:21:55,372 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:21:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:21:55,387 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:21:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:21:55,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:21:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 508 proven. 2 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-10 12:21:56,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:21:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 336 proven. 141 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (8)] Exception during sending of exit command (exit): Broken pipe [2018-09-10 12:21:56,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:21:56,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-10 12:21:56,383 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:21:56,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:21:56,384 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:21:56,385 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-10 12:21:56,385 INFO L87 Difference]: Start difference. First operand 14099 states and 17520 transitions. Second operand 9 states. [2018-09-10 12:22:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:02,570 INFO L93 Difference]: Finished difference Result 31466 states and 41313 transitions. [2018-09-10 12:22:02,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:22:02,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 571 [2018-09-10 12:22:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:02,668 INFO L225 Difference]: With dead ends: 31466 [2018-09-10 12:22:02,668 INFO L226 Difference]: Without dead ends: 17400 [2018-09-10 12:22:02,754 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2304 GetRequests, 2282 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:22:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2018-09-10 12:22:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 17365. [2018-09-10 12:22:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17365 states. [2018-09-10 12:22:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17365 states to 17365 states and 21800 transitions. [2018-09-10 12:22:03,200 INFO L78 Accepts]: Start accepts. Automaton has 17365 states and 21800 transitions. Word has length 571 [2018-09-10 12:22:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:03,201 INFO L480 AbstractCegarLoop]: Abstraction has 17365 states and 21800 transitions. [2018-09-10 12:22:03,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:22:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17365 states and 21800 transitions. [2018-09-10 12:22:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-09-10 12:22:03,246 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:03,247 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:22:03,247 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:03,247 INFO L82 PathProgramCache]: Analyzing trace with hash 202727997, now seen corresponding path program 1 times [2018-09-10 12:22:03,248 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:03,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:03,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:03,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:03,249 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:03,885 WARN L175 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-10 12:22:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 157 proven. 324 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-10 12:22:04,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:04,986 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:04,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:04,993 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:05,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-09-10 12:22:05,405 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2018-09-10 12:22:05,748 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-10 12:22:05,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-10 12:22:05,749 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:22:05,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-10 12:22:05,750 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-10 12:22:05,751 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:22:05,751 INFO L87 Difference]: Start difference. First operand 17365 states and 21800 transitions. Second operand 3 states. [2018-09-10 12:22:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:08,687 INFO L93 Difference]: Finished difference Result 34697 states and 43551 transitions. [2018-09-10 12:22:08,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-10 12:22:08,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 643 [2018-09-10 12:22:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:08,753 INFO L225 Difference]: With dead ends: 34697 [2018-09-10 12:22:08,753 INFO L226 Difference]: Without dead ends: 17365 [2018-09-10 12:22:08,822 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 1286 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-10 12:22:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17365 states. [2018-09-10 12:22:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17365 to 17287. [2018-09-10 12:22:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17287 states. [2018-09-10 12:22:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17287 states to 17287 states and 20788 transitions. [2018-09-10 12:22:09,199 INFO L78 Accepts]: Start accepts. Automaton has 17287 states and 20788 transitions. Word has length 643 [2018-09-10 12:22:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:09,200 INFO L480 AbstractCegarLoop]: Abstraction has 17287 states and 20788 transitions. [2018-09-10 12:22:09,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-10 12:22:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 17287 states and 20788 transitions. [2018-09-10 12:22:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2018-09-10 12:22:09,247 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:09,247 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:22:09,248 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:09,248 INFO L82 PathProgramCache]: Analyzing trace with hash 685583610, now seen corresponding path program 1 times [2018-09-10 12:22:09,248 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:09,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:09,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:09,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:09,250 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 12:22:10,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:10,193 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:10,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:10,209 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:10,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 12:22:10,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 12:22:11,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:11,130 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:11,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:11,147 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:11,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 12:22:11,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 306 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2018-09-10 12:22:12,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:12,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 14 [2018-09-10 12:22:12,038 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:12,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:22:12,040 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:22:12,040 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-09-10 12:22:12,040 INFO L87 Difference]: Start difference. First operand 17287 states and 20788 transitions. Second operand 9 states. [2018-09-10 12:22:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:21,527 INFO L93 Difference]: Finished difference Result 59222 states and 77147 transitions. [2018-09-10 12:22:21,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-10 12:22:21,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 660 [2018-09-10 12:22:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:21,774 INFO L225 Difference]: With dead ends: 59222 [2018-09-10 12:22:21,774 INFO L226 Difference]: Without dead ends: 30969 [2018-09-10 12:22:22,044 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2658 GetRequests, 2636 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:22:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30969 states. [2018-09-10 12:22:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30969 to 29658. [2018-09-10 12:22:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29658 states. [2018-09-10 12:22:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29658 states to 29658 states and 34480 transitions. [2018-09-10 12:22:22,885 INFO L78 Accepts]: Start accepts. Automaton has 29658 states and 34480 transitions. Word has length 660 [2018-09-10 12:22:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:22,886 INFO L480 AbstractCegarLoop]: Abstraction has 29658 states and 34480 transitions. [2018-09-10 12:22:22,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:22:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 29658 states and 34480 transitions. [2018-09-10 12:22:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 952 [2018-09-10 12:22:22,916 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:22,917 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:22:22,917 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1674836197, now seen corresponding path program 1 times [2018-09-10 12:22:22,918 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:22,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:22,919 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:22:24,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:24,584 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:24,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:24,594 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:24,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:22:25,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:22:26,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:26,223 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:22:26,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:26,240 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:26,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:22:27,709 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 729 proven. 2 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-09-10 12:22:28,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:28,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-10 12:22:28,406 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:28,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:22:28,408 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:22:28,408 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-10 12:22:28,411 INFO L87 Difference]: Start difference. First operand 29658 states and 34480 transitions. Second operand 9 states. [2018-09-10 12:22:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:34,747 INFO L93 Difference]: Finished difference Result 61303 states and 70442 transitions. [2018-09-10 12:22:34,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-10 12:22:34,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 951 [2018-09-10 12:22:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:34,814 INFO L225 Difference]: With dead ends: 61303 [2018-09-10 12:22:34,814 INFO L226 Difference]: Without dead ends: 23989 [2018-09-10 12:22:34,964 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3824 GetRequests, 3801 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2018-09-10 12:22:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23989 states. [2018-09-10 12:22:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23989 to 23471. [2018-09-10 12:22:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23471 states. [2018-09-10 12:22:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23471 states to 23471 states and 25345 transitions. [2018-09-10 12:22:35,375 INFO L78 Accepts]: Start accepts. Automaton has 23471 states and 25345 transitions. Word has length 951 [2018-09-10 12:22:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:35,376 INFO L480 AbstractCegarLoop]: Abstraction has 23471 states and 25345 transitions. [2018-09-10 12:22:35,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:22:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23471 states and 25345 transitions. [2018-09-10 12:22:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2018-09-10 12:22:35,396 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:35,397 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-10 12:22:35,397 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash -3579083, now seen corresponding path program 1 times [2018-09-10 12:22:35,398 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:35,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:35,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:35,400 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:36,252 WARN L175 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-10 12:22:36,689 WARN L175 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-09-10 12:22:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 732 proven. 285 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2018-09-10 12:22:39,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:39,828 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:22:39,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:39,836 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:40,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-09-10 12:22:41,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-09-10 12:22:41,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:41,646 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 12:22:41,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:41,664 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:42,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-09-10 12:22:43,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1827 backedges. 564 proven. 2 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2018-09-10 12:22:43,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:22:43,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 5, 5] total 21 [2018-09-10 12:22:43,683 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:22:43,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-10 12:22:43,685 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-10 12:22:43,686 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2018-09-10 12:22:43,686 INFO L87 Difference]: Start difference. First operand 23471 states and 25345 transitions. Second operand 15 states. [2018-09-10 12:22:49,437 WARN L175 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2018-09-10 12:22:50,031 WARN L175 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-09-10 12:22:52,293 WARN L175 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-09-10 12:22:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:22:54,702 INFO L93 Difference]: Finished difference Result 48274 states and 53526 transitions. [2018-09-10 12:22:54,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-10 12:22:54,703 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1069 [2018-09-10 12:22:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:22:54,786 INFO L225 Difference]: With dead ends: 48274 [2018-09-10 12:22:54,786 INFO L226 Difference]: Without dead ends: 24814 [2018-09-10 12:22:54,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4348 GetRequests, 4291 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=656, Invalid=2536, Unknown=0, NotChecked=0, Total=3192 [2018-09-10 12:22:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24814 states. [2018-09-10 12:22:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24814 to 23382. [2018-09-10 12:22:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23382 states. [2018-09-10 12:22:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23382 states to 23382 states and 24828 transitions. [2018-09-10 12:22:55,307 INFO L78 Accepts]: Start accepts. Automaton has 23382 states and 24828 transitions. Word has length 1069 [2018-09-10 12:22:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:22:55,308 INFO L480 AbstractCegarLoop]: Abstraction has 23382 states and 24828 transitions. [2018-09-10 12:22:55,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-10 12:22:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 23382 states and 24828 transitions. [2018-09-10 12:22:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1246 [2018-09-10 12:22:55,340 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:22:55,340 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:22:55,341 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:22:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1779460833, now seen corresponding path program 1 times [2018-09-10 12:22:55,341 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:22:55,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:55,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:55,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:22:55,343 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:22:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-09-10 12:22:57,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:57,083 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:22:57,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:57,092 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:22:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:22:57,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:22:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1829 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-09-10 12:22:58,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:22:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-09-10 12:22:59,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:22:59,197 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-09-10 12:22:59,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:22:59,212 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:00,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1829 proven. 2 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2018-09-10 12:23:00,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 598 proven. 449 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2018-09-10 12:23:01,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:23:01,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-10 12:23:01,552 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:23:01,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-10 12:23:01,554 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-10 12:23:01,554 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:23:01,554 INFO L87 Difference]: Start difference. First operand 23382 states and 24828 transitions. Second operand 9 states. [2018-09-10 12:23:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:23:06,975 INFO L93 Difference]: Finished difference Result 42834 states and 45185 transitions. [2018-09-10 12:23:06,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-10 12:23:06,975 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1245 [2018-09-10 12:23:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:23:07,009 INFO L225 Difference]: With dead ends: 42834 [2018-09-10 12:23:07,010 INFO L226 Difference]: Without dead ends: 21536 [2018-09-10 12:23:07,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4996 GetRequests, 4976 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-10 12:23:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21536 states. [2018-09-10 12:23:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21536 to 17974. [2018-09-10 12:23:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17974 states. [2018-09-10 12:23:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17974 states to 17974 states and 18627 transitions. [2018-09-10 12:23:07,301 INFO L78 Accepts]: Start accepts. Automaton has 17974 states and 18627 transitions. Word has length 1245 [2018-09-10 12:23:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:23:07,302 INFO L480 AbstractCegarLoop]: Abstraction has 17974 states and 18627 transitions. [2018-09-10 12:23:07,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-10 12:23:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17974 states and 18627 transitions. [2018-09-10 12:23:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2018-09-10 12:23:07,326 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:23:07,327 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:23:07,327 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:23:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1046593722, now seen corresponding path program 1 times [2018-09-10 12:23:07,328 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:23:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:07,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:07,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:07,329 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:23:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 371 proven. 905 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-09-10 12:23:08,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:08,912 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-10 12:23:08,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:08,922 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:09,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 982 proven. 0 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-09-10 12:23:10,349 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3011 backedges. 371 proven. 905 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-09-10 12:23:12,992 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-10 12:23:12,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2018-09-10 12:23:12,993 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-10 12:23:12,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-10 12:23:12,994 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-10 12:23:12,994 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-09-10 12:23:12,994 INFO L87 Difference]: Start difference. First operand 17974 states and 18627 transitions. Second operand 6 states. [2018-09-10 12:23:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:23:16,269 INFO L93 Difference]: Finished difference Result 36816 states and 38138 transitions. [2018-09-10 12:23:16,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-10 12:23:16,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1246 [2018-09-10 12:23:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:23:16,294 INFO L225 Difference]: With dead ends: 36816 [2018-09-10 12:23:16,294 INFO L226 Difference]: Without dead ends: 18853 [2018-09-10 12:23:16,312 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2501 GetRequests, 2487 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-09-10 12:23:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18853 states. [2018-09-10 12:23:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18853 to 18600. [2018-09-10 12:23:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18600 states. [2018-09-10 12:23:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18600 states to 18600 states and 19252 transitions. [2018-09-10 12:23:16,524 INFO L78 Accepts]: Start accepts. Automaton has 18600 states and 19252 transitions. Word has length 1246 [2018-09-10 12:23:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:23:16,524 INFO L480 AbstractCegarLoop]: Abstraction has 18600 states and 19252 transitions. [2018-09-10 12:23:16,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-10 12:23:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 18600 states and 19252 transitions. [2018-09-10 12:23:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1487 [2018-09-10 12:23:16,548 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:23:16,549 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-10 12:23:16,550 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:23:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1339952544, now seen corresponding path program 1 times [2018-09-10 12:23:16,550 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:23:16,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:16,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:16,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:16,551 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:23:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 472 proven. 2022 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-09-10 12:23:20,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:20,507 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:23:20,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:20,515 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:20,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 1961 proven. 2 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2018-09-10 12:23:22,017 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 457 proven. 1800 refuted. 0 times theorem prover too weak. 1972 trivial. 0 not checked. [2018-09-10 12:23:25,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:25,711 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:23:25,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:25,734 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:26,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 2198 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-09-10 12:23:28,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4229 backedges. 692 proven. 919 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-09-10 12:23:31,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:23:31,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 5] total 24 [2018-09-10 12:23:31,938 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:23:31,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:23:31,940 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:23:31,940 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2018-09-10 12:23:31,940 INFO L87 Difference]: Start difference. First operand 18600 states and 19252 transitions. Second operand 16 states. [2018-09-10 12:23:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:23:45,537 INFO L93 Difference]: Finished difference Result 44563 states and 46128 transitions. [2018-09-10 12:23:45,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-10 12:23:45,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 1486 [2018-09-10 12:23:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:23:45,585 INFO L225 Difference]: With dead ends: 44563 [2018-09-10 12:23:45,586 INFO L226 Difference]: Without dead ends: 26983 [2018-09-10 12:23:45,608 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6027 GetRequests, 5957 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2018-09-10 12:23:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26983 states. [2018-09-10 12:23:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26983 to 25448. [2018-09-10 12:23:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25448 states. [2018-09-10 12:23:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25448 states to 25448 states and 26295 transitions. [2018-09-10 12:23:45,918 INFO L78 Accepts]: Start accepts. Automaton has 25448 states and 26295 transitions. Word has length 1486 [2018-09-10 12:23:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:23:45,919 INFO L480 AbstractCegarLoop]: Abstraction has 25448 states and 26295 transitions. [2018-09-10 12:23:45,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-10 12:23:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 25448 states and 26295 transitions. [2018-09-10 12:23:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1495 [2018-09-10 12:23:45,945 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:23:45,946 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-10 12:23:45,947 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:23:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash 158972880, now seen corresponding path program 1 times [2018-09-10 12:23:45,947 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:23:45,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:45,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:45,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:23:45,948 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:23:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 791 proven. 449 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2018-09-10 12:23:47,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:47,552 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:23:47,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:47,559 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:48,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 2210 proven. 6 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2018-09-10 12:23:49,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 455 proven. 2055 refuted. 0 times theorem prover too weak. 1735 trivial. 0 not checked. [2018-09-10 12:23:53,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:23:53,663 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:23:53,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:23:53,679 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:23:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:23:54,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:23:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 2752 proven. 2 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-09-10 12:23:55,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:23:55,778 WARN L175 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:23:55,942 WARN L175 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-10 12:23:56,394 WARN L175 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-09-10 12:23:56,495 WARN L175 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:23:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4245 backedges. 791 proven. 449 refuted. 0 times theorem prover too weak. 3005 trivial. 0 not checked. [2018-09-10 12:23:57,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:23:57,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8, 5, 5] total 18 [2018-09-10 12:23:57,874 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:23:57,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-10 12:23:57,877 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-10 12:23:57,877 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-09-10 12:23:57,877 INFO L87 Difference]: Start difference. First operand 25448 states and 26295 transitions. Second operand 10 states. [2018-09-10 12:24:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-10 12:24:06,780 INFO L93 Difference]: Finished difference Result 54715 states and 56591 transitions. [2018-09-10 12:24:06,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-10 12:24:06,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1494 [2018-09-10 12:24:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-10 12:24:06,827 INFO L225 Difference]: With dead ends: 54715 [2018-09-10 12:24:06,827 INFO L226 Difference]: Without dead ends: 29613 [2018-09-10 12:24:06,854 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6007 GetRequests, 5971 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2018-09-10 12:24:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29613 states. [2018-09-10 12:24:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29613 to 27830. [2018-09-10 12:24:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27830 states. [2018-09-10 12:24:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27830 states to 27830 states and 28754 transitions. [2018-09-10 12:24:07,242 INFO L78 Accepts]: Start accepts. Automaton has 27830 states and 28754 transitions. Word has length 1494 [2018-09-10 12:24:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-10 12:24:07,242 INFO L480 AbstractCegarLoop]: Abstraction has 27830 states and 28754 transitions. [2018-09-10 12:24:07,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-10 12:24:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 27830 states and 28754 transitions. [2018-09-10 12:24:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1622 [2018-09-10 12:24:07,271 INFO L368 BasicCegarLoop]: Found error trace [2018-09-10 12:24:07,272 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2018-09-10 12:24:07,272 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-10 12:24:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 294142677, now seen corresponding path program 1 times [2018-09-10 12:24:07,273 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-10 12:24:07,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:07,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:07,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-10 12:24:07,273 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-10 12:24:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:08,840 WARN L175 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-10 12:24:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2753 proven. 61 refuted. 0 times theorem prover too weak. 2747 trivial. 0 not checked. [2018-09-10 12:24:11,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:24:11,250 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-10 12:24:11,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:11,258 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:24:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:11,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:24:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2761 proven. 2 refuted. 0 times theorem prover too weak. 2798 trivial. 0 not checked. [2018-09-10 12:24:13,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:24:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 1670 proven. 170 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2018-09-10 12:24:16,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-10 12:24:16,952 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 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 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-10 12:24:16,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-10 12:24:16,968 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-10 12:24:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-10 12:24:18,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-10 12:24:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 2761 proven. 26 refuted. 0 times theorem prover too weak. 2774 trivial. 0 not checked. [2018-09-10 12:24:19,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-10 12:24:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5561 backedges. 1670 proven. 170 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2018-09-10 12:24:23,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-10 12:24:23,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5, 6, 5] total 22 [2018-09-10 12:24:23,118 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-10 12:24:23,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-10 12:24:23,120 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-10 12:24:23,120 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2018-09-10 12:24:23,120 INFO L87 Difference]: Start difference. First operand 27830 states and 28754 transitions. Second operand 16 states. Received shutdown request... [2018-09-10 12:24:38,220 WARN L183 SmtUtils]: Removed 5 from assertion stack [2018-09-10 12:24:38,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-10 12:24:38,221 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-10 12:24:38,225 WARN L206 ceAbstractionStarter]: Timeout [2018-09-10 12:24:38,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 12:24:38 BoogieIcfgContainer [2018-09-10 12:24:38,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-10 12:24:38,226 INFO L168 Benchmark]: Toolchain (without parser) took 230547.79 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 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,227 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-10 12:24:38,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1256.22 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 198.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,229 INFO L168 Benchmark]: Boogie Preprocessor took 451.04 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -973.0 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,229 INFO L168 Benchmark]: RCFGBuilder took 6596.96 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 278.0 MB). Peak memory consumption was 278.0 MB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,230 INFO L168 Benchmark]: TraceAbstraction took 222038.53 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -692.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-10 12:24:38,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1256.22 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: 97.8 MB). Peak memory consumption was 97.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 198.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 451.04 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -973.0 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6596.96 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 278.0 MB). Peak memory consumption was 278.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222038.53 ms. Allocated memory was 2.4 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.7 GB in the end (delta: -692.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 166]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 166). Cancelled while BasicCegarLoop was constructing difference of abstraction (27830states) and FLOYD_HOARE automaton (currently 34 states, 16 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 25. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 221.9s OverallTime, 17 OverallIterations, 10 TraceHistogramMax, 131.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2132 SDtfs, 37817 SDslu, 3394 SDs, 0 SdLazy, 77264 SolverSat, 10106 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 102.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44575 GetRequests, 44170 SyntacticMatches, 69 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 17.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29658occurred in iteration=10, 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: 4.8s AutomataMinimizationTime, 16 MinimizatonAttempts, 11450 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 10.5s SatisfiabilityAnalysisTime, 60.7s InterpolantComputationTime, 34917 NumberOfCodeBlocks, 34917 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 56934 ConstructedInterpolants, 0 QuantifiedInterpolants, 218167636 SizeOfPredicates, 35 NumberOfNonLiveVariables, 29089 ConjunctsInSsa, 226 ConjunctsInUnsatCore, 63 InterpolantComputations, 9 PerfectInterpolantSequences, 109019/121918 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label45_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-10_12-24-38-247.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label45_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-10_12-24-38-247.csv Completed graceful shutdown