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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:30:18,992 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:30:18,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:30:19,011 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:30:19,011 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:30:19,012 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:30:19,014 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:30:19,016 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:30:19,019 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:30:19,025 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:30:19,026 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:30:19,029 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:30:19,030 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:30:19,033 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:30:19,036 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:30:19,037 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:30:19,038 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:30:19,042 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:30:19,046 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:30:19,049 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:30:19,051 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:30:19,052 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:30:19,054 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:30:19,054 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:30:19,054 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:30:19,057 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:30:19,058 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:30:19,058 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:30:19,059 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:30:19,061 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:30:19,062 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:30:19,062 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:30:19,063 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:30:19,063 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:30:19,064 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:30:19,065 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:30:19,065 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:30:19,084 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:30:19,084 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:30:19,085 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:30:19,086 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:30:19,086 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:30:19,086 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:30:19,086 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:30:19,086 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:30:19,087 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:30:19,087 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:30:19,087 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:30:19,087 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:30:19,087 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:30:19,088 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:30:19,088 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:30:19,089 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:30:19,089 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:30:19,089 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:30:19,089 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:30:19,089 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:30:19,090 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:30:19,090 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:30:19,090 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:30:19,090 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:30:19,090 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:30:19,091 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:30:19,091 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:30:19,091 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:30:19,091 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:30:19,091 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:30:19,092 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:30:19,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:30:19,092 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:30:19,092 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:30:19,092 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:30:19,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:30:19,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:30:19,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:30:19,168 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:30:19,168 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:30:19,169 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c [2018-11-12 16:30:19,224 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e09239f3/bd67f98465a84bd18111716ae6159b70/FLAG3c5b47460 [2018-11-12 16:30:19,792 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:30:19,794 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label40_false-unreach-call_false-termination.c [2018-11-12 16:30:19,812 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e09239f3/bd67f98465a84bd18111716ae6159b70/FLAG3c5b47460 [2018-11-12 16:30:19,833 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e09239f3/bd67f98465a84bd18111716ae6159b70 [2018-11-12 16:30:19,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:30:19,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:30:19,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:19,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:30:19,855 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:30:19,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:19" (1/1) ... [2018-11-12 16:30:19,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c7a8dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:19, skipping insertion in model container [2018-11-12 16:30:19,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:30:19" (1/1) ... [2018-11-12 16:30:19,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:30:19,948 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:30:20,497 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:20,502 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:30:20,724 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:30:20,746 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:30:20,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20 WrapperNode [2018-11-12 16:30:20,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:30:20,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:20,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:30:20,748 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:30:20,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:30:20,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:30:20,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:30:20,907 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:30:20,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:20,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:21,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (1/1) ... [2018-11-12 16:30:21,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:30:21,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:30:21,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:30:21,018 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:30:21,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (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 [2018-11-12 16:30:21,091 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:30:21,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:30:21,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:30:21,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:30:21,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:30:21,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:30:21,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:30:21,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:30:21,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:30:24,639 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:30:24,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:24 BoogieIcfgContainer [2018-11-12 16:30:24,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:30:24,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:30:24,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:30:24,645 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:30:24,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:30:19" (1/3) ... [2018-11-12 16:30:24,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f472c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:24, skipping insertion in model container [2018-11-12 16:30:24,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:30:20" (2/3) ... [2018-11-12 16:30:24,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f472c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:30:24, skipping insertion in model container [2018-11-12 16:30:24,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:30:24" (3/3) ... [2018-11-12 16:30:24,649 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label40_false-unreach-call_false-termination.c [2018-11-12 16:30:24,658 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:30:24,666 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:30:24,684 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:30:24,724 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:30:24,724 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:30:24,724 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:30:24,725 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:30:24,725 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:30:24,725 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:30:24,725 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:30:24,725 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:30:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:30:24,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-12 16:30:24,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:24,770 INFO L375 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] [2018-11-12 16:30:24,772 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:24,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -35569548, now seen corresponding path program 1 times [2018-11-12 16:30:24,782 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:24,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:24,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:24,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:24,828 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:25,209 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-11-12 16:30:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:25,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:25,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:30:25,420 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:25,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:30:25,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:30:25,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:25,449 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 16:30:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:28,545 INFO L93 Difference]: Finished difference Result 878 states and 1595 transitions. [2018-11-12 16:30:28,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:30:28,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2018-11-12 16:30:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:28,572 INFO L225 Difference]: With dead ends: 878 [2018-11-12 16:30:28,572 INFO L226 Difference]: Without dead ends: 617 [2018-11-12 16:30:28,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:30:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2018-11-12 16:30:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2018-11-12 16:30:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-11-12 16:30:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1129 transitions. [2018-11-12 16:30:28,692 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1129 transitions. Word has length 26 [2018-11-12 16:30:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:28,692 INFO L480 AbstractCegarLoop]: Abstraction has 617 states and 1129 transitions. [2018-11-12 16:30:28,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:30:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1129 transitions. [2018-11-12 16:30:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-12 16:30:28,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:28,705 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:28,706 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:28,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:28,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1735670092, now seen corresponding path program 1 times [2018-11-12 16:30:28,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:28,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:28,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:28,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:28,708 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:30:29,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:30:29,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:30:29,135 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:29,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:30:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:30:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:30:29,139 INFO L87 Difference]: Start difference. First operand 617 states and 1129 transitions. Second operand 6 states. [2018-11-12 16:30:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:31,843 INFO L93 Difference]: Finished difference Result 1620 states and 3026 transitions. [2018-11-12 16:30:31,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:30:31,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-11-12 16:30:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:31,853 INFO L225 Difference]: With dead ends: 1620 [2018-11-12 16:30:31,853 INFO L226 Difference]: Without dead ends: 1009 [2018-11-12 16:30:31,857 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:30:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2018-11-12 16:30:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 997. [2018-11-12 16:30:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2018-11-12 16:30:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1718 transitions. [2018-11-12 16:30:31,919 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1718 transitions. Word has length 146 [2018-11-12 16:30:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:31,920 INFO L480 AbstractCegarLoop]: Abstraction has 997 states and 1718 transitions. [2018-11-12 16:30:31,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:30:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1718 transitions. [2018-11-12 16:30:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-11-12 16:30:31,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:31,935 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:31,935 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:31,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:31,936 INFO L82 PathProgramCache]: Analyzing trace with hash -70137397, now seen corresponding path program 1 times [2018-11-12 16:30:31,936 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:31,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:31,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:31,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:31,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:32,551 WARN L179 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-12 16:30:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 38 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:32,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:32,871 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:32,872 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2018-11-12 16:30:32,874 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:32,930 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:32,931 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:33,593 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:33,629 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:33,631 INFO L272 AbstractInterpreter]: Visited 125 different actions 125 times. Never merged. Never widened. Performed 1107 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1107 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:30:33,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:33,660 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:34,338 INFO L227 lantSequenceWeakener]: Weakened 250 states. On average, predicates are now at 77.41% of their original sizes. [2018-11-12 16:30:34,338 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:34,523 INFO L415 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2018-11-12 16:30:34,523 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:34,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:34,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 16:30:34,525 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:34,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:30:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:30:34,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:30:34,526 INFO L87 Difference]: Start difference. First operand 997 states and 1718 transitions. Second operand 7 states. [2018-11-12 16:30:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:51,989 INFO L93 Difference]: Finished difference Result 2173 states and 3739 transitions. [2018-11-12 16:30:51,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:30:51,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2018-11-12 16:30:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:51,997 INFO L225 Difference]: With dead ends: 2173 [2018-11-12 16:30:51,997 INFO L226 Difference]: Without dead ends: 1182 [2018-11-12 16:30:52,002 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:30:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-11-12 16:30:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1180. [2018-11-12 16:30:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-11-12 16:30:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1908 transitions. [2018-11-12 16:30:52,037 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1908 transitions. Word has length 259 [2018-11-12 16:30:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:52,038 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 1908 transitions. [2018-11-12 16:30:52,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:30:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1908 transitions. [2018-11-12 16:30:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-11-12 16:30:52,047 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:52,047 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2018-11-12 16:30:52,047 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:52,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:52,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1485361180, now seen corresponding path program 1 times [2018-11-12 16:30:52,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:52,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:52,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,049 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:52,622 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:52,829 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:30:53,069 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 145 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:53,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:53,620 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:53,620 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2018-11-12 16:30:53,621 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:53,627 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:53,627 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:53,879 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:54,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:30:54,123 INFO L272 AbstractInterpreter]: Visited 130 different actions 255 times. Merged at 5 different actions 7 times. Never widened. Performed 3586 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3586 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:30:54,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:54,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:30:54,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:54,169 INFO L192 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 [2018-11-12 16:30:54,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:54,190 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:54,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:54,791 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:55,187 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 267 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-12 16:30:55,734 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:55,921 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 16:30:56,051 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 16:30:56,389 WARN L179 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-12 16:30:56,651 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-12 16:30:57,287 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-12 16:30:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 67 proven. 268 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:57,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:57,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2018-11-12 16:30:57,964 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:57,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 16:30:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 16:30:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:30:57,967 INFO L87 Difference]: Start difference. First operand 1180 states and 1908 transitions. Second operand 15 states. [2018-11-12 16:31:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:03,603 INFO L93 Difference]: Finished difference Result 2996 states and 5021 transitions. [2018-11-12 16:31:03,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 16:31:03,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 344 [2018-11-12 16:31:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:03,625 INFO L225 Difference]: With dead ends: 2996 [2018-11-12 16:31:03,625 INFO L226 Difference]: Without dead ends: 1806 [2018-11-12 16:31:03,634 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 694 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2018-11-12 16:31:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2018-11-12 16:31:03,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1577. [2018-11-12 16:31:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1577 states. [2018-11-12 16:31:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2254 transitions. [2018-11-12 16:31:03,694 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2254 transitions. Word has length 344 [2018-11-12 16:31:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:03,695 INFO L480 AbstractCegarLoop]: Abstraction has 1577 states and 2254 transitions. [2018-11-12 16:31:03,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 16:31:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2254 transitions. [2018-11-12 16:31:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-12 16:31:03,706 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:03,707 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:03,707 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:03,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1777454544, now seen corresponding path program 1 times [2018-11-12 16:31:03,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:03,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:03,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:03,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:03,709 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:04,442 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:31:04,667 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:31:05,055 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 16:31:05,410 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 16:31:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 70 proven. 317 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:31:06,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:06,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:06,148 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 371 with the following transitions: [2018-11-12 16:31:06,149 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:06,153 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:06,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:06,249 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:06,406 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:06,406 INFO L272 AbstractInterpreter]: Visited 129 different actions 252 times. Merged at 5 different actions 5 times. Never widened. Performed 2361 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2361 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:31:06,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:06,443 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:07,115 INFO L227 lantSequenceWeakener]: Weakened 35 states. On average, predicates are now at 79.4% of their original sizes. [2018-11-12 16:31:07,115 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:08,458 INFO L415 sIntCurrentIteration]: We unified 369 AI predicates to 369 [2018-11-12 16:31:08,458 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:08,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:08,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 16:31:08,459 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:08,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 16:31:08,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 16:31:08,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:31:08,462 INFO L87 Difference]: Start difference. First operand 1577 states and 2254 transitions. Second operand 21 states. [2018-11-12 16:31:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:30,120 INFO L93 Difference]: Finished difference Result 3144 states and 4530 transitions. [2018-11-12 16:31:30,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:31:30,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 370 [2018-11-12 16:31:30,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:30,129 INFO L225 Difference]: With dead ends: 3144 [2018-11-12 16:31:30,129 INFO L226 Difference]: Without dead ends: 1756 [2018-11-12 16:31:30,136 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 387 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-12 16:31:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2018-11-12 16:31:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1749. [2018-11-12 16:31:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1749 states. [2018-11-12 16:31:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 2404 transitions. [2018-11-12 16:31:30,185 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 2404 transitions. Word has length 370 [2018-11-12 16:31:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:30,185 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 2404 transitions. [2018-11-12 16:31:30,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 16:31:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 2404 transitions. [2018-11-12 16:31:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2018-11-12 16:31:30,198 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:30,199 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:30,199 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:30,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1912658812, now seen corresponding path program 1 times [2018-11-12 16:31:30,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:30,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:30,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:30,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:30,201 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 308 proven. 112 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 16:31:30,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:30,844 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:30,844 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 481 with the following transitions: [2018-11-12 16:31:30,845 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:30,848 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:30,848 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:30,911 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:31,156 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:31,156 INFO L272 AbstractInterpreter]: Visited 130 different actions 389 times. Merged at 7 different actions 21 times. Never widened. Performed 4008 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4008 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:31:31,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:31,160 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:31,677 INFO L227 lantSequenceWeakener]: Weakened 477 states. On average, predicates are now at 80.12% of their original sizes. [2018-11-12 16:31:31,677 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:31,783 INFO L415 sIntCurrentIteration]: We unified 479 AI predicates to 479 [2018-11-12 16:31:31,783 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:31,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:31,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:31:31,784 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:31,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:31:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:31:31,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:31:31,785 INFO L87 Difference]: Start difference. First operand 1749 states and 2404 transitions. Second operand 10 states. [2018-11-12 16:31:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:36,496 INFO L93 Difference]: Finished difference Result 3330 states and 4870 transitions. [2018-11-12 16:31:36,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:31:36,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 480 [2018-11-12 16:31:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:36,507 INFO L225 Difference]: With dead ends: 3330 [2018-11-12 16:31:36,507 INFO L226 Difference]: Without dead ends: 2142 [2018-11-12 16:31:36,514 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 487 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:31:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2018-11-12 16:31:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1932. [2018-11-12 16:31:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2018-11-12 16:31:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2625 transitions. [2018-11-12 16:31:36,573 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2625 transitions. Word has length 480 [2018-11-12 16:31:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:36,574 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 2625 transitions. [2018-11-12 16:31:36,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:31:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2625 transitions. [2018-11-12 16:31:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2018-11-12 16:31:36,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:36,591 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:36,591 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:36,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -38351765, now seen corresponding path program 1 times [2018-11-12 16:31:36,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:36,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:36,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:36,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:36,593 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 310 proven. 329 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-12 16:31:37,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:37,663 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:37,663 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 548 with the following transitions: [2018-11-12 16:31:37,663 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:37,667 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:37,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:38,332 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:39,343 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:31:39,343 INFO L272 AbstractInterpreter]: Visited 191 different actions 1143 times. Merged at 9 different actions 56 times. Widened at 1 different actions 1 times. Performed 13911 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13911 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:31:39,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:39,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:31:39,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:39,349 INFO L192 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 [2018-11-12 16:31:39,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:39,368 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:31:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:39,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:31:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 619 proven. 2 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-11-12 16:31:39,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:31:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 308 proven. 119 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 16:31:40,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:31:40,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 16:31:40,489 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:31:40,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:31:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:31:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:31:40,491 INFO L87 Difference]: Start difference. First operand 1932 states and 2625 transitions. Second operand 17 states. [2018-11-12 16:31:45,096 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-12 16:31:45,375 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2018-11-12 16:31:45,596 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-11-12 16:31:46,148 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 16:31:50,433 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-11-12 16:31:50,991 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-11-12 16:31:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:52,467 INFO L93 Difference]: Finished difference Result 5097 states and 7691 transitions. [2018-11-12 16:31:52,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-12 16:31:52,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 547 [2018-11-12 16:31:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:52,490 INFO L225 Difference]: With dead ends: 5097 [2018-11-12 16:31:52,490 INFO L226 Difference]: Without dead ends: 3726 [2018-11-12 16:31:52,505 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 1127 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 16:31:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2018-11-12 16:31:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 3596. [2018-11-12 16:31:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3596 states. [2018-11-12 16:31:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 4655 transitions. [2018-11-12 16:31:52,625 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 4655 transitions. Word has length 547 [2018-11-12 16:31:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:52,628 INFO L480 AbstractCegarLoop]: Abstraction has 3596 states and 4655 transitions. [2018-11-12 16:31:52,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:31:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 4655 transitions. [2018-11-12 16:31:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-11-12 16:31:52,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:52,642 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2018-11-12 16:31:52,642 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:52,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:52,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1213894901, now seen corresponding path program 1 times [2018-11-12 16:31:52,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:52,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:52,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:52,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:52,644 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 426 proven. 482 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2018-11-12 16:31:54,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:54,257 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:54,257 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-11-12 16:31:54,257 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:54,260 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:54,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:54,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:54,851 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:31:54,851 INFO L272 AbstractInterpreter]: Visited 132 different actions 655 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 8511 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8511 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:31:54,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:54,857 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:31:54,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:54,857 INFO L192 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 [2018-11-12 16:31:54,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:54,866 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:31:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:55,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:31:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 804 proven. 2 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-11-12 16:31:55,455 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:31:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 420 proven. 112 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2018-11-12 16:31:56,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:31:56,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 14 [2018-11-12 16:31:56,176 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:31:56,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 16:31:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 16:31:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:31:56,177 INFO L87 Difference]: Start difference. First operand 3596 states and 4655 transitions. Second operand 13 states. [2018-11-12 16:32:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:00,152 INFO L93 Difference]: Finished difference Result 7123 states and 9679 transitions. [2018-11-12 16:32:00,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-12 16:32:00,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 565 [2018-11-12 16:32:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:00,172 INFO L225 Difference]: With dead ends: 7123 [2018-11-12 16:32:00,172 INFO L226 Difference]: Without dead ends: 3891 [2018-11-12 16:32:00,187 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1161 GetRequests, 1136 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:32:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2018-11-12 16:32:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3783. [2018-11-12 16:32:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2018-11-12 16:32:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 4792 transitions. [2018-11-12 16:32:00,289 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 4792 transitions. Word has length 565 [2018-11-12 16:32:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:00,290 INFO L480 AbstractCegarLoop]: Abstraction has 3783 states and 4792 transitions. [2018-11-12 16:32:00,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 16:32:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 4792 transitions. [2018-11-12 16:32:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2018-11-12 16:32:00,305 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:00,305 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:00,305 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:00,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1617344107, now seen corresponding path program 1 times [2018-11-12 16:32:00,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:00,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:00,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:00,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:00,307 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:00,839 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 16:32:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 452 proven. 545 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-12 16:32:01,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:01,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:01,737 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 614 with the following transitions: [2018-11-12 16:32:01,737 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [746], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:01,739 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:01,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:01,819 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:02,450 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:02,451 INFO L272 AbstractInterpreter]: Visited 145 different actions 579 times. Merged at 8 different actions 35 times. Widened at 1 different actions 1 times. Performed 6313 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6313 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:02,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:02,457 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:02,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:02,457 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:02,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:02,469 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:02,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 867 proven. 2 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-12 16:32:03,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 448 proven. 112 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-12 16:32:04,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:04,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:32:04,049 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:04,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:32:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:32:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:32:04,051 INFO L87 Difference]: Start difference. First operand 3783 states and 4792 transitions. Second operand 17 states. [2018-11-12 16:32:05,444 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2018-11-12 16:32:11,553 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-11-12 16:32:11,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:11,978 INFO L93 Difference]: Finished difference Result 8162 states and 11222 transitions. [2018-11-12 16:32:11,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-12 16:32:11,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 613 [2018-11-12 16:32:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:11,998 INFO L225 Difference]: With dead ends: 8162 [2018-11-12 16:32:11,998 INFO L226 Difference]: Without dead ends: 4318 [2018-11-12 16:32:12,031 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1304 GetRequests, 1243 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=793, Invalid=2989, Unknown=0, NotChecked=0, Total=3782 [2018-11-12 16:32:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2018-11-12 16:32:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 4183. [2018-11-12 16:32:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4183 states. [2018-11-12 16:32:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 4854 transitions. [2018-11-12 16:32:12,130 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 4854 transitions. Word has length 613 [2018-11-12 16:32:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:12,131 INFO L480 AbstractCegarLoop]: Abstraction has 4183 states and 4854 transitions. [2018-11-12 16:32:12,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:32:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 4854 transitions. [2018-11-12 16:32:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-11-12 16:32:12,143 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:12,144 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:12,144 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:12,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1431796904, now seen corresponding path program 2 times [2018-11-12 16:32:12,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:12,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:12,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:12,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:12,146 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 446 proven. 119 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-12 16:32:12,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:12,985 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:12,985 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 16:32:12,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:32:12,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:12,985 INFO L192 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 [2018-11-12 16:32:12,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 16:32:12,996 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 16:32:13,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-12 16:32:13,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 16:32:13,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 554 proven. 2 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-12 16:32:13,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 554 proven. 2 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-12 16:32:13,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:13,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 16:32:13,961 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:13,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:32:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:32:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:32:13,962 INFO L87 Difference]: Start difference. First operand 4183 states and 4854 transitions. Second operand 9 states. [2018-11-12 16:32:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:20,014 INFO L93 Difference]: Finished difference Result 13963 states and 18600 transitions. [2018-11-12 16:32:20,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-12 16:32:20,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 658 [2018-11-12 16:32:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:20,075 INFO L225 Difference]: With dead ends: 13963 [2018-11-12 16:32:20,075 INFO L226 Difference]: Without dead ends: 10341 [2018-11-12 16:32:20,111 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 1342 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1691, Unknown=0, NotChecked=0, Total=2070 [2018-11-12 16:32:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2018-11-12 16:32:20,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9977. [2018-11-12 16:32:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9977 states. [2018-11-12 16:32:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9977 states to 9977 states and 11494 transitions. [2018-11-12 16:32:20,398 INFO L78 Accepts]: Start accepts. Automaton has 9977 states and 11494 transitions. Word has length 658 [2018-11-12 16:32:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:20,399 INFO L480 AbstractCegarLoop]: Abstraction has 9977 states and 11494 transitions. [2018-11-12 16:32:20,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:32:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 9977 states and 11494 transitions. [2018-11-12 16:32:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2018-11-12 16:32:20,428 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:20,429 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:20,429 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:20,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1245261793, now seen corresponding path program 1 times [2018-11-12 16:32:20,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:20,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:20,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 16:32:20,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:20,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 487 proven. 196 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-11-12 16:32:21,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:21,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:21,174 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 746 with the following transitions: [2018-11-12 16:32:21,174 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:21,177 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:21,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:21,417 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:22,216 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:22,217 INFO L272 AbstractInterpreter]: Visited 193 different actions 972 times. Merged at 11 different actions 55 times. Widened at 1 different actions 1 times. Performed 13353 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13353 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 15 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:32:22,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:22,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:22,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:22,224 INFO L192 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 [2018-11-12 16:32:22,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:22,235 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:22,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 1196 proven. 2 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-11-12 16:32:22,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 487 proven. 196 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2018-11-12 16:32:23,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:23,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:32:23,448 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:23,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:32:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:32:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:32:23,450 INFO L87 Difference]: Start difference. First operand 9977 states and 11494 transitions. Second operand 7 states. [2018-11-12 16:32:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:25,955 INFO L93 Difference]: Finished difference Result 24029 states and 31231 transitions. [2018-11-12 16:32:25,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:32:25,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 745 [2018-11-12 16:32:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:26,066 INFO L225 Difference]: With dead ends: 24029 [2018-11-12 16:32:26,066 INFO L226 Difference]: Without dead ends: 14613 [2018-11-12 16:32:26,157 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1492 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:32:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14613 states. [2018-11-12 16:32:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14613 to 13869. [2018-11-12 16:32:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13869 states. [2018-11-12 16:32:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 16108 transitions. [2018-11-12 16:32:26,590 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 16108 transitions. Word has length 745 [2018-11-12 16:32:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:26,591 INFO L480 AbstractCegarLoop]: Abstraction has 13869 states and 16108 transitions. [2018-11-12 16:32:26,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:32:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 16108 transitions. [2018-11-12 16:32:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-11-12 16:32:26,631 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:26,632 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:26,632 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:26,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1002459152, now seen corresponding path program 1 times [2018-11-12 16:32:26,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:26,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:26,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:26,634 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 486 proven. 829 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-11-12 16:32:28,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:28,315 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:28,315 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 791 with the following transitions: [2018-11-12 16:32:28,316 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:28,318 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:28,318 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:28,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:29,274 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:29,274 INFO L272 AbstractInterpreter]: Visited 193 different actions 971 times. Merged at 11 different actions 54 times. Widened at 1 different actions 1 times. Performed 13656 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13656 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 15 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:32:29,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:29,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:29,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:29,283 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:32:29,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:29,292 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:29,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 1243 proven. 2 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2018-11-12 16:32:30,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:30,410 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-12 16:32:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1690 backedges. 532 proven. 196 refuted. 0 times theorem prover too weak. 962 trivial. 0 not checked. [2018-11-12 16:32:31,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:31,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:32:31,068 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:31,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:32:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:32:31,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:32:31,071 INFO L87 Difference]: Start difference. First operand 13869 states and 16108 transitions. Second operand 17 states. [2018-11-12 16:32:34,633 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-11-12 16:32:35,799 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:32:36,742 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:32:37,318 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 16:32:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:37,925 INFO L93 Difference]: Finished difference Result 29135 states and 34767 transitions. [2018-11-12 16:32:37,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 16:32:37,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 790 [2018-11-12 16:32:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:37,997 INFO L225 Difference]: With dead ends: 29135 [2018-11-12 16:32:37,997 INFO L226 Difference]: Without dead ends: 15459 [2018-11-12 16:32:38,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1602 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-12 16:32:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15459 states. [2018-11-12 16:32:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15459 to 15204. [2018-11-12 16:32:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15204 states. [2018-11-12 16:32:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15204 states to 15204 states and 17549 transitions. [2018-11-12 16:32:38,449 INFO L78 Accepts]: Start accepts. Automaton has 15204 states and 17549 transitions. Word has length 790 [2018-11-12 16:32:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:38,450 INFO L480 AbstractCegarLoop]: Abstraction has 15204 states and 17549 transitions. [2018-11-12 16:32:38,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:32:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 15204 states and 17549 transitions. [2018-11-12 16:32:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2018-11-12 16:32:38,631 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:38,632 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:38,632 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:38,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:38,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1212561807, now seen corresponding path program 1 times [2018-11-12 16:32:38,634 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:38,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:38,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:38,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:38,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 784 proven. 1467 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-11-12 16:32:42,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:42,249 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:42,250 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 906 with the following transitions: [2018-11-12 16:32:42,250 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:42,253 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:42,253 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:42,433 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:43,242 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:43,242 INFO L272 AbstractInterpreter]: Visited 194 different actions 1174 times. Merged at 12 different actions 70 times. Widened at 1 different actions 2 times. Performed 13680 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13680 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 22 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:32:43,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:43,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:43,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:43,247 INFO L192 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 [2018-11-12 16:32:43,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:43,256 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:43,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 1578 proven. 2 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2018-11-12 16:32:43,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 679 proven. 196 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2018-11-12 16:32:44,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:44,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 34 [2018-11-12 16:32:44,578 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:44,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-12 16:32:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-12 16:32:44,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2018-11-12 16:32:44,580 INFO L87 Difference]: Start difference. First operand 15204 states and 17549 transitions. Second operand 32 states. [2018-11-12 16:32:52,189 WARN L179 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-11-12 16:32:52,460 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-12 16:32:52,856 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2018-11-12 16:32:53,876 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2018-11-12 16:32:56,181 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-11-12 16:32:58,181 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2018-11-12 16:32:58,516 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2018-11-12 16:33:00,466 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-11-12 16:33:01,892 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-11-12 16:33:02,115 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2018-11-12 16:33:02,479 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 35 [2018-11-12 16:33:05,701 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2018-11-12 16:33:07,308 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2018-11-12 16:33:12,429 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2018-11-12 16:33:14,139 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2018-11-12 16:33:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:23,745 INFO L93 Difference]: Finished difference Result 35457 states and 47792 transitions. [2018-11-12 16:33:23,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-11-12 16:33:23,746 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 905 [2018-11-12 16:33:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:23,825 INFO L225 Difference]: With dead ends: 35457 [2018-11-12 16:33:23,825 INFO L226 Difference]: Without dead ends: 20098 [2018-11-12 16:33:23,898 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2051 GetRequests, 1873 SyntacticMatches, 4 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11452 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=4194, Invalid=26606, Unknown=0, NotChecked=0, Total=30800 [2018-11-12 16:33:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2018-11-12 16:33:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 18899. [2018-11-12 16:33:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18899 states. [2018-11-12 16:33:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18899 states to 18899 states and 22434 transitions. [2018-11-12 16:33:24,554 INFO L78 Accepts]: Start accepts. Automaton has 18899 states and 22434 transitions. Word has length 905 [2018-11-12 16:33:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:24,555 INFO L480 AbstractCegarLoop]: Abstraction has 18899 states and 22434 transitions. [2018-11-12 16:33:24,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-12 16:33:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 18899 states and 22434 transitions. [2018-11-12 16:33:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2018-11-12 16:33:24,598 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:24,599 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-12 16:33:24,599 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:24,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1787559451, now seen corresponding path program 1 times [2018-11-12 16:33:24,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:24,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:24,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:24,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:24,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3274 backedges. 1388 proven. 355 refuted. 0 times theorem prover too weak. 1531 trivial. 0 not checked. [2018-11-12 16:33:25,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:25,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:25,885 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1094 with the following transitions: [2018-11-12 16:33:25,886 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [726], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:25,889 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:25,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:26,181 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:27,077 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:27,077 INFO L272 AbstractInterpreter]: Visited 195 different actions 1194 times. Merged at 13 different actions 83 times. Widened at 1 different actions 3 times. Performed 13613 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13613 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:33:27,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:27,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:27,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:27,088 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:33:27,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:27,101 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:27,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3274 backedges. 2116 proven. 6 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-11-12 16:33:28,398 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3274 backedges. 1388 proven. 359 refuted. 0 times theorem prover too weak. 1527 trivial. 0 not checked. [2018-11-12 16:33:29,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:29,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2018-11-12 16:33:29,539 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:29,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:33:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:33:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:33:29,541 INFO L87 Difference]: Start difference. First operand 18899 states and 22434 transitions. Second operand 9 states. [2018-11-12 16:33:34,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:34,288 INFO L93 Difference]: Finished difference Result 43250 states and 52451 transitions. [2018-11-12 16:33:34,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-12 16:33:34,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1093 [2018-11-12 16:33:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:34,410 INFO L225 Difference]: With dead ends: 43250 [2018-11-12 16:33:34,410 INFO L226 Difference]: Without dead ends: 24725 [2018-11-12 16:33:34,530 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2214 GetRequests, 2190 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:33:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24725 states. [2018-11-12 16:33:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24725 to 24287. [2018-11-12 16:33:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24287 states. [2018-11-12 16:33:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24287 states to 24287 states and 28946 transitions. [2018-11-12 16:33:35,331 INFO L78 Accepts]: Start accepts. Automaton has 24287 states and 28946 transitions. Word has length 1093 [2018-11-12 16:33:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:35,332 INFO L480 AbstractCegarLoop]: Abstraction has 24287 states and 28946 transitions. [2018-11-12 16:33:35,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:33:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 24287 states and 28946 transitions. [2018-11-12 16:33:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1651 [2018-11-12 16:33:35,365 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:35,366 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-11-12 16:33:35,366 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:35,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:35,366 INFO L82 PathProgramCache]: Analyzing trace with hash 245405392, now seen corresponding path program 1 times [2018-11-12 16:33:35,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:35,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:35,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:35,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:35,368 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7868 backedges. 791 proven. 3095 refuted. 0 times theorem prover too weak. 3982 trivial. 0 not checked. [2018-11-12 16:33:41,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:41,327 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:41,327 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1651 with the following transitions: [2018-11-12 16:33:41,328 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [109], [111], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [670], [671], [675], [679], [683], [687], [690], [691], [694], [695], [699], [703], [707], [711], [715], [719], [723], [726], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:41,330 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:41,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:41,626 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:42,742 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:42,742 INFO L272 AbstractInterpreter]: Visited 202 different actions 1449 times. Merged at 15 different actions 106 times. Widened at 1 different actions 3 times. Performed 17868 root evaluator evaluations with a maximum evaluation depth of 6. Performed 17868 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 51 fixpoints after 8 different actions. Largest state had 24 variables. [2018-11-12 16:33:42,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:42,750 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:42,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:42,750 INFO L192 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 [2018-11-12 16:33:42,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:42,760 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:43,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:46,272 WARN L179 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 3060 DAG size of output: 57 [2018-11-12 16:33:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7868 backedges. 4417 proven. 40 refuted. 0 times theorem prover too weak. 3411 trivial. 0 not checked. [2018-11-12 16:33:48,899 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:49,552 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2018-11-12 16:33:49,809 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2018-11-12 16:33:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7868 backedges. 736 proven. 1033 refuted. 0 times theorem prover too weak. 6099 trivial. 0 not checked. [2018-11-12 16:33:51,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:51,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 6] total 32 [2018-11-12 16:33:51,710 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:51,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-12 16:33:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-12 16:33:51,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2018-11-12 16:33:51,713 INFO L87 Difference]: Start difference. First operand 24287 states and 28946 transitions. Second operand 30 states. Received shutdown request... [2018-11-12 16:33:52,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 16:33:52,308 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:33:52,315 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:33:52,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:33:52 BoogieIcfgContainer [2018-11-12 16:33:52,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:33:52,316 INFO L168 Benchmark]: Toolchain (without parser) took 212470.55 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:52,317 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:33:52,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 899.20 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:52,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 158.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:52,319 INFO L168 Benchmark]: Boogie Preprocessor took 109.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:33:52,319 INFO L168 Benchmark]: RCFGBuilder took 3622.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 120.4 MB). Peak memory consumption was 120.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:52,320 INFO L168 Benchmark]: TraceAbstraction took 207674.46 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -375.7 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:52,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 899.20 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: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 158.66 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -814.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.97 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3622.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 120.4 MB). Peak memory consumption was 120.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207674.46 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.4 GB in the end (delta: -375.7 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 61). Cancelled while BasicCegarLoop was constructing difference of abstraction (24287states) and FLOYD_HOARE automaton (currently 5 states, 30 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 207.6s OverallTime, 15 OverallIterations, 13 TraceHistogramMax, 140.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1897 SDtfs, 47226 SDslu, 5316 SDs, 0 SdLazy, 60456 SolverSat, 11902 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.8s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 17668 GetRequests, 17065 SyntacticMatches, 23 SemanticMatches, 580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16221 ImplicationChecksByTransitivity, 37.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24287occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.5s AbstIntTime, 12 AbstIntIterations, 3 AbstIntStrong, 0.997362280738478 AbsIntWeakeningRatio, 0.0867992766726944 AbsIntAvgWeakeningVarsNumRemoved, 19.126582278481013 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 3833 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 34.7s InterpolantComputationTime, 17101 NumberOfCodeBlocks, 16769 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 24976 ConstructedInterpolants, 7 QuantifiedInterpolants, 100764006 SizeOfPredicates, 45 NumberOfNonLiveVariables, 10843 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 35 InterpolantComputations, 2 PerfectInterpolantSequences, 54797/65647 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown