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/Problem14_label03_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ddc4263 [2018-08-07 12:36:44,816 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-08-07 12:36:44,818 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-08-07 12:36:44,831 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-08-07 12:36:44,831 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-08-07 12:36:44,832 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-08-07 12:36:44,834 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-08-07 12:36:44,836 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-08-07 12:36:44,838 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-08-07 12:36:44,838 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-08-07 12:36:44,839 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-08-07 12:36:44,840 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-08-07 12:36:44,841 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-08-07 12:36:44,842 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-08-07 12:36:44,843 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-08-07 12:36:44,844 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-08-07 12:36:44,845 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-08-07 12:36:44,847 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-08-07 12:36:44,849 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-08-07 12:36:44,851 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-08-07 12:36:44,852 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-08-07 12:36:44,853 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-08-07 12:36:44,856 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-08-07 12:36:44,865 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-08-07 12:36:44,894 INFO L110 SettingsManager]: Loading preferences was successful [2018-08-07 12:36:44,894 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-08-07 12:36:44,895 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-08-07 12:36:44,896 INFO L133 SettingsManager]: * User list type=DISABLED [2018-08-07 12:36:44,896 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-08-07 12:36:44,896 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-08-07 12:36:44,896 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-08-07 12:36:44,897 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-08-07 12:36:44,897 INFO L133 SettingsManager]: * Log string format=TERM [2018-08-07 12:36:44,897 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-08-07 12:36:44,897 INFO L133 SettingsManager]: * Interval Domain=false [2018-08-07 12:36:44,898 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-08-07 12:36:44,899 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-08-07 12:36:44,899 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-08-07 12:36:44,899 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-08-07 12:36:44,900 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-08-07 12:36:44,900 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-08-07 12:36:44,900 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-08-07 12:36:44,900 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-08-07 12:36:44,900 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-08-07 12:36:44,901 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-08-07 12:36:44,901 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-08-07 12:36:44,901 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-08-07 12:36:44,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:36:44,903 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-08-07 12:36:44,903 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-08-07 12:36:44,903 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-08-07 12:36:44,903 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-08-07 12:36:44,904 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-08-07 12:36:44,904 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-08-07 12:36:44,904 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-08-07 12:36:44,904 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-08-07 12:36:44,905 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-08-07 12:36:44,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-08-07 12:36:44,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-08-07 12:36:44,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-08-07 12:36:44,979 INFO L271 PluginConnector]: Initializing CDTParser... [2018-08-07 12:36:44,979 INFO L276 PluginConnector]: CDTParser initialized [2018-08-07 12:36:44,980 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03_true-unreach-call_false-termination.c [2018-08-07 12:36:45,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e1c6c8/73ae1b4647b84d72825497b0c7e7136b/FLAG3d1c9e0f7 [2018-08-07 12:36:45,641 INFO L276 CDTParser]: Found 1 translation units. [2018-08-07 12:36:45,643 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03_true-unreach-call_false-termination.c [2018-08-07 12:36:45,670 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e1c6c8/73ae1b4647b84d72825497b0c7e7136b/FLAG3d1c9e0f7 [2018-08-07 12:36:45,695 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf5e1c6c8/73ae1b4647b84d72825497b0c7e7136b [2018-08-07 12:36:45,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-08-07 12:36:45,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-08-07 12:36:45,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-08-07 12:36:45,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-08-07 12:36:45,721 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-08-07 12:36:45,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:36:45" (1/1) ... [2018-08-07 12:36:45,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be461d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:45, skipping insertion in model container [2018-08-07 12:36:45,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.08 12:36:45" (1/1) ... [2018-08-07 12:36:45,987 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-08-07 12:36:46,357 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:36:46,376 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-08-07 12:36:46,550 INFO L175 PostProcessor]: Settings: Checked method=main [2018-08-07 12:36:46,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46 WrapperNode [2018-08-07 12:36:46,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-08-07 12:36:46,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-08-07 12:36:46,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-08-07 12:36:46,625 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-08-07 12:36:46,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-08-07 12:36:46,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-08-07 12:36:46,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-08-07 12:36:46,764 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-08-07 12:36:46,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:46,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:47,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... [2018-08-07 12:36:47,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-08-07 12:36:47,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-08-07 12:36:47,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-08-07 12:36:47,019 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-08-07 12:36:47,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-08-07 12:36:47,093 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:36:47,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-08-07 12:36:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-08-07 12:36:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-08-07 12:36:47,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-08-07 12:36:47,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-08-07 12:36:47,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-08-07 12:36:47,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-08-07 12:36:50,938 INFO L273 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-08-07 12:36:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:36:50 BoogieIcfgContainer [2018-08-07 12:36:50,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-08-07 12:36:50,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-08-07 12:36:50,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-08-07 12:36:50,944 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-08-07 12:36:50,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.08 12:36:45" (1/3) ... [2018-08-07 12:36:50,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c139a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:36:50, skipping insertion in model container [2018-08-07 12:36:50,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.08 12:36:46" (2/3) ... [2018-08-07 12:36:50,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c139a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.08 12:36:50, skipping insertion in model container [2018-08-07 12:36:50,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.08 12:36:50" (3/3) ... [2018-08-07 12:36:50,948 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label03_true-unreach-call_false-termination.c [2018-08-07 12:36:50,959 INFO L133 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-08-07 12:36:50,968 INFO L145 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-08-07 12:36:51,020 INFO L129 ementStrategyFactory]: Using default assertion order modulation [2018-08-07 12:36:51,021 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-08-07 12:36:51,021 INFO L382 AbstractCegarLoop]: Hoare is true [2018-08-07 12:36:51,021 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-08-07 12:36:51,021 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-08-07 12:36:51,022 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-08-07 12:36:51,022 INFO L386 AbstractCegarLoop]: Difference is false [2018-08-07 12:36:51,022 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-08-07 12:36:51,022 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-08-07 12:36:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-08-07 12:36:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-08-07 12:36:51,062 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:36:51,063 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] [2018-08-07 12:36:51,064 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:36:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1455829652, now seen corresponding path program 1 times [2018-08-07 12:36:51,076 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:36:51,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:51,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:36:51,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:51,132 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:36:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:36:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:36:51,573 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:36:51,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-08-07 12:36:51,573 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:36:51,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:36:51,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:36:51,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:36:51,602 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-08-07 12:36:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:36:53,349 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-08-07 12:36:53,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:36:53,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2018-08-07 12:36:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:36:53,371 INFO L225 Difference]: With dead ends: 691 [2018-08-07 12:36:53,371 INFO L226 Difference]: Without dead ends: 434 [2018-08-07 12:36:53,378 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-08-07 12:36:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-08-07 12:36:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-08-07 12:36:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-08-07 12:36:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-08-07 12:36:53,459 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 58 [2018-08-07 12:36:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:36:53,460 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-08-07 12:36:53,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:36:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-08-07 12:36:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-08-07 12:36:53,467 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:36:53,467 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:36:53,468 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:36:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1825091112, now seen corresponding path program 1 times [2018-08-07 12:36:53,468 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:36:53,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:53,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:36:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:53,470 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:36:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:36:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:36:53,823 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:36:53,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-08-07 12:36:53,824 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:36:53,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:36:53,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:36:53,827 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-08-07 12:36:53,827 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-08-07 12:36:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:36:57,948 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-08-07 12:36:57,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:36:57,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-08-07 12:36:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:36:57,961 INFO L225 Difference]: With dead ends: 1588 [2018-08-07 12:36:57,962 INFO L226 Difference]: Without dead ends: 1160 [2018-08-07 12:36:57,966 INFO L603 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 [2018-08-07 12:36:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-08-07 12:36:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-08-07 12:36:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-08-07 12:36:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-08-07 12:36:58,033 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 128 [2018-08-07 12:36:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:36:58,034 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-08-07 12:36:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:36:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-08-07 12:36:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-08-07 12:36:58,046 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:36:58,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:36:58,046 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:36:58,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1729363299, now seen corresponding path program 1 times [2018-08-07 12:36:58,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:36:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:58,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:36:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:36:58,049 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:36:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:36:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:36:58,306 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:36:58,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:36:58,306 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:36:58,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:36:58,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:36:58,307 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:36:58,307 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-08-07 12:37:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:01,209 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-08-07 12:37:01,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:37:01,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2018-08-07 12:37:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:01,229 INFO L225 Difference]: With dead ends: 2716 [2018-08-07 12:37:01,229 INFO L226 Difference]: Without dead ends: 1569 [2018-08-07 12:37:01,234 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:37:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-08-07 12:37:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-08-07 12:37:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-08-07 12:37:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-08-07 12:37:01,290 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 129 [2018-08-07 12:37:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:01,291 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-08-07 12:37:01,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:37:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-08-07 12:37:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-08-07 12:37:01,293 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:01,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:01,294 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1427880185, now seen corresponding path program 1 times [2018-08-07 12:37:01,295 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:01,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:01,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:01,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:01,296 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:37:01,458 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:37:01,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-08-07 12:37:01,459 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:37:01,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:37:01,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:37:01,460 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-08-07 12:37:01,460 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-08-07 12:37:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:04,162 INFO L93 Difference]: Finished difference Result 4907 states and 7504 transitions. [2018-08-07 12:37:04,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:37:04,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2018-08-07 12:37:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:04,196 INFO L225 Difference]: With dead ends: 4907 [2018-08-07 12:37:04,196 INFO L226 Difference]: Without dead ends: 3375 [2018-08-07 12:37:04,210 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:37:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2018-08-07 12:37:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3262. [2018-08-07 12:37:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3262 states. [2018-08-07 12:37:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 4436 transitions. [2018-08-07 12:37:04,316 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 4436 transitions. Word has length 131 [2018-08-07 12:37:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:04,316 INFO L480 AbstractCegarLoop]: Abstraction has 3262 states and 4436 transitions. [2018-08-07 12:37:04,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:37:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 4436 transitions. [2018-08-07 12:37:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-08-07 12:37:04,320 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:04,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:04,320 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 572547600, now seen corresponding path program 1 times [2018-08-07 12:37:04,321 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:04,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:04,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:04,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:04,322 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:37:04,522 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-08-07 12:37:04,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-08-07 12:37:04,522 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:37:04,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-08-07 12:37:04,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-08-07 12:37:04,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:37:04,524 INFO L87 Difference]: Start difference. First operand 3262 states and 4436 transitions. Second operand 4 states. [2018-08-07 12:37:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:06,953 INFO L93 Difference]: Finished difference Result 8795 states and 12468 transitions. [2018-08-07 12:37:06,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-08-07 12:37:06,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-08-07 12:37:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:06,988 INFO L225 Difference]: With dead ends: 8795 [2018-08-07 12:37:06,988 INFO L226 Difference]: Without dead ends: 5539 [2018-08-07 12:37:07,009 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-08-07 12:37:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2018-08-07 12:37:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 5539. [2018-08-07 12:37:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5539 states. [2018-08-07 12:37:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 7494 transitions. [2018-08-07 12:37:07,162 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 7494 transitions. Word has length 132 [2018-08-07 12:37:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:07,163 INFO L480 AbstractCegarLoop]: Abstraction has 5539 states and 7494 transitions. [2018-08-07 12:37:07,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-08-07 12:37:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 7494 transitions. [2018-08-07 12:37:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-08-07 12:37:07,184 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:07,185 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:37:07,185 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash -466363196, now seen corresponding path program 1 times [2018-08-07 12:37:07,185 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:07,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:07,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:07,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:07,187 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:07,843 WARN L170 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:37:08,260 WARN L170 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-08-07 12:37:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:37:08,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:08,985 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:37:09,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:09,001 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:09,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-08-07 12:37:09,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-08-07 12:37:09,955 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-08-07 12:37:09,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 12 [2018-08-07 12:37:09,955 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:37:09,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-08-07 12:37:09,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-08-07 12:37:09,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:37:09,957 INFO L87 Difference]: Start difference. First operand 5539 states and 7494 transitions. Second operand 3 states. [2018-08-07 12:37:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:12,107 INFO L93 Difference]: Finished difference Result 12598 states and 17780 transitions. [2018-08-07 12:37:12,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-08-07 12:37:12,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2018-08-07 12:37:12,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:12,147 INFO L225 Difference]: With dead ends: 12598 [2018-08-07 12:37:12,147 INFO L226 Difference]: Without dead ends: 7065 [2018-08-07 12:37:12,206 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 550 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:37:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2018-08-07 12:37:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 7060. [2018-08-07 12:37:12,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7060 states. [2018-08-07 12:37:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 9592 transitions. [2018-08-07 12:37:12,466 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 9592 transitions. Word has length 276 [2018-08-07 12:37:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:12,466 INFO L480 AbstractCegarLoop]: Abstraction has 7060 states and 9592 transitions. [2018-08-07 12:37:12,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-08-07 12:37:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 9592 transitions. [2018-08-07 12:37:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-08-07 12:37:12,491 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:12,492 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:37:12,492 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1750776181, now seen corresponding path program 1 times [2018-08-07 12:37:12,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:12,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:12,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:12,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:12,494 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:12,841 WARN L170 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-08-07 12:37:13,079 WARN L170 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-08-07 12:37:13,744 WARN L170 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-08-07 12:37:14,009 WARN L170 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-08-07 12:37:14,673 WARN L170 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-08-07 12:37:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:37:14,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:14,859 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:37:14,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:14,867 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:14,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-08-07 12:37:15,251 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:15,577 WARN L170 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-08-07 12:37:15,719 WARN L170 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-08-07 12:37:15,823 WARN L170 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-08-07 12:37:16,222 WARN L170 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-08-07 12:37:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 102 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:37:16,978 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:37:16,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-08-07 12:37:16,978 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:37:16,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:37:16,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:37:16,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:37:16,980 INFO L87 Difference]: Start difference. First operand 7060 states and 9592 transitions. Second operand 5 states. [2018-08-07 12:37:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:22,179 INFO L93 Difference]: Finished difference Result 16084 states and 21759 transitions. [2018-08-07 12:37:22,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-08-07 12:37:22,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2018-08-07 12:37:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:22,238 INFO L225 Difference]: With dead ends: 16084 [2018-08-07 12:37:22,238 INFO L226 Difference]: Without dead ends: 9030 [2018-08-07 12:37:22,260 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 597 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-08-07 12:37:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2018-08-07 12:37:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 8088. [2018-08-07 12:37:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8088 states. [2018-08-07 12:37:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8088 states to 8088 states and 10793 transitions. [2018-08-07 12:37:22,488 INFO L78 Accepts]: Start accepts. Automaton has 8088 states and 10793 transitions. Word has length 301 [2018-08-07 12:37:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:22,488 INFO L480 AbstractCegarLoop]: Abstraction has 8088 states and 10793 transitions. [2018-08-07 12:37:22,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:37:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8088 states and 10793 transitions. [2018-08-07 12:37:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-08-07 12:37:22,518 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:22,519 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:22,519 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash 516035528, now seen corresponding path program 1 times [2018-08-07 12:37:22,519 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:22,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:22,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:22,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:22,521 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:23,029 WARN L170 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:37:23,244 WARN L170 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:37:23,462 WARN L170 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-08-07 12:37:23,797 WARN L170 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-08-07 12:37:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 241 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:37:24,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:24,287 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:37:24,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:24,295 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:24,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 331 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-08-07 12:37:24,802 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 163 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:37:25,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:25,402 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:37:25,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:25,417 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:25,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 331 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-08-07 12:37:26,245 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 163 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-08-07 12:37:26,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:37:26,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-08-07 12:37:26,917 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:37:26,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-08-07 12:37:26,918 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-08-07 12:37:26,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-08-07 12:37:26,919 INFO L87 Difference]: Start difference. First operand 8088 states and 10793 transitions. Second operand 15 states. [2018-08-07 12:37:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:34,123 INFO L93 Difference]: Finished difference Result 16168 states and 21852 transitions. [2018-08-07 12:37:34,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-08-07 12:37:34,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 386 [2018-08-07 12:37:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:34,153 INFO L225 Difference]: With dead ends: 16168 [2018-08-07 12:37:34,153 INFO L226 Difference]: Without dead ends: 8253 [2018-08-07 12:37:34,172 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 1541 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-08-07 12:37:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8253 states. [2018-08-07 12:37:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8253 to 7772. [2018-08-07 12:37:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7772 states. [2018-08-07 12:37:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7772 states to 7772 states and 9795 transitions. [2018-08-07 12:37:34,331 INFO L78 Accepts]: Start accepts. Automaton has 7772 states and 9795 transitions. Word has length 386 [2018-08-07 12:37:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:34,331 INFO L480 AbstractCegarLoop]: Abstraction has 7772 states and 9795 transitions. [2018-08-07 12:37:34,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-08-07 12:37:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7772 states and 9795 transitions. [2018-08-07 12:37:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-08-07 12:37:34,360 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:34,361 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:34,361 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1658686337, now seen corresponding path program 1 times [2018-08-07 12:37:34,361 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:34,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:34,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:34,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:34,363 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:34,754 WARN L170 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-08-07 12:37:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 268 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-08-07 12:37:36,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:36,442 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:37:36,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:36,450 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:36,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-08-07 12:37:37,382 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 153 proven. 210 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-08-07 12:37:37,772 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-08-07 12:37:37,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [15, 5] total 19 [2018-08-07 12:37:37,773 INFO L262 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-08-07 12:37:37,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-08-07 12:37:37,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-08-07 12:37:37,774 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-08-07 12:37:37,774 INFO L87 Difference]: Start difference. First operand 7772 states and 9795 transitions. Second operand 5 states. [2018-08-07 12:37:40,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:40,537 INFO L93 Difference]: Finished difference Result 20571 states and 26469 transitions. [2018-08-07 12:37:40,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-08-07 12:37:40,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2018-08-07 12:37:40,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:40,584 INFO L225 Difference]: With dead ends: 20571 [2018-08-07 12:37:40,584 INFO L226 Difference]: Without dead ends: 12805 [2018-08-07 12:37:40,616 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 817 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:37:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12805 states. [2018-08-07 12:37:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12805 to 12679. [2018-08-07 12:37:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12679 states. [2018-08-07 12:37:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12679 states to 12679 states and 15899 transitions. [2018-08-07 12:37:40,908 INFO L78 Accepts]: Start accepts. Automaton has 12679 states and 15899 transitions. Word has length 411 [2018-08-07 12:37:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:40,909 INFO L480 AbstractCegarLoop]: Abstraction has 12679 states and 15899 transitions. [2018-08-07 12:37:40,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-08-07 12:37:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 12679 states and 15899 transitions. [2018-08-07 12:37:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-08-07 12:37:40,963 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:40,963 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:40,964 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1714561176, now seen corresponding path program 1 times [2018-08-07 12:37:40,964 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:40,966 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:41,896 WARN L170 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-08-07 12:37:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:37:42,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:42,220 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:37:42,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:42,228 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:42,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:37:42,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:37:43,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:43,051 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-08-07 12:37:43,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:43,066 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:43,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:37:43,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 542 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-08-07 12:37:44,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:37:44,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 5, 5] total 12 [2018-08-07 12:37:44,075 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:37:44,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-08-07 12:37:44,076 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-08-07 12:37:44,076 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-08-07 12:37:44,077 INFO L87 Difference]: Start difference. First operand 12679 states and 15899 transitions. Second operand 10 states. [2018-08-07 12:37:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:48,197 INFO L93 Difference]: Finished difference Result 22280 states and 28600 transitions. [2018-08-07 12:37:48,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-08-07 12:37:48,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 522 [2018-08-07 12:37:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:48,228 INFO L225 Difference]: With dead ends: 22280 [2018-08-07 12:37:48,229 INFO L226 Difference]: Without dead ends: 9607 [2018-08-07 12:37:48,268 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2123 GetRequests, 2092 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2018-08-07 12:37:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9607 states. [2018-08-07 12:37:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9607 to 9228. [2018-08-07 12:37:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9228 states. [2018-08-07 12:37:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 10992 transitions. [2018-08-07 12:37:48,424 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 10992 transitions. Word has length 522 [2018-08-07 12:37:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:48,426 INFO L480 AbstractCegarLoop]: Abstraction has 9228 states and 10992 transitions. [2018-08-07 12:37:48,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-08-07 12:37:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 10992 transitions. [2018-08-07 12:37:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2018-08-07 12:37:48,448 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:48,448 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:37:48,448 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash -37262620, now seen corresponding path program 1 times [2018-08-07 12:37:48,449 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:48,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:48,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:48,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:48,450 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:48,810 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-08-07 12:37:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 331 proven. 501 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-08-07 12:37:50,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:50,026 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-08-07 12:37:50,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:50,034 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:50,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 725 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-08-07 12:37:50,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 436 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-08-07 12:37:50,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:37:50,975 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:37:50,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:50,990 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:37:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:37:51,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:37:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 719 proven. 8 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-08-07 12:37:52,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:37:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 436 proven. 129 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-08-07 12:37:53,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:37:53,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 8, 5] total 24 [2018-08-07 12:37:53,044 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:37:53,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-08-07 12:37:53,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-08-07 12:37:53,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2018-08-07 12:37:53,046 INFO L87 Difference]: Start difference. First operand 9228 states and 10992 transitions. Second operand 14 states. [2018-08-07 12:37:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:37:59,508 INFO L93 Difference]: Finished difference Result 18632 states and 22674 transitions. [2018-08-07 12:37:59,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-08-07 12:37:59,508 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 540 [2018-08-07 12:37:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:37:59,542 INFO L225 Difference]: With dead ends: 18632 [2018-08-07 12:37:59,543 INFO L226 Difference]: Without dead ends: 9782 [2018-08-07 12:37:59,563 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 2173 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2018-08-07 12:37:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9782 states. [2018-08-07 12:37:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9782 to 9533. [2018-08-07 12:37:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9533 states. [2018-08-07 12:37:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9533 states to 9533 states and 10939 transitions. [2018-08-07 12:37:59,841 INFO L78 Accepts]: Start accepts. Automaton has 9533 states and 10939 transitions. Word has length 540 [2018-08-07 12:37:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:37:59,842 INFO L480 AbstractCegarLoop]: Abstraction has 9533 states and 10939 transitions. [2018-08-07 12:37:59,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-08-07 12:37:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9533 states and 10939 transitions. [2018-08-07 12:37:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2018-08-07 12:37:59,877 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:37:59,877 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 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] [2018-08-07 12:37:59,878 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:37:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1504166415, now seen corresponding path program 1 times [2018-08-07 12:37:59,878 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:37:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:59,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:37:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:37:59,880 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:37:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 586 proven. 499 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-08-07 12:38:01,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:01,439 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:38:01,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:01,447 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:01,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 949 proven. 2 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-08-07 12:38:02,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 580 proven. 129 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-08-07 12:38:02,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:02,974 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:38:02,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:02,991 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:03,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 741 proven. 210 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-08-07 12:38:03,952 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1277 backedges. 291 proven. 707 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-08-07 12:38:04,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:38:04,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-08-07 12:38:04,909 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:38:04,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-08-07 12:38:04,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-08-07 12:38:04,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-08-07 12:38:04,912 INFO L87 Difference]: Start difference. First operand 9533 states and 10939 transitions. Second operand 13 states. [2018-08-07 12:38:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:38:08,725 INFO L93 Difference]: Finished difference Result 18957 states and 22470 transitions. [2018-08-07 12:38:08,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-08-07 12:38:08,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 625 [2018-08-07 12:38:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:38:08,762 INFO L225 Difference]: With dead ends: 18957 [2018-08-07 12:38:08,762 INFO L226 Difference]: Without dead ends: 9677 [2018-08-07 12:38:08,783 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2489 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-08-07 12:38:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9677 states. [2018-08-07 12:38:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9677 to 9503. [2018-08-07 12:38:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9503 states. [2018-08-07 12:38:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9503 states to 9503 states and 10696 transitions. [2018-08-07 12:38:08,960 INFO L78 Accepts]: Start accepts. Automaton has 9503 states and 10696 transitions. Word has length 625 [2018-08-07 12:38:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:38:08,961 INFO L480 AbstractCegarLoop]: Abstraction has 9503 states and 10696 transitions. [2018-08-07 12:38:08,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-08-07 12:38:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 9503 states and 10696 transitions. [2018-08-07 12:38:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-08-07 12:38:08,979 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:38:08,980 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 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] [2018-08-07 12:38:08,980 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:38:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1361665915, now seen corresponding path program 2 times [2018-08-07 12:38:08,981 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:38:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:08,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:08,982 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:38:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:09,698 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:38:09,915 WARN L170 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-08-07 12:38:10,272 WARN L170 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2018-08-07 12:38:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 612 proven. 551 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-08-07 12:38:11,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:11,261 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:38:11,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:38:11,268 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:38:11,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:38:11,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:38:11,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-08-07 12:38:12,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:12,663 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-08-07 12:38:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 606 proven. 129 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-08-07 12:38:13,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:13,518 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:38:13,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-08-07 12:38:13,534 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-08-07 12:38:14,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-08-07 12:38:14,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-08-07 12:38:14,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:14,562 WARN L170 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-08-07 12:38:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 995 proven. 8 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-08-07 12:38:15,724 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:16,113 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-08-07 12:38:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 285 proven. 765 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-08-07 12:38:18,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:38:18,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 11, 11] total 32 [2018-08-07 12:38:18,233 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:38:18,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-08-07 12:38:18,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-08-07 12:38:18,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2018-08-07 12:38:18,235 INFO L87 Difference]: Start difference. First operand 9503 states and 10696 transitions. Second operand 18 states. [2018-08-07 12:38:20,528 WARN L170 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-08-07 12:38:22,497 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-08-07 12:38:23,181 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-08-07 12:38:23,350 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-08-07 12:38:23,694 WARN L170 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-08-07 12:38:23,975 WARN L170 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-08-07 12:38:26,842 WARN L170 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-08-07 12:38:27,053 WARN L170 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-08-07 12:38:27,482 WARN L170 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2018-08-07 12:38:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:38:28,145 INFO L93 Difference]: Finished difference Result 23103 states and 26434 transitions. [2018-08-07 12:38:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-08-07 12:38:28,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 651 [2018-08-07 12:38:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:38:28,175 INFO L225 Difference]: With dead ends: 23103 [2018-08-07 12:38:28,175 INFO L226 Difference]: Without dead ends: 13606 [2018-08-07 12:38:28,195 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2681 GetRequests, 2600 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=822, Invalid=3734, Unknown=0, NotChecked=0, Total=4556 [2018-08-07 12:38:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2018-08-07 12:38:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12380. [2018-08-07 12:38:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12380 states. [2018-08-07 12:38:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 13747 transitions. [2018-08-07 12:38:28,393 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 13747 transitions. Word has length 651 [2018-08-07 12:38:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:38:28,394 INFO L480 AbstractCegarLoop]: Abstraction has 12380 states and 13747 transitions. [2018-08-07 12:38:28,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-08-07 12:38:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 13747 transitions. [2018-08-07 12:38:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-08-07 12:38:28,409 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:38:28,410 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:38:28,410 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:38:28,411 INFO L82 PathProgramCache]: Analyzing trace with hash -939300679, now seen corresponding path program 1 times [2018-08-07 12:38:28,411 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:38:28,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:28,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-08-07 12:38:28,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:28,412 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:38:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:38:29,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:29,335 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:38:29,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:29,343 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:29,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-08-07 12:38:29,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:38:30,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:30,242 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:38:30,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:30,258 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:30,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-08-07 12:38:31,004 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 613 proven. 129 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-08-07 12:38:31,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:38:31,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-08-07 12:38:31,315 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:38:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-08-07 12:38:31,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-08-07 12:38:31,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-08-07 12:38:31,317 INFO L87 Difference]: Start difference. First operand 12380 states and 13747 transitions. Second operand 7 states. [2018-08-07 12:38:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:38:33,962 INFO L93 Difference]: Finished difference Result 29579 states and 35681 transitions. [2018-08-07 12:38:33,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-08-07 12:38:33,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 707 [2018-08-07 12:38:33,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:38:34,041 INFO L225 Difference]: With dead ends: 29579 [2018-08-07 12:38:34,041 INFO L226 Difference]: Without dead ends: 17390 [2018-08-07 12:38:34,088 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 2844 GetRequests, 2829 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-08-07 12:38:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17390 states. [2018-08-07 12:38:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17390 to 16908. [2018-08-07 12:38:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16908 states. [2018-08-07 12:38:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 19011 transitions. [2018-08-07 12:38:34,480 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 19011 transitions. Word has length 707 [2018-08-07 12:38:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:38:34,482 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 19011 transitions. [2018-08-07 12:38:34,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-08-07 12:38:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 19011 transitions. [2018-08-07 12:38:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2018-08-07 12:38:34,505 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:38:34,506 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:38:34,506 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:38:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash -208165032, now seen corresponding path program 1 times [2018-08-07 12:38:34,507 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:38:34,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:34,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:34,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:34,508 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:38:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 894 proven. 857 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2018-08-07 12:38:36,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:36,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:38:36,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:36,320 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:36,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1435 proven. 2 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2018-08-07 12:38:36,978 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:37,166 WARN L170 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-08-07 12:38:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 887 proven. 129 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2018-08-07 12:38:38,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:38,240 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:38:38,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:38,255 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:38,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 1427 proven. 10 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2018-08-07 12:38:39,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2350 backedges. 387 proven. 1097 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2018-08-07 12:38:41,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:38:41,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5, 8, 8] total 28 [2018-08-07 12:38:41,235 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:38:41,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:38:41,236 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:38:41,236 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2018-08-07 12:38:41,237 INFO L87 Difference]: Start difference. First operand 16908 states and 19011 transitions. Second operand 17 states. [2018-08-07 12:38:49,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:38:49,953 INFO L93 Difference]: Finished difference Result 33743 states and 39406 transitions. [2018-08-07 12:38:49,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-08-07 12:38:49,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 814 [2018-08-07 12:38:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:38:50,014 INFO L225 Difference]: With dead ends: 33743 [2018-08-07 12:38:50,014 INFO L226 Difference]: Without dead ends: 16168 [2018-08-07 12:38:50,065 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3339 GetRequests, 3261 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2018-08-07 12:38:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16168 states. [2018-08-07 12:38:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16168 to 15726. [2018-08-07 12:38:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15726 states. [2018-08-07 12:38:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15726 states to 15726 states and 17304 transitions. [2018-08-07 12:38:50,374 INFO L78 Accepts]: Start accepts. Automaton has 15726 states and 17304 transitions. Word has length 814 [2018-08-07 12:38:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:38:50,375 INFO L480 AbstractCegarLoop]: Abstraction has 15726 states and 17304 transitions. [2018-08-07 12:38:50,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-08-07 12:38:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 15726 states and 17304 transitions. [2018-08-07 12:38:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-08-07 12:38:50,391 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:38:50,392 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:38:50,392 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:38:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1812461801, now seen corresponding path program 1 times [2018-08-07 12:38:50,392 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:38:50,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:50,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:50,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:50,394 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:38:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-08-07 12:38:51,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:51,205 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-08-07 12:38:51,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:51,212 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:51,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1359 proven. 2 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2018-08-07 12:38:51,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-08-07 12:38:52,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:52,251 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-08-07 12:38:52,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:52,350 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:52,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 1359 proven. 2 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2018-08-07 12:38:53,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:38:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 832 proven. 129 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2018-08-07 12:38:53,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:38:53,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-08-07 12:38:53,688 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:38:53,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-08-07 12:38:53,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-08-07 12:38:53,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-08-07 12:38:53,690 INFO L87 Difference]: Start difference. First operand 15726 states and 17304 transitions. Second operand 6 states. [2018-08-07 12:38:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:38:56,279 INFO L93 Difference]: Finished difference Result 32607 states and 35912 transitions. [2018-08-07 12:38:56,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-08-07 12:38:56,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 867 [2018-08-07 12:38:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:38:56,316 INFO L225 Difference]: With dead ends: 32607 [2018-08-07 12:38:56,316 INFO L226 Difference]: Without dead ends: 17072 [2018-08-07 12:38:56,351 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3481 GetRequests, 3468 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:38:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17072 states. [2018-08-07 12:38:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17072 to 16308. [2018-08-07 12:38:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16308 states. [2018-08-07 12:38:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16308 states to 16308 states and 17667 transitions. [2018-08-07 12:38:56,615 INFO L78 Accepts]: Start accepts. Automaton has 16308 states and 17667 transitions. Word has length 867 [2018-08-07 12:38:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:38:56,616 INFO L480 AbstractCegarLoop]: Abstraction has 16308 states and 17667 transitions. [2018-08-07 12:38:56,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-08-07 12:38:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 16308 states and 17667 transitions. [2018-08-07 12:38:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2018-08-07 12:38:56,633 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:38:56,634 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:38:56,634 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:38:56,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1008860009, now seen corresponding path program 1 times [2018-08-07 12:38:56,635 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:38:56,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:56,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:56,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:38:56,636 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:38:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 931 proven. 973 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2018-08-07 12:38:58,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:38:58,653 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-08-07 12:38:58,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:38:58,661 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:38:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:38:58,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:38:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 1551 proven. 2 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2018-08-07 12:38:59,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 947 proven. 129 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:39:00,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:00,414 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-08-07 12:39:00,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:00,437 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:01,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 1546 proven. 25 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2018-08-07 12:39:01,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 947 proven. 129 refuted. 0 times theorem prover too weak. 1515 trivial. 0 not checked. [2018-08-07 12:39:02,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:39:02,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-08-07 12:39:02,383 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:39:02,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-08-07 12:39:02,386 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-08-07 12:39:02,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:39:02,386 INFO L87 Difference]: Start difference. First operand 16308 states and 17667 transitions. Second operand 17 states. [2018-08-07 12:39:06,015 WARN L170 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-08-07 12:39:07,106 WARN L170 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-08-07 12:39:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:11,629 INFO L93 Difference]: Finished difference Result 33124 states and 36883 transitions. [2018-08-07 12:39:11,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-08-07 12:39:11,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 923 [2018-08-07 12:39:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:11,674 INFO L225 Difference]: With dead ends: 33124 [2018-08-07 12:39:11,674 INFO L226 Difference]: Without dead ends: 17007 [2018-08-07 12:39:11,699 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 3784 GetRequests, 3719 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=969, Invalid=3453, Unknown=0, NotChecked=0, Total=4422 [2018-08-07 12:39:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17007 states. [2018-08-07 12:39:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17007 to 16286. [2018-08-07 12:39:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16286 states. [2018-08-07 12:39:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16286 states to 16286 states and 17566 transitions. [2018-08-07 12:39:11,952 INFO L78 Accepts]: Start accepts. Automaton has 16286 states and 17566 transitions. Word has length 923 [2018-08-07 12:39:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:11,953 INFO L480 AbstractCegarLoop]: Abstraction has 16286 states and 17566 transitions. [2018-08-07 12:39:11,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-08-07 12:39:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16286 states and 17566 transitions. [2018-08-07 12:39:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1045 [2018-08-07 12:39:11,967 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:11,968 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, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:39:11,968 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash -29720964, now seen corresponding path program 1 times [2018-08-07 12:39:11,968 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:11,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:11,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:11,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:11,970 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-08-07 12:39:12,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:12,984 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-08-07 12:39:12,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:12,991 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:13,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-08-07 12:39:13,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 129 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-08-07 12:39:14,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:14,662 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 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 [2018-08-07 12:39:14,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:14,678 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:15,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 6 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2018-08-07 12:39:15,877 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3225 backedges. 1728 proven. 129 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2018-08-07 12:39:16,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:39:16,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 13 [2018-08-07 12:39:16,730 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:39:16,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-08-07 12:39:16,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-08-07 12:39:16,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-08-07 12:39:16,732 INFO L87 Difference]: Start difference. First operand 16286 states and 17566 transitions. Second operand 8 states. [2018-08-07 12:39:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:20,763 INFO L93 Difference]: Finished difference Result 37276 states and 40263 transitions. [2018-08-07 12:39:20,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-08-07 12:39:20,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1044 [2018-08-07 12:39:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:20,804 INFO L225 Difference]: With dead ends: 37276 [2018-08-07 12:39:20,804 INFO L226 Difference]: Without dead ends: 21181 [2018-08-07 12:39:20,827 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 4200 GetRequests, 4176 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2018-08-07 12:39:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21181 states. [2018-08-07 12:39:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21181 to 20433. [2018-08-07 12:39:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20433 states. [2018-08-07 12:39:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20433 states to 20433 states and 21935 transitions. [2018-08-07 12:39:21,070 INFO L78 Accepts]: Start accepts. Automaton has 20433 states and 21935 transitions. Word has length 1044 [2018-08-07 12:39:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:21,071 INFO L480 AbstractCegarLoop]: Abstraction has 20433 states and 21935 transitions. [2018-08-07 12:39:21,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-08-07 12:39:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 20433 states and 21935 transitions. [2018-08-07 12:39:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1426 [2018-08-07 12:39:21,097 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:21,097 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 8, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-08-07 12:39:21,098 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -475359839, now seen corresponding path program 1 times [2018-08-07 12:39:21,098 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:21,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:21,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:21,099 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:21,913 WARN L170 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-08-07 12:39:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 1261 proven. 3591 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2018-08-07 12:39:26,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:26,412 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:39:26,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:26,420 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:26,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 3304 proven. 2 refuted. 0 times theorem prover too weak. 3048 trivial. 0 not checked. [2018-08-07 12:39:27,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 1496 proven. 224 refuted. 0 times theorem prover too weak. 4634 trivial. 0 not checked. [2018-08-07 12:39:29,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:39:29,938 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 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 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:39:29,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:29,966 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:39:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:39:30,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:39:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 4452 proven. 24 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2018-08-07 12:39:33,721 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:39:33,915 WARN L170 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-08-07 12:39:34,213 WARN L170 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-08-07 12:39:34,364 WARN L170 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-08-07 12:39:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 732 proven. 3885 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2018-08-07 12:39:40,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:39:40,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5, 13, 14] total 44 [2018-08-07 12:39:40,127 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:39:40,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-08-07 12:39:40,128 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-08-07 12:39:40,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2018-08-07 12:39:40,129 INFO L87 Difference]: Start difference. First operand 20433 states and 21935 transitions. Second operand 21 states. [2018-08-07 12:39:41,090 WARN L170 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2018-08-07 12:39:41,317 WARN L170 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2018-08-07 12:39:47,445 WARN L170 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-08-07 12:39:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:39:57,526 INFO L93 Difference]: Finished difference Result 38904 states and 41958 transitions. [2018-08-07 12:39:57,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-08-07 12:39:57,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1425 [2018-08-07 12:39:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:39:57,557 INFO L225 Difference]: With dead ends: 38904 [2018-08-07 12:39:57,558 INFO L226 Difference]: Without dead ends: 18336 [2018-08-07 12:39:57,596 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 5864 GetRequests, 5734 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5097 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1817, Invalid=13933, Unknown=0, NotChecked=0, Total=15750 [2018-08-07 12:39:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18336 states. [2018-08-07 12:39:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18336 to 16911. [2018-08-07 12:39:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16911 states. [2018-08-07 12:39:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16911 states to 16911 states and 17878 transitions. [2018-08-07 12:39:57,824 INFO L78 Accepts]: Start accepts. Automaton has 16911 states and 17878 transitions. Word has length 1425 [2018-08-07 12:39:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:39:57,825 INFO L480 AbstractCegarLoop]: Abstraction has 16911 states and 17878 transitions. [2018-08-07 12:39:57,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-08-07 12:39:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 16911 states and 17878 transitions. [2018-08-07 12:39:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2018-08-07 12:39:57,961 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:39:57,962 INFO L376 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:39:57,964 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:39:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 693513240, now seen corresponding path program 1 times [2018-08-07 12:39:57,965 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:39:57,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:57,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:39:57,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:39:57,966 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:39:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 1756 proven. 4509 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2018-08-07 12:40:02,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:02,382 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:02,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:02,473 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:02,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 2993 proven. 2 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-08-07 12:40:04,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:04,335 WARN L170 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-08-07 12:40:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 1828 proven. 129 refuted. 0 times theorem prover too weak. 5873 trivial. 0 not checked. [2018-08-07 12:40:06,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:06,379 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 28 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 28 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-08-07 12:40:06,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:06,396 INFO L292 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:07,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 2975 proven. 20 refuted. 0 times theorem prover too weak. 4835 trivial. 0 not checked. [2018-08-07 12:40:09,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-08-07 12:40:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7830 backedges. 739 proven. 2303 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2018-08-07 12:40:13,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-08-07 12:40:13,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5, 8, 8] total 35 [2018-08-07 12:40:13,767 INFO L255 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-08-07 12:40:13,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-08-07 12:40:13,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-08-07 12:40:13,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2018-08-07 12:40:13,770 INFO L87 Difference]: Start difference. First operand 16911 states and 17878 transitions. Second operand 24 states. [2018-08-07 12:40:18,543 WARN L170 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-08-07 12:40:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-08-07 12:40:34,005 INFO L93 Difference]: Finished difference Result 34429 states and 37259 transitions. [2018-08-07 12:40:34,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-08-07 12:40:34,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 1618 [2018-08-07 12:40:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-08-07 12:40:34,055 INFO L225 Difference]: With dead ends: 34429 [2018-08-07 12:40:34,055 INFO L226 Difference]: Without dead ends: 17894 [2018-08-07 12:40:34,089 INFO L603 BasicCegarLoop]: 0 DeclaredPredicates, 6634 GetRequests, 6509 SyntacticMatches, 13 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2361, Invalid=10521, Unknown=0, NotChecked=0, Total=12882 [2018-08-07 12:40:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17894 states. [2018-08-07 12:40:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17894 to 16881. [2018-08-07 12:40:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16881 states. [2018-08-07 12:40:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16881 states to 16881 states and 17750 transitions. [2018-08-07 12:40:34,370 INFO L78 Accepts]: Start accepts. Automaton has 16881 states and 17750 transitions. Word has length 1618 [2018-08-07 12:40:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-08-07 12:40:34,371 INFO L480 AbstractCegarLoop]: Abstraction has 16881 states and 17750 transitions. [2018-08-07 12:40:34,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-08-07 12:40:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 16881 states and 17750 transitions. [2018-08-07 12:40:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1780 [2018-08-07 12:40:34,406 INFO L368 BasicCegarLoop]: Found error trace [2018-08-07 12:40:34,407 INFO L376 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-08-07 12:40:34,407 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-08-07 12:40:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -592413071, now seen corresponding path program 1 times [2018-08-07 12:40:34,408 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-08-07 12:40:34,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:34,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:34,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-08-07 12:40:34,409 INFO L292 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-08-07 12:40:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:35,258 WARN L170 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 17 Received shutdown request... [2018-08-07 12:40:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 2133 proven. 381 refuted. 0 times theorem prover too weak. 6798 trivial. 0 not checked. [2018-08-07 12:40:37,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-08-07 12:40:37,175 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:37,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-08-07 12:40:37,183 INFO L292 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-08-07 12:40:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-08-07 12:40:37,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-08-07 12:40:37,724 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-08-07 12:40:37,926 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-08-07 12:40:37,926 WARN L549 AbstractCegarLoop]: Verification canceled [2018-08-07 12:40:37,931 WARN L202 ceAbstractionStarter]: Timeout [2018-08-07 12:40:37,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.08 12:40:37 BoogieIcfgContainer [2018-08-07 12:40:37,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-08-07 12:40:37,932 INFO L168 Benchmark]: Toolchain (without parser) took 232221.70 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,933 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-08-07 12:40:37,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 910.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 139.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,935 INFO L168 Benchmark]: Boogie Preprocessor took 254.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -903.2 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,936 INFO L168 Benchmark]: RCFGBuilder took 3920.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 133.0 MB). Peak memory consumption was 133.0 MB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,936 INFO L168 Benchmark]: TraceAbstraction took 226991.44 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -402.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-08-07 12:40:37,941 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 910.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 139.00 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 254.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -903.2 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3920.67 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 133.0 MB). Peak memory consumption was 133.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 226991.44 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -402.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 157]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 157). Cancelled while BasicCegarLoop was analyzing trace of length 1780 with TraceHistMax 14, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 226.9s OverallTime, 21 OverallIterations, 14 TraceHistogramMax, 121.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2223 SDtfs, 54302 SDslu, 4612 SDs, 0 SdLazy, 67409 SolverSat, 9110 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 80.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43359 GetRequests, 42567 SyntacticMatches, 104 SemanticMatches, 688 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14788 ImplicationChecksByTransitivity, 44.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20433occurred in iteration=18, 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: 4.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 9328 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 10.3s SatisfiabilityAnalysisTime, 70.9s InterpolantComputationTime, 32920 NumberOfCodeBlocks, 32920 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 54078 ConstructedInterpolants, 12 QuantifiedInterpolants, 235735457 SizeOfPredicates, 89 NumberOfNonLiveVariables, 30209 ConjunctsInSsa, 503 ConjunctsInUnsatCore, 74 InterpolantComputations, 9 PerfectInterpolantSequences, 132005/156258 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label03_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-08-07_12-40-37-956.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label03_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-08-07_12-40-37-956.csv Completed graceful shutdown