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/Problem11_label55_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:42:38,898 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:42:38,900 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:42:38,913 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:42:38,913 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:42:38,914 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:42:38,916 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:42:38,917 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:42:38,919 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:42:38,920 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:42:38,921 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:42:38,921 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:42:38,922 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:42:38,923 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:42:38,924 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:42:38,925 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:42:38,926 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:42:38,927 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:42:38,930 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:42:38,931 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:42:38,932 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:42:38,934 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:42:38,936 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:42:38,936 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:42:38,937 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:42:38,938 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:42:38,939 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:42:38,939 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:42:38,940 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:42:38,941 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:42:38,942 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:42:38,942 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:42:38,942 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:42:38,943 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:42:38,944 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:42:38,944 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:42:38,945 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 18:42:38,960 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:42:38,960 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:42:38,961 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:42:38,961 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:42:38,961 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:42:38,962 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:42:38,962 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:42:38,962 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:42:38,962 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:42:38,962 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:42:38,963 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:42:38,963 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:42:38,963 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:42:38,964 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:42:38,964 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:42:38,964 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:42:38,964 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:42:38,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:42:38,965 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:42:38,965 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:42:38,965 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:42:38,965 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:42:38,965 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:42:38,966 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:42:38,966 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:42:38,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:42:38,966 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:42:38,966 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:42:38,967 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:42:38,967 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:42:38,967 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:42:38,967 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:42:38,967 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:42:38,968 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:42:38,968 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:42:39,020 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:42:39,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:42:39,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:42:39,039 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:42:39,040 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:42:39,040 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55_true-unreach-call.c [2018-11-12 18:42:39,095 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea207aa9/393b33e9290e408ba0e6fbfe5bd4693e/FLAGd612ed71a [2018-11-12 18:42:39,742 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:42:39,743 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55_true-unreach-call.c [2018-11-12 18:42:39,761 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea207aa9/393b33e9290e408ba0e6fbfe5bd4693e/FLAGd612ed71a [2018-11-12 18:42:39,782 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eea207aa9/393b33e9290e408ba0e6fbfe5bd4693e [2018-11-12 18:42:39,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:42:39,798 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:42:39,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:42:39,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:42:39,804 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:42:39,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:42:39" (1/1) ... [2018-11-12 18:42:39,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d32a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:39, skipping insertion in model container [2018-11-12 18:42:39,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:42:39" (1/1) ... [2018-11-12 18:42:39,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:42:39,917 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:42:40,529 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:42:40,534 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:42:40,711 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:42:40,731 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:42:40,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40 WrapperNode [2018-11-12 18:42:40,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:42:40,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:42:40,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:42:40,733 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:42:40,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:40,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:40,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:42:40,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:42:40,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:42:40,911 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:42:40,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:40,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:40,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:40,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:41,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:41,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:41,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (1/1) ... [2018-11-12 18:42:41,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:42:41,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:42:41,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:42:41,059 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:42:41,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (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 18:42:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:42:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:42:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:42:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:42:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:42:41,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:42:41,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:42:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:42:41,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:42:46,360 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:42:46,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:42:46 BoogieIcfgContainer [2018-11-12 18:42:46,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:42:46,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:42:46,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:42:46,365 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:42:46,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:42:39" (1/3) ... [2018-11-12 18:42:46,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629c09b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:42:46, skipping insertion in model container [2018-11-12 18:42:46,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:42:40" (2/3) ... [2018-11-12 18:42:46,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629c09b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:42:46, skipping insertion in model container [2018-11-12 18:42:46,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:42:46" (3/3) ... [2018-11-12 18:42:46,369 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label55_true-unreach-call.c [2018-11-12 18:42:46,379 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:42:46,388 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:42:46,402 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:42:46,443 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:42:46,444 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:42:46,444 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:42:46,444 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:42:46,444 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:42:46,444 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:42:46,444 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:42:46,445 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:42:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:42:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-12 18:42:46,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:46,486 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, 1, 1, 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 18:42:46,489 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:46,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:46,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2008695804, now seen corresponding path program 1 times [2018-11-12 18:42:46,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:46,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:46,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:46,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:46,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:47,061 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 18:42:47,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:42:47,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:42:47,064 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:47,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:42:47,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:42:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:47,095 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-12 18:42:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:50,600 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-11-12 18:42:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:42:50,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-11-12 18:42:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:50,625 INFO L225 Difference]: With dead ends: 979 [2018-11-12 18:42:50,626 INFO L226 Difference]: Without dead ends: 680 [2018-11-12 18:42:50,634 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:50,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-11-12 18:42:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-11-12 18:42:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-11-12 18:42:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-11-12 18:42:50,730 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 52 [2018-11-12 18:42:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:50,731 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-11-12 18:42:50,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:42:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-11-12 18:42:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-12 18:42:50,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:50,739 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:50,739 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:50,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1306963893, now seen corresponding path program 1 times [2018-11-12 18:42:50,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:50,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:50,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:50,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:50,742 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:51,082 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:42:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:51,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:42:51,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:42:51,148 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:51,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:42:51,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:42:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:42:51,151 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-11-12 18:42:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:55,312 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-11-12 18:42:55,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:42:55,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-12 18:42:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:55,326 INFO L225 Difference]: With dead ends: 1555 [2018-11-12 18:42:55,326 INFO L226 Difference]: Without dead ends: 1077 [2018-11-12 18:42:55,330 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 18:42:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-11-12 18:42:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-11-12 18:42:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-11-12 18:42:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-11-12 18:42:55,389 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 125 [2018-11-12 18:42:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:55,390 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-11-12 18:42:55,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:42:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-11-12 18:42:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-12 18:42:55,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:55,395 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:55,395 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:55,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:55,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1349379296, now seen corresponding path program 1 times [2018-11-12 18:42:55,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:55,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:55,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:55,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:55,398 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:55,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:42:55,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:42:55,644 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:42:55,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:42:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:42:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:55,646 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 4 states. [2018-11-12 18:42:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:42:58,539 INFO L93 Difference]: Finished difference Result 2907 states and 4465 transitions. [2018-11-12 18:42:58,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:42:58,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2018-11-12 18:42:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:42:58,554 INFO L225 Difference]: With dead ends: 2907 [2018-11-12 18:42:58,554 INFO L226 Difference]: Without dead ends: 1850 [2018-11-12 18:42:58,561 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:42:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2018-11-12 18:42:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1646. [2018-11-12 18:42:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2018-11-12 18:42:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2436 transitions. [2018-11-12 18:42:58,621 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2436 transitions. Word has length 126 [2018-11-12 18:42:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:42:58,622 INFO L480 AbstractCegarLoop]: Abstraction has 1646 states and 2436 transitions. [2018-11-12 18:42:58,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:42:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2436 transitions. [2018-11-12 18:42:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-12 18:42:58,637 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:42:58,638 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:42:58,638 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:42:58,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1663032705, now seen corresponding path program 1 times [2018-11-12 18:42:58,638 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:42:58,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:58,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:42:58,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:42:58,640 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:42:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:42:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:42:59,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:42:59,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:42:59,084 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 148 with the following transitions: [2018-11-12 18:42:59,086 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:42:59,142 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:42:59,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:42:59,749 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:42:59,757 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:42:59,758 INFO L272 AbstractInterpreter]: Visited 99 different actions 99 times. Never merged. Never widened. Performed 1094 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1094 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:42:59,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:42:59,805 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:00,314 INFO L227 lantSequenceWeakener]: Weakened 141 states. On average, predicates are now at 73.76% of their original sizes. [2018-11-12 18:43:00,315 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:00,674 INFO L415 sIntCurrentIteration]: We unified 146 AI predicates to 146 [2018-11-12 18:43:00,674 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:00,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:00,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 18:43:00,676 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:00,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:43:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:43:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:43:00,677 INFO L87 Difference]: Start difference. First operand 1646 states and 2436 transitions. Second operand 7 states. [2018-11-12 18:43:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:12,171 INFO L93 Difference]: Finished difference Result 3478 states and 5113 transitions. [2018-11-12 18:43:12,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:43:12,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2018-11-12 18:43:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:12,182 INFO L225 Difference]: With dead ends: 3478 [2018-11-12 18:43:12,182 INFO L226 Difference]: Without dead ends: 1838 [2018-11-12 18:43:12,190 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 147 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:43:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2018-11-12 18:43:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1836. [2018-11-12 18:43:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1836 states. [2018-11-12 18:43:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2636 transitions. [2018-11-12 18:43:12,249 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2636 transitions. Word has length 147 [2018-11-12 18:43:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:12,249 INFO L480 AbstractCegarLoop]: Abstraction has 1836 states and 2636 transitions. [2018-11-12 18:43:12,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:43:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2636 transitions. [2018-11-12 18:43:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-12 18:43:12,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:12,258 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:12,259 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:12,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 639193526, now seen corresponding path program 1 times [2018-11-12 18:43:12,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:12,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:12,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:12,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:12,261 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-11-12 18:43:12,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:12,917 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:12,917 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2018-11-12 18:43:12,917 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:12,924 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:12,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:13,028 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:13,384 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:13,385 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3017 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3017 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:43:13,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:13,423 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:14,151 INFO L227 lantSequenceWeakener]: Weakened 261 states. On average, predicates are now at 73.51% of their original sizes. [2018-11-12 18:43:14,152 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:15,094 INFO L415 sIntCurrentIteration]: We unified 263 AI predicates to 263 [2018-11-12 18:43:15,095 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:15,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:15,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-12 18:43:15,096 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:15,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:43:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:43:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:43:15,097 INFO L87 Difference]: Start difference. First operand 1836 states and 2636 transitions. Second operand 11 states. [2018-11-12 18:43:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:25,578 INFO L93 Difference]: Finished difference Result 3671 states and 5319 transitions. [2018-11-12 18:43:25,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:43:25,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 264 [2018-11-12 18:43:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:25,589 INFO L225 Difference]: With dead ends: 3671 [2018-11-12 18:43:25,590 INFO L226 Difference]: Without dead ends: 2031 [2018-11-12 18:43:25,596 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 272 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:43:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2018-11-12 18:43:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2027. [2018-11-12 18:43:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2018-11-12 18:43:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2846 transitions. [2018-11-12 18:43:25,653 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2846 transitions. Word has length 264 [2018-11-12 18:43:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:25,654 INFO L480 AbstractCegarLoop]: Abstraction has 2027 states and 2846 transitions. [2018-11-12 18:43:25,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:43:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2846 transitions. [2018-11-12 18:43:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-11-12 18:43:25,661 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:25,661 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:25,662 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:25,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:25,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1754714282, now seen corresponding path program 1 times [2018-11-12 18:43:25,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:25,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:25,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:25,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:25,664 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:26,145 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:43:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-12 18:43:26,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:26,784 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:26,784 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2018-11-12 18:43:26,785 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:26,792 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:26,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:26,917 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:27,222 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:27,223 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Performed 6458 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6458 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:43:27,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:27,228 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:27,599 INFO L227 lantSequenceWeakener]: Weakened 271 states. On average, predicates are now at 73.49% of their original sizes. [2018-11-12 18:43:27,600 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:28,049 INFO L415 sIntCurrentIteration]: We unified 273 AI predicates to 273 [2018-11-12 18:43:28,050 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:28,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:28,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2018-11-12 18:43:28,051 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:28,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:43:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:43:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:43:28,052 INFO L87 Difference]: Start difference. First operand 2027 states and 2846 transitions. Second operand 11 states. [2018-11-12 18:43:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:36,822 INFO L93 Difference]: Finished difference Result 4056 states and 5784 transitions. [2018-11-12 18:43:36,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:43:36,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 274 [2018-11-12 18:43:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:36,834 INFO L225 Difference]: With dead ends: 4056 [2018-11-12 18:43:36,834 INFO L226 Difference]: Without dead ends: 2416 [2018-11-12 18:43:36,841 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 283 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:43:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2018-11-12 18:43:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2410. [2018-11-12 18:43:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2018-11-12 18:43:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3287 transitions. [2018-11-12 18:43:36,901 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3287 transitions. Word has length 274 [2018-11-12 18:43:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:36,902 INFO L480 AbstractCegarLoop]: Abstraction has 2410 states and 3287 transitions. [2018-11-12 18:43:36,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:43:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3287 transitions. [2018-11-12 18:43:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-11-12 18:43:36,910 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:36,910 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:36,910 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:36,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -692659657, now seen corresponding path program 1 times [2018-11-12 18:43:36,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:36,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:36,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:36,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:36,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:43:37,193 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:43:37,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:43:37,193 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:37,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:43:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:43:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:43:37,195 INFO L87 Difference]: Start difference. First operand 2410 states and 3287 transitions. Second operand 4 states. [2018-11-12 18:43:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:39,068 INFO L93 Difference]: Finished difference Result 5921 states and 9141 transitions. [2018-11-12 18:43:39,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:43:39,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 276 [2018-11-12 18:43:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:39,096 INFO L225 Difference]: With dead ends: 5921 [2018-11-12 18:43:39,096 INFO L226 Difference]: Without dead ends: 4281 [2018-11-12 18:43:39,112 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:43:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2018-11-12 18:43:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4279. [2018-11-12 18:43:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2018-11-12 18:43:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6032 transitions. [2018-11-12 18:43:39,227 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6032 transitions. Word has length 276 [2018-11-12 18:43:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:39,228 INFO L480 AbstractCegarLoop]: Abstraction has 4279 states and 6032 transitions. [2018-11-12 18:43:39,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:43:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6032 transitions. [2018-11-12 18:43:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-11-12 18:43:39,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:39,240 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:39,240 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:39,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -728471676, now seen corresponding path program 1 times [2018-11-12 18:43:39,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:39,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:39,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:39,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:39,242 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:40,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:40,318 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:40,318 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 280 with the following transitions: [2018-11-12 18:43:40,319 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:40,325 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:40,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:40,437 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:41,361 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:41,361 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Performed 7691 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7691 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:43:41,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:41,367 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:41,741 INFO L227 lantSequenceWeakener]: Weakened 276 states. On average, predicates are now at 73.53% of their original sizes. [2018-11-12 18:43:41,741 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:41,904 INFO L415 sIntCurrentIteration]: We unified 278 AI predicates to 278 [2018-11-12 18:43:41,904 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:41,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:41,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2018-11-12 18:43:41,905 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:41,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:43:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:43:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:43:41,906 INFO L87 Difference]: Start difference. First operand 4279 states and 6032 transitions. Second operand 13 states. [2018-11-12 18:44:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:02,411 INFO L93 Difference]: Finished difference Result 8375 states and 12068 transitions. [2018-11-12 18:44:02,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:44:02,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 279 [2018-11-12 18:44:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:02,432 INFO L225 Difference]: With dead ends: 8375 [2018-11-12 18:44:02,432 INFO L226 Difference]: Without dead ends: 4676 [2018-11-12 18:44:02,449 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 288 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:44:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2018-11-12 18:44:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4670. [2018-11-12 18:44:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4670 states. [2018-11-12 18:44:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 6454 transitions. [2018-11-12 18:44:02,554 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 6454 transitions. Word has length 279 [2018-11-12 18:44:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:02,555 INFO L480 AbstractCegarLoop]: Abstraction has 4670 states and 6454 transitions. [2018-11-12 18:44:02,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:44:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 6454 transitions. [2018-11-12 18:44:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-11-12 18:44:02,567 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:02,568 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:44:02,568 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:02,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:02,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1558513575, now seen corresponding path program 1 times [2018-11-12 18:44:02,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:02,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:02,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:02,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:02,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:02,942 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:44:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 2 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:03,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:03,835 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:03,835 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2018-11-12 18:44:03,835 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:03,840 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:03,840 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:03,900 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:04,411 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:44:04,411 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Performed 8714 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8714 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:44:04,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:04,417 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:44:04,895 INFO L227 lantSequenceWeakener]: Weakened 81 states. On average, predicates are now at 75.09% of their original sizes. [2018-11-12 18:44:04,895 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:44:05,302 INFO L415 sIntCurrentIteration]: We unified 294 AI predicates to 294 [2018-11-12 18:44:05,303 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:44:05,303 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:44:05,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 18:44:05,304 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:05,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 18:44:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 18:44:05,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:44:05,306 INFO L87 Difference]: Start difference. First operand 4670 states and 6454 transitions. Second operand 21 states. [2018-11-12 18:44:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:33,704 INFO L93 Difference]: Finished difference Result 9540 states and 13270 transitions. [2018-11-12 18:44:33,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-12 18:44:33,704 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 295 [2018-11-12 18:44:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:33,728 INFO L225 Difference]: With dead ends: 9540 [2018-11-12 18:44:33,728 INFO L226 Difference]: Without dead ends: 5647 [2018-11-12 18:44:33,744 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 313 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 18:44:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5647 states. [2018-11-12 18:44:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5647 to 5636. [2018-11-12 18:44:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5636 states. [2018-11-12 18:44:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5636 states to 5636 states and 7529 transitions. [2018-11-12 18:44:33,874 INFO L78 Accepts]: Start accepts. Automaton has 5636 states and 7529 transitions. Word has length 295 [2018-11-12 18:44:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:33,875 INFO L480 AbstractCegarLoop]: Abstraction has 5636 states and 7529 transitions. [2018-11-12 18:44:33,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 18:44:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 5636 states and 7529 transitions. [2018-11-12 18:44:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-11-12 18:44:33,888 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:33,888 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:44:33,889 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:33,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1506538887, now seen corresponding path program 1 times [2018-11-12 18:44:33,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:33,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:33,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:33,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:33,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 85 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:34,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:34,430 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:34,430 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2018-11-12 18:44:34,430 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [784], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:34,433 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:34,434 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:34,509 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:34,937 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:44:34,937 INFO L272 AbstractInterpreter]: Visited 140 different actions 553 times. Merged at 7 different actions 26 times. Never widened. Performed 8205 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:44:34,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:34,945 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:44:35,774 INFO L227 lantSequenceWeakener]: Weakened 298 states. On average, predicates are now at 73.45% of their original sizes. [2018-11-12 18:44:35,774 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:44:35,939 INFO L415 sIntCurrentIteration]: We unified 300 AI predicates to 300 [2018-11-12 18:44:35,939 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:44:35,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:44:35,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2018-11-12 18:44:35,939 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:44:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:44:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:44:35,940 INFO L87 Difference]: Start difference. First operand 5636 states and 7529 transitions. Second operand 10 states. [2018-11-12 18:44:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:42,121 INFO L93 Difference]: Finished difference Result 10503 states and 14971 transitions. [2018-11-12 18:44:42,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:44:42,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 301 [2018-11-12 18:44:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:42,150 INFO L225 Difference]: With dead ends: 10503 [2018-11-12 18:44:42,150 INFO L226 Difference]: Without dead ends: 6994 [2018-11-12 18:44:42,168 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 307 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-12 18:44:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2018-11-12 18:44:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 6982. [2018-11-12 18:44:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6982 states. [2018-11-12 18:44:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 9250 transitions. [2018-11-12 18:44:42,320 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 9250 transitions. Word has length 301 [2018-11-12 18:44:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:42,321 INFO L480 AbstractCegarLoop]: Abstraction has 6982 states and 9250 transitions. [2018-11-12 18:44:42,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:44:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 9250 transitions. [2018-11-12 18:44:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-12 18:44:42,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:42,344 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:44:42,344 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:42,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1642426702, now seen corresponding path program 1 times [2018-11-12 18:44:42,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:42,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:42,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:42,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:42,346 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 236 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:43,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:43,738 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:43,739 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2018-11-12 18:44:43,739 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [574], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:43,741 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:43,741 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:43,787 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:44,605 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:44:44,606 INFO L272 AbstractInterpreter]: Visited 127 different actions 753 times. Merged at 8 different actions 50 times. Widened at 1 different actions 2 times. Performed 10628 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10628 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:44:44,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:44,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:44:44,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:44,635 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 18:44:44,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:44,656 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:44:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:44,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:44:45,988 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-11-12 18:44:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:44:46,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:44:46,481 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-12 18:44:46,683 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-11-12 18:44:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 321 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-12 18:44:47,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:44:47,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 23 [2018-11-12 18:44:47,430 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:44:47,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 18:44:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 18:44:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:44:47,432 INFO L87 Difference]: Start difference. First operand 6982 states and 9250 transitions. Second operand 21 states. [2018-11-12 18:44:47,694 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-11-12 18:44:55,775 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2018-11-12 18:44:57,821 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-11-12 18:44:58,176 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2018-11-12 18:45:00,110 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2018-11-12 18:45:02,251 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2018-11-12 18:45:04,457 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2018-11-12 18:45:08,442 WARN L179 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2018-11-12 18:45:15,204 WARN L179 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2018-11-12 18:45:21,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:21,440 INFO L93 Difference]: Finished difference Result 23486 states and 39531 transitions. [2018-11-12 18:45:21,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-11-12 18:45:21,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 354 [2018-11-12 18:45:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:21,544 INFO L225 Difference]: With dead ends: 23486 [2018-11-12 18:45:21,544 INFO L226 Difference]: Without dead ends: 14185 [2018-11-12 18:45:21,655 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 796 SyntacticMatches, 5 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8476 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3262, Invalid=18790, Unknown=0, NotChecked=0, Total=22052 [2018-11-12 18:45:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2018-11-12 18:45:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 12389. [2018-11-12 18:45:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12389 states. [2018-11-12 18:45:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12389 states to 12389 states and 16165 transitions. [2018-11-12 18:45:22,098 INFO L78 Accepts]: Start accepts. Automaton has 12389 states and 16165 transitions. Word has length 354 [2018-11-12 18:45:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:45:22,099 INFO L480 AbstractCegarLoop]: Abstraction has 12389 states and 16165 transitions. [2018-11-12 18:45:22,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 18:45:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12389 states and 16165 transitions. [2018-11-12 18:45:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2018-11-12 18:45:22,129 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:45:22,129 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:45:22,129 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:45:22,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1535344513, now seen corresponding path program 1 times [2018-11-12 18:45:22,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:45:22,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:22,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:22,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:22,131 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:45:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 81 proven. 229 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-12 18:45:22,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:22,851 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:45:22,851 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 362 with the following transitions: [2018-11-12 18:45:22,851 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [562], [563], [567], [571], [575], [579], [583], [587], [591], [594], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:45:22,853 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:45:22,854 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:45:22,906 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:45:23,703 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:45:23,703 INFO L272 AbstractInterpreter]: Visited 137 different actions 678 times. Merged at 8 different actions 39 times. Widened at 1 different actions 1 times. Performed 10736 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10736 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:45:23,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:23,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:45:23,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:23,710 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 18:45:23,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:23,719 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:45:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:23,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:45:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:45:24,163 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:45:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:45:24,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:45:24,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 17 [2018-11-12 18:45:24,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:45:24,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 18:45:24,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 18:45:24,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-11-12 18:45:24,864 INFO L87 Difference]: Start difference. First operand 12389 states and 16165 transitions. Second operand 15 states. [2018-11-12 18:45:27,539 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-11-12 18:45:37,077 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2018-11-12 18:45:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:48,040 INFO L93 Difference]: Finished difference Result 44120 states and 72709 transitions. [2018-11-12 18:45:48,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-11-12 18:45:48,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 361 [2018-11-12 18:45:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:48,306 INFO L225 Difference]: With dead ends: 44120 [2018-11-12 18:45:48,307 INFO L226 Difference]: Without dead ends: 32949 [2018-11-12 18:45:48,469 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 800 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1598, Invalid=9322, Unknown=0, NotChecked=0, Total=10920 [2018-11-12 18:45:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32949 states. [2018-11-12 18:45:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32949 to 30700. [2018-11-12 18:45:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30700 states. [2018-11-12 18:45:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30700 states to 30700 states and 39525 transitions. [2018-11-12 18:45:49,591 INFO L78 Accepts]: Start accepts. Automaton has 30700 states and 39525 transitions. Word has length 361 [2018-11-12 18:45:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:45:49,592 INFO L480 AbstractCegarLoop]: Abstraction has 30700 states and 39525 transitions. [2018-11-12 18:45:49,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 18:45:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 30700 states and 39525 transitions. [2018-11-12 18:45:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-11-12 18:45:49,630 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:45:49,630 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:45:49,631 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:45:49,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1503537186, now seen corresponding path program 1 times [2018-11-12 18:45:49,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:45:49,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:49,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:49,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:49,632 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:45:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:50,078 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 18:45:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 149 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:45:51,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:51,132 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:45:51,132 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 377 with the following transitions: [2018-11-12 18:45:51,133 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [317], [319], [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], [594], [595], [599], [603], [607], [611], [615], [626], [629], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:45:51,135 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:45:51,135 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:45:51,238 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:45:51,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:45:51,991 INFO L272 AbstractInterpreter]: Visited 137 different actions 541 times. Merged at 8 different actions 28 times. Never widened. Performed 9051 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9051 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:45:51,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:51,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:45:51,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:51,996 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 18:45:52,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:52,005 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:45:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:52,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:46:00,408 WARN L179 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 151 DAG size of output: 24 [2018-11-12 18:46:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 137 proven. 191 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:46:02,490 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:46:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 326 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-11-12 18:46:03,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:46:03,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 5] total 26 [2018-11-12 18:46:03,340 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:46:03,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 18:46:03,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 18:46:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=550, Unknown=2, NotChecked=0, Total=650 [2018-11-12 18:46:03,342 INFO L87 Difference]: Start difference. First operand 30700 states and 39525 transitions. Second operand 24 states. [2018-11-12 18:46:03,819 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2018-11-12 18:46:08,801 WARN L179 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2018-11-12 18:46:10,841 WARN L179 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 49 DAG size of output: 45 Received shutdown request... [2018-11-12 18:46:24,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 18:46:24,367 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:46:24,374 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:46:24,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:46:24 BoogieIcfgContainer [2018-11-12 18:46:24,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:46:24,376 INFO L168 Benchmark]: Toolchain (without parser) took 224579.05 ms. Allocated memory was 1.5 GB in the beginning and 4.4 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-12 18:46:24,377 INFO L168 Benchmark]: CDTParser took 0.19 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 18:46:24,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 933.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:24,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 177.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -842.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:24,389 INFO L168 Benchmark]: Boogie Preprocessor took 147.22 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 18:46:24,389 INFO L168 Benchmark]: RCFGBuilder took 5302.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 186.1 MB). Peak memory consumption was 186.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:24,390 INFO L168 Benchmark]: TraceAbstraction took 218012.99 ms. Allocated memory was 2.3 GB in the beginning and 4.4 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -493.2 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-12 18:46:24,396 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 933.21 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 177.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -842.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.22 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 5302.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 186.1 MB). Peak memory consumption was 186.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218012.99 ms. Allocated memory was 2.3 GB in the beginning and 4.4 GB in the end (delta: 2.2 GB). Free memory was 2.0 GB in the beginning and 2.5 GB in the end (delta: -493.2 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 141]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 141). Cancelled while BasicCegarLoop was constructing difference of abstraction (30700states) and FLOYD_HOARE automaton (currently 31 states, 24 states before enhancement),while ReachableStatesComputation was computing reachable states (1503 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 217.9s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 177.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3517 SDtfs, 28378 SDslu, 5684 SDs, 0 SdLazy, 51403 SolverSat, 9056 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 87.6s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 4286 GetRequests, 3845 SyntacticMatches, 11 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13613 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30700occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.4s AbstIntTime, 9 AbstIntIterations, 6 AbstIntStrong, 0.9977843961177306 AbsIntWeakeningRatio, 0.1048906048906049 AbsIntAvgWeakeningVarsNumRemoved, 22.94272844272844 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 4502 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 22.1s InterpolantComputationTime, 4321 NumberOfCodeBlocks, 4321 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5393 ConstructedInterpolants, 14 QuantifiedInterpolants, 14179046 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1832 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 3481/4987 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown