java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:04:15,546 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:04:15,548 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:04:15,565 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:04:15,565 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:04:15,566 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:04:15,568 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:04:15,571 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:04:15,573 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:04:15,581 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:04:15,582 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:04:15,582 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:04:15,584 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:04:15,585 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:04:15,587 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:04:15,588 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:04:15,591 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:04:15,593 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:04:15,598 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:04:15,599 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:04:15,602 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:04:15,604 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:04:15,606 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:04:15,606 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:04:15,606 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:04:15,607 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:04:15,608 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:04:15,609 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:04:15,610 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:04:15,611 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:04:15,611 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:04:15,611 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:04:15,612 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:04:15,612 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:04:15,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:04:15,613 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:04:15,614 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 [2018-11-07 18:04:15,630 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:04:15,630 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:04:15,633 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:04:15,633 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:04:15,633 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:04:15,633 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:04:15,633 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:04:15,634 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:04:15,634 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:04:15,634 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:04:15,635 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:04:15,635 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:04:15,635 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:04:15,636 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:04:15,636 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:04:15,636 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:04:15,636 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:04:15,636 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:04:15,637 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:04:15,637 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:04:15,637 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:04:15,637 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:04:15,637 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:04:15,638 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:04:15,639 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:04:15,639 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:04:15,640 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:04:15,640 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:04:15,640 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:04:15,640 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:04:15,640 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:04:15,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:04:15,641 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:04:15,641 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:04:15,641 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:04:15,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:04:15,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:04:15,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:04:15,715 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:04:15,716 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:04:15,716 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 18:04:15,769 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9158de32e/715da80065e549778e1ba9a6d79116b1/FLAG5eedfad95 [2018-11-07 18:04:16,436 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:04:16,439 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 18:04:16,457 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9158de32e/715da80065e549778e1ba9a6d79116b1/FLAG5eedfad95 [2018-11-07 18:04:16,479 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9158de32e/715da80065e549778e1ba9a6d79116b1 [2018-11-07 18:04:16,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:04:16,497 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:04:16,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:16,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:04:16,505 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:04:16,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:16" (1/1) ... [2018-11-07 18:04:16,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0bb127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:16, skipping insertion in model container [2018-11-07 18:04:16,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:16" (1/1) ... [2018-11-07 18:04:16,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:04:16,608 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:04:17,105 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:17,109 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:04:17,262 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:17,281 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:04:17,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17 WrapperNode [2018-11-07 18:04:17,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:17,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:17,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:04:17,283 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:04:17,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:17,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:04:17,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:04:17,444 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:04:17,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (1/1) ... [2018-11-07 18:04:17,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:04:17,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:04:17,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:04:17,565 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:04:17,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (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 [2018-11-07 18:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:04:17,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:04:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:04:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:04:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:04:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:04:17,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:04:21,723 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:04:21,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:21 BoogieIcfgContainer [2018-11-07 18:04:21,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:04:21,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:04:21,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:04:21,731 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:04:21,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:04:16" (1/3) ... [2018-11-07 18:04:21,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef82a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:21, skipping insertion in model container [2018-11-07 18:04:21,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:17" (2/3) ... [2018-11-07 18:04:21,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef82a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:21, skipping insertion in model container [2018-11-07 18:04:21,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:21" (3/3) ... [2018-11-07 18:04:21,735 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label52_false-unreach-call_false-termination.c [2018-11-07 18:04:21,745 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:04:21,755 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:04:21,773 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:04:21,821 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:04:21,822 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:04:21,822 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:04:21,822 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:04:21,822 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:04:21,823 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:04:21,823 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:04:21,823 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:04:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 18:04:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-07 18:04:21,861 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:21,862 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] [2018-11-07 18:04:21,864 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:21,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1208637865, now seen corresponding path program 1 times [2018-11-07 18:04:21,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:21,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:21,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:21,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:21,925 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:22,365 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:22,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:04:22,365 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:22,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:04:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:04:22,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:22,393 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 18:04:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:24,249 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 18:04:24,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:04:24,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-11-07 18:04:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:24,272 INFO L225 Difference]: With dead ends: 691 [2018-11-07 18:04:24,273 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 18:04:24,281 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 18:04:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 18:04:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 18:04:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 18:04:24,371 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 29 [2018-11-07 18:04:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:24,371 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 18:04:24,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:04:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 18:04:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 18:04:24,379 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:24,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:24,380 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:24,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1035560415, now seen corresponding path program 1 times [2018-11-07 18:04:24,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:24,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:24,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:24,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:24,383 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:24,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:24,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:04:24,689 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:24,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:04:24,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:04:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:04:24,692 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 18:04:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:26,828 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 18:04:26,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:04:26,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-11-07 18:04:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:26,836 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 18:04:26,836 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 18:04:26,839 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 [2018-11-07 18:04:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 18:04:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 18:04:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 18:04:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 18:04:26,883 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 116 [2018-11-07 18:04:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:26,884 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 18:04:26,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:04:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 18:04:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 18:04:26,890 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:26,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:26,891 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:26,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2098713064, now seen corresponding path program 1 times [2018-11-07 18:04:26,892 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:26,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:26,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:26,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:26,894 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:27,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:27,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:04:27,101 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:27,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:04:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:04:27,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:04:27,103 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 18:04:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:30,933 INFO L93 Difference]: Finished difference Result 2352 states and 4016 transitions. [2018-11-07 18:04:30,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:04:30,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2018-11-07 18:04:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:30,947 INFO L225 Difference]: With dead ends: 2352 [2018-11-07 18:04:30,947 INFO L226 Difference]: Without dead ends: 1733 [2018-11-07 18:04:30,953 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 [2018-11-07 18:04:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2018-11-07 18:04:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1733. [2018-11-07 18:04:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 18:04:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2647 transitions. [2018-11-07 18:04:31,040 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2647 transitions. Word has length 125 [2018-11-07 18:04:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:31,041 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 2647 transitions. [2018-11-07 18:04:31,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:04:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2647 transitions. [2018-11-07 18:04:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-11-07 18:04:31,060 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:31,060 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:04:31,060 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:31,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -839398590, now seen corresponding path program 1 times [2018-11-07 18:04:31,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:31,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:31,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:31,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:31,062 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:31,603 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-11-07 18:04:31,974 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:04:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 44 proven. 107 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:04:32,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:32,309 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:32,310 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 255 with the following transitions: [2018-11-07 18:04:32,312 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:32,365 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:32,366 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:33,029 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:33,031 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:04:33,033 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:04:33,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:33,079 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:04:33,709 INFO L227 lantSequenceWeakener]: Weakened 245 states. On average, predicates are now at 77.46% of their original sizes. [2018-11-07 18:04:33,709 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:04:34,088 INFO L415 sIntCurrentIteration]: We unified 253 AI predicates to 253 [2018-11-07 18:04:34,091 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:04:34,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:04:34,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 18:04:34,093 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:34,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:04:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:04:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:04:34,095 INFO L87 Difference]: Start difference. First operand 1733 states and 2647 transitions. Second operand 7 states. [2018-11-07 18:04:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:43,157 INFO L93 Difference]: Finished difference Result 3645 states and 5568 transitions. [2018-11-07 18:04:43,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:04:43,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2018-11-07 18:04:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:43,174 INFO L225 Difference]: With dead ends: 3645 [2018-11-07 18:04:43,174 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 18:04:43,183 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 254 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:04:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 18:04:43,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2018-11-07 18:04:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 18:04:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2838 transitions. [2018-11-07 18:04:43,238 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2838 transitions. Word has length 254 [2018-11-07 18:04:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:43,238 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2838 transitions. [2018-11-07 18:04:43,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:04:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2838 transitions. [2018-11-07 18:04:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-11-07 18:04:43,248 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:43,249 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:43,249 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:43,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1746897264, now seen corresponding path program 1 times [2018-11-07 18:04:43,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:43,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:43,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:43,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:43,251 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 154 proven. 189 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:04:44,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:44,122 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:44,122 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 340 with the following transitions: [2018-11-07 18:04:44,123 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:44,128 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:44,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:44,340 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:44,550 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:04:44,550 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:04:44,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:44,590 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:04:45,564 INFO L227 lantSequenceWeakener]: Weakened 120 states. On average, predicates are now at 78.01% of their original sizes. [2018-11-07 18:04:45,564 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:04:47,160 INFO L415 sIntCurrentIteration]: We unified 338 AI predicates to 338 [2018-11-07 18:04:47,160 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:04:47,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:04:47,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-11-07 18:04:47,161 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:47,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 18:04:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 18:04:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:04:47,163 INFO L87 Difference]: Start difference. First operand 1916 states and 2838 transitions. Second operand 23 states. [2018-11-07 18:05:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:05,899 INFO L93 Difference]: Finished difference Result 4357 states and 6366 transitions. [2018-11-07 18:05:05,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-07 18:05:05,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 339 [2018-11-07 18:05:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:05,911 INFO L225 Difference]: With dead ends: 4357 [2018-11-07 18:05:05,912 INFO L226 Difference]: Without dead ends: 1921 [2018-11-07 18:05:05,921 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 353 GetRequests, 311 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 18:05:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2018-11-07 18:05:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1916. [2018-11-07 18:05:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1916 states. [2018-11-07 18:05:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2832 transitions. [2018-11-07 18:05:05,973 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2832 transitions. Word has length 339 [2018-11-07 18:05:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:05,974 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 2832 transitions. [2018-11-07 18:05:05,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 18:05:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2832 transitions. [2018-11-07 18:05:05,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2018-11-07 18:05:05,984 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:05,984 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:05,985 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:05,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1127648740, now seen corresponding path program 1 times [2018-11-07 18:05:05,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:05,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:05,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:05,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:05,987 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:06,503 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:06,702 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:05:06,904 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:07,264 WARN L179 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:05:07,791 WARN L179 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-11-07 18:05:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 316 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:05:08,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:08,379 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:08,379 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 366 with the following transitions: [2018-11-07 18:05:08,379 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:08,384 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:08,384 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:08,450 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:08,518 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:08,518 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:05:08,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:08,555 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:08,949 INFO L227 lantSequenceWeakener]: Weakened 30 states. On average, predicates are now at 80.21% of their original sizes. [2018-11-07 18:05:08,949 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:09,294 INFO L415 sIntCurrentIteration]: We unified 364 AI predicates to 364 [2018-11-07 18:05:09,295 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:09,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:09,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 18:05:09,295 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:09,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:05:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:05:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:05:09,297 INFO L87 Difference]: Start difference. First operand 1916 states and 2832 transitions. Second operand 21 states. [2018-11-07 18:05:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:24,799 INFO L93 Difference]: Finished difference Result 4020 states and 6042 transitions. [2018-11-07 18:05:24,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 18:05:24,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 365 [2018-11-07 18:05:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:24,814 INFO L225 Difference]: With dead ends: 4020 [2018-11-07 18:05:24,814 INFO L226 Difference]: Without dead ends: 2293 [2018-11-07 18:05:24,824 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 382 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 18:05:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-07 18:05:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-07 18:05:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-07 18:05:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3234 transitions. [2018-11-07 18:05:24,892 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3234 transitions. Word has length 365 [2018-11-07 18:05:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:24,892 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3234 transitions. [2018-11-07 18:05:24,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:05:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3234 transitions. [2018-11-07 18:05:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-11-07 18:05:24,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:24,908 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:24,908 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:24,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2054446806, now seen corresponding path program 1 times [2018-11-07 18:05:24,909 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:24,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:24,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:24,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:24,910 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 181 proven. 166 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-07 18:05:25,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:25,905 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:25,906 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 451 with the following transitions: [2018-11-07 18:05:25,906 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:25,910 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:25,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:25,980 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:26,151 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:26,151 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:05:26,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:26,156 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:26,539 INFO L227 lantSequenceWeakener]: Weakened 164 states. On average, predicates are now at 77.81% of their original sizes. [2018-11-07 18:05:26,539 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:26,962 INFO L415 sIntCurrentIteration]: We unified 449 AI predicates to 449 [2018-11-07 18:05:26,962 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:26,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:26,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 18:05:26,963 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:26,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 18:05:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 18:05:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-11-07 18:05:26,964 INFO L87 Difference]: Start difference. First operand 2288 states and 3234 transitions. Second operand 22 states. [2018-11-07 18:05:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:43,881 INFO L93 Difference]: Finished difference Result 4844 states and 6896 transitions. [2018-11-07 18:05:43,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:05:43,883 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 450 [2018-11-07 18:05:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:43,894 INFO L225 Difference]: With dead ends: 4844 [2018-11-07 18:05:43,894 INFO L226 Difference]: Without dead ends: 2293 [2018-11-07 18:05:43,905 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 470 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 18:05:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2018-11-07 18:05:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2288. [2018-11-07 18:05:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2018-11-07 18:05:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3212 transitions. [2018-11-07 18:05:43,981 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3212 transitions. Word has length 450 [2018-11-07 18:05:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:43,982 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 3212 transitions. [2018-11-07 18:05:43,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 18:05:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3212 transitions. [2018-11-07 18:05:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-11-07 18:05:44,000 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:44,001 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:44,001 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:44,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:44,002 INFO L82 PathProgramCache]: Analyzing trace with hash -834363183, now seen corresponding path program 1 times [2018-11-07 18:05:44,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:44,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:44,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:44,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:44,003 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 320 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 18:05:44,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:44,847 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:44,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 476 with the following transitions: [2018-11-07 18:05:44,847 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:44,850 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:44,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:44,916 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:45,873 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:45,873 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:05:45,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:45,911 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:46,293 INFO L227 lantSequenceWeakener]: Weakened 472 states. On average, predicates are now at 80.14% of their original sizes. [2018-11-07 18:05:46,294 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:46,470 INFO L415 sIntCurrentIteration]: We unified 474 AI predicates to 474 [2018-11-07 18:05:46,470 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:46,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:46,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:05:46,471 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:46,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:05:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:05:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:05:46,472 INFO L87 Difference]: Start difference. First operand 2288 states and 3212 transitions. Second operand 10 states. [2018-11-07 18:05:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:50,275 INFO L93 Difference]: Finished difference Result 4400 states and 6472 transitions. [2018-11-07 18:05:50,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:05:50,275 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 475 [2018-11-07 18:05:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:50,288 INFO L225 Difference]: With dead ends: 4400 [2018-11-07 18:05:50,288 INFO L226 Difference]: Without dead ends: 2673 [2018-11-07 18:05:50,297 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 482 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:05:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2018-11-07 18:05:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2662. [2018-11-07 18:05:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2018-11-07 18:05:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3722 transitions. [2018-11-07 18:05:50,365 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3722 transitions. Word has length 475 [2018-11-07 18:05:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:50,366 INFO L480 AbstractCegarLoop]: Abstraction has 2662 states and 3722 transitions. [2018-11-07 18:05:50,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:05:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3722 transitions. [2018-11-07 18:05:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-11-07 18:05:50,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:50,377 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:50,377 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:50,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash 287781920, now seen corresponding path program 1 times [2018-11-07 18:05:50,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:50,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:50,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:50,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:50,379 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 322 proven. 321 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-07 18:05:51,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:51,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:51,911 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 543 with the following transitions: [2018-11-07 18:05:51,911 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:51,915 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:51,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:52,140 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:52,824 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:05:52,825 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:05:52,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:52,833 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:05:52,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:52,833 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:05:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:52,844 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:05:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:53,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 620 proven. 2 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-11-07 18:05:53,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 320 proven. 111 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-07 18:05:54,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:05:54,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:05:54,947 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:05:54,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:05:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:05:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:05:54,949 INFO L87 Difference]: Start difference. First operand 2662 states and 3722 transitions. Second operand 17 states. [2018-11-07 18:05:58,727 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 18:05:59,210 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-11-07 18:06:00,843 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 18:06:04,124 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-11-07 18:06:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:07,392 INFO L93 Difference]: Finished difference Result 7343 states and 11252 transitions. [2018-11-07 18:06:07,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 18:06:07,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 542 [2018-11-07 18:06:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:07,420 INFO L225 Difference]: With dead ends: 7343 [2018-11-07 18:06:07,420 INFO L226 Difference]: Without dead ends: 5242 [2018-11-07 18:06:07,446 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1117 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:06:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2018-11-07 18:06:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 5124. [2018-11-07 18:06:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5124 states. [2018-11-07 18:06:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 6935 transitions. [2018-11-07 18:06:07,611 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 6935 transitions. Word has length 542 [2018-11-07 18:06:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:07,612 INFO L480 AbstractCegarLoop]: Abstraction has 5124 states and 6935 transitions. [2018-11-07 18:06:07,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:06:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 6935 transitions. [2018-11-07 18:06:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2018-11-07 18:06:07,629 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:07,630 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:07,630 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:07,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2018425497, now seen corresponding path program 1 times [2018-11-07 18:06:07,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:07,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:07,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,632 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:09,017 WARN L179 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 18:06:09,304 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-11-07 18:06:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 429 proven. 457 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-11-07 18:06:10,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:10,228 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:10,229 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 549 with the following transitions: [2018-11-07 18:06:10,229 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:10,233 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:10,233 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:10,386 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:11,290 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:11,291 INFO L272 AbstractInterpreter]: Visited 125 different actions 622 times. Merged at 10 different actions 44 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:11,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:11,328 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:11,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:11,329 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:11,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:11,343 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:11,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:11,844 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:06:12,144 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:06:12,481 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 18:06:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 791 proven. 2 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-11-07 18:06:12,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:13,114 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:06:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 423 proven. 111 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-11-07 18:06:13,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:13,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:06:13,897 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:13,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:06:13,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:06:13,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:06:13,899 INFO L87 Difference]: Start difference. First operand 5124 states and 6935 transitions. Second operand 17 states. [2018-11-07 18:06:14,347 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2018-11-07 18:06:20,252 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-07 18:06:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:21,153 INFO L93 Difference]: Finished difference Result 11121 states and 15957 transitions. [2018-11-07 18:06:21,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-07 18:06:21,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 548 [2018-11-07 18:06:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:21,185 INFO L225 Difference]: With dead ends: 11121 [2018-11-07 18:06:21,185 INFO L226 Difference]: Without dead ends: 5443 [2018-11-07 18:06:21,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 1107 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 18:06:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2018-11-07 18:06:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 5311. [2018-11-07 18:06:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5311 states. [2018-11-07 18:06:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5311 states to 5311 states and 6313 transitions. [2018-11-07 18:06:21,361 INFO L78 Accepts]: Start accepts. Automaton has 5311 states and 6313 transitions. Word has length 548 [2018-11-07 18:06:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:21,362 INFO L480 AbstractCegarLoop]: Abstraction has 5311 states and 6313 transitions. [2018-11-07 18:06:21,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:06:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5311 states and 6313 transitions. [2018-11-07 18:06:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2018-11-07 18:06:21,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:21,375 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:21,376 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:21,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1952249540, now seen corresponding path program 2 times [2018-11-07 18:06:21,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:21,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:21,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:21,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:21,378 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 461 proven. 111 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 18:06:22,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:22,215 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:22,215 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 18:06:22,216 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 18:06:22,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:22,216 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:22,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 18:06:22,226 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 18:06:22,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-07 18:06:22,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 18:06:22,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:22,619 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 18:06:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2018-11-07 18:06:22,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2018-11-07 18:06:23,235 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:23,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-07 18:06:23,236 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:23,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:06:23,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:06:23,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:06:23,237 INFO L87 Difference]: Start difference. First operand 5311 states and 6313 transitions. Second operand 3 states. [2018-11-07 18:06:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:24,639 INFO L93 Difference]: Finished difference Result 12772 states and 15465 transitions. [2018-11-07 18:06:24,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:06:24,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 653 [2018-11-07 18:06:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:24,686 INFO L225 Difference]: With dead ends: 12772 [2018-11-07 18:06:24,687 INFO L226 Difference]: Without dead ends: 8022 [2018-11-07 18:06:24,700 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1305 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:06:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2018-11-07 18:06:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 8010. [2018-11-07 18:06:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8010 states. [2018-11-07 18:06:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8010 states to 8010 states and 9284 transitions. [2018-11-07 18:06:24,875 INFO L78 Accepts]: Start accepts. Automaton has 8010 states and 9284 transitions. Word has length 653 [2018-11-07 18:06:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:24,876 INFO L480 AbstractCegarLoop]: Abstraction has 8010 states and 9284 transitions. [2018-11-07 18:06:24,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:06:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 9284 transitions. [2018-11-07 18:06:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2018-11-07 18:06:24,895 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:24,896 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:06:24,896 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:24,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1073650876, now seen corresponding path program 1 times [2018-11-07 18:06:24,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:24,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:24,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 18:06:24,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:24,898 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 461 proven. 175 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 18:06:25,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:25,961 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:25,961 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 718 with the following transitions: [2018-11-07 18:06:25,961 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:25,965 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:25,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:26,217 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:27,402 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:27,403 INFO L272 AbstractInterpreter]: Visited 191 different actions 954 times. Merged at 9 different actions 47 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:27,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:27,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:27,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:27,428 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:27,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:27,446 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:27,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 931 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 18:06:27,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 461 proven. 175 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2018-11-07 18:06:28,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:28,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:06:28,404 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:28,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:06:28,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:06:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:06:28,406 INFO L87 Difference]: Start difference. First operand 8010 states and 9284 transitions. Second operand 7 states. [2018-11-07 18:06:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:31,318 INFO L93 Difference]: Finished difference Result 22303 states and 30134 transitions. [2018-11-07 18:06:31,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:06:31,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 717 [2018-11-07 18:06:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:31,414 INFO L225 Difference]: With dead ends: 22303 [2018-11-07 18:06:31,414 INFO L226 Difference]: Without dead ends: 14854 [2018-11-07 18:06:31,470 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1449 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:06:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14854 states. [2018-11-07 18:06:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14854 to 14494. [2018-11-07 18:06:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14494 states. [2018-11-07 18:06:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 17056 transitions. [2018-11-07 18:06:32,035 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 17056 transitions. Word has length 717 [2018-11-07 18:06:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:32,035 INFO L480 AbstractCegarLoop]: Abstraction has 14494 states and 17056 transitions. [2018-11-07 18:06:32,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:06:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 17056 transitions. [2018-11-07 18:06:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2018-11-07 18:06:32,064 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:32,065 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:32,065 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:32,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1355681563, now seen corresponding path program 1 times [2018-11-07 18:06:32,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:32,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:32,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:32,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:32,067 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 468 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:06:33,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:33,152 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:33,153 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 725 with the following transitions: [2018-11-07 18:06:33,153 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:33,160 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:33,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:33,404 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:34,426 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:34,426 INFO L272 AbstractInterpreter]: Visited 192 different actions 966 times. Merged at 10 different actions 54 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:34,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:34,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:34,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:34,459 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:34,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:34,477 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:34,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 945 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 18:06:35,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:35,620 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:06:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1295 backedges. 468 proven. 175 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-11-07 18:06:36,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:36,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:06:36,456 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:36,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:06:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:06:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:06:36,457 INFO L87 Difference]: Start difference. First operand 14494 states and 17056 transitions. Second operand 7 states. [2018-11-07 18:06:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:38,922 INFO L93 Difference]: Finished difference Result 33853 states and 46730 transitions. [2018-11-07 18:06:38,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:06:38,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 724 [2018-11-07 18:06:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:39,079 INFO L225 Difference]: With dead ends: 33853 [2018-11-07 18:06:39,079 INFO L226 Difference]: Without dead ends: 19920 [2018-11-07 18:06:39,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1464 GetRequests, 1451 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:06:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19920 states. [2018-11-07 18:06:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19920 to 19413. [2018-11-07 18:06:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19413 states. [2018-11-07 18:06:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19413 states to 19413 states and 23350 transitions. [2018-11-07 18:06:39,835 INFO L78 Accepts]: Start accepts. Automaton has 19413 states and 23350 transitions. Word has length 724 [2018-11-07 18:06:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:39,835 INFO L480 AbstractCegarLoop]: Abstraction has 19413 states and 23350 transitions. [2018-11-07 18:06:39,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:06:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19413 states and 23350 transitions. [2018-11-07 18:06:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2018-11-07 18:06:39,875 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:39,875 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:39,876 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:39,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:39,876 INFO L82 PathProgramCache]: Analyzing trace with hash 523964780, now seen corresponding path program 1 times [2018-11-07 18:06:39,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:39,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:39,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:39,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:39,877 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 467 proven. 701 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2018-11-07 18:06:42,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:42,222 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:42,222 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 770 with the following transitions: [2018-11-07 18:06:42,222 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:42,225 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:42,225 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:42,437 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:43,096 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:43,096 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:43,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:43,117 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:43,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:43,117 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:43,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:43,126 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:43,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 1035 proven. 2 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 18:06:44,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:44,474 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-07 18:06:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 513 proven. 175 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-11-07 18:06:45,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:45,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 18:06:45,304 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:45,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:06:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:06:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:06:45,306 INFO L87 Difference]: Start difference. First operand 19413 states and 23350 transitions. Second operand 17 states. [2018-11-07 18:06:48,991 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 18:06:50,339 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 18:06:51,254 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-07 18:06:52,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:52,213 INFO L93 Difference]: Finished difference Result 43439 states and 54597 transitions. [2018-11-07 18:06:52,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 18:06:52,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 769 [2018-11-07 18:06:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:52,310 INFO L225 Difference]: With dead ends: 43439 [2018-11-07 18:06:52,310 INFO L226 Difference]: Without dead ends: 24219 [2018-11-07 18:06:52,403 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1610 GetRequests, 1560 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 18:06:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24219 states. [2018-11-07 18:06:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24219 to 23967. [2018-11-07 18:06:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23967 states. [2018-11-07 18:06:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23967 states to 23967 states and 29277 transitions. [2018-11-07 18:06:52,982 INFO L78 Accepts]: Start accepts. Automaton has 23967 states and 29277 transitions. Word has length 769 [2018-11-07 18:06:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:52,983 INFO L480 AbstractCegarLoop]: Abstraction has 23967 states and 29277 transitions. [2018-11-07 18:06:52,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:06:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23967 states and 29277 transitions. [2018-11-07 18:06:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2018-11-07 18:06:53,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:53,008 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:53,009 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:53,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash -522691446, now seen corresponding path program 1 times [2018-11-07 18:06:53,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:53,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:53,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:53,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:53,010 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 658 proven. 175 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-11-07 18:06:53,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:53,856 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:53,856 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 885 with the following transitions: [2018-11-07 18:06:53,857 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:53,859 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:53,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:54,016 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:55,012 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:55,012 INFO L272 AbstractInterpreter]: Visited 193 different actions 1171 times. Merged at 11 different actions 73 times. Widened at 1 different actions 2 times. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:55,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:55,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:55,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:55,019 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:55,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:55,030 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:55,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 1290 proven. 2 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2018-11-07 18:06:55,612 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 658 proven. 175 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-11-07 18:06:56,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:56,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:06:56,349 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:56,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:06:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:06:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:06:56,351 INFO L87 Difference]: Start difference. First operand 23967 states and 29277 transitions. Second operand 7 states. [2018-11-07 18:06:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:58,328 INFO L93 Difference]: Finished difference Result 46503 states and 57262 transitions. [2018-11-07 18:06:58,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:06:58,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 884 [2018-11-07 18:06:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:58,424 INFO L225 Difference]: With dead ends: 46503 [2018-11-07 18:06:58,424 INFO L226 Difference]: Without dead ends: 22910 [2018-11-07 18:06:58,522 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1783 GetRequests, 1770 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:06:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22910 states. [2018-11-07 18:06:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22910 to 22285. [2018-11-07 18:06:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22285 states. [2018-11-07 18:06:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22285 states to 22285 states and 26156 transitions. [2018-11-07 18:06:59,014 INFO L78 Accepts]: Start accepts. Automaton has 22285 states and 26156 transitions. Word has length 884 [2018-11-07 18:06:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:59,015 INFO L480 AbstractCegarLoop]: Abstraction has 22285 states and 26156 transitions. [2018-11-07 18:06:59,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:06:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22285 states and 26156 transitions. [2018-11-07 18:06:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2018-11-07 18:06:59,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:59,045 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:59,045 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:59,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -758618894, now seen corresponding path program 1 times [2018-11-07 18:06:59,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:59,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:59,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:59,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:59,047 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:59,919 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:07:00,131 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:07:00,360 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:07:00,704 WARN L179 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 18:07:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 541 proven. 1222 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2018-11-07 18:07:03,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:03,019 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:03,019 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 980 with the following transitions: [2018-11-07 18:07:03,019 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:03,022 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:03,022 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:03,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:04,076 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:04,076 INFO L272 AbstractInterpreter]: Visited 194 different actions 982 times. Merged at 11 different actions 60 times. Widened at 1 different actions 1 times. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:04,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:04,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:04,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:04,115 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:04,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:04,130 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:04,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1768 proven. 2 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2018-11-07 18:07:05,363 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 542 proven. 424 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2018-11-07 18:07:06,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:06,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:07:06,512 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:06,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:07:06,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:07:06,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:06,514 INFO L87 Difference]: Start difference. First operand 22285 states and 26156 transitions. Second operand 18 states. [2018-11-07 18:07:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:15,704 INFO L93 Difference]: Finished difference Result 40299 states and 47617 transitions. [2018-11-07 18:07:15,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 18:07:15,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 979 [2018-11-07 18:07:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:15,747 INFO L225 Difference]: With dead ends: 40299 [2018-11-07 18:07:15,747 INFO L226 Difference]: Without dead ends: 18388 [2018-11-07 18:07:15,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 1985 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-07 18:07:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18388 states. [2018-11-07 18:07:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18388 to 18043. [2018-11-07 18:07:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18043 states. [2018-11-07 18:07:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18043 states to 18043 states and 20355 transitions. [2018-11-07 18:07:16,109 INFO L78 Accepts]: Start accepts. Automaton has 18043 states and 20355 transitions. Word has length 979 [2018-11-07 18:07:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:16,110 INFO L480 AbstractCegarLoop]: Abstraction has 18043 states and 20355 transitions. [2018-11-07 18:07:16,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:07:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18043 states and 20355 transitions. [2018-11-07 18:07:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1025 [2018-11-07 18:07:16,135 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:16,135 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:16,136 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:16,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1558803585, now seen corresponding path program 1 times [2018-11-07 18:07:16,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:16,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:16,137 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 6 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-11-07 18:07:17,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:17,499 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:17,499 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1025 with the following transitions: [2018-11-07 18:07:17,500 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:17,502 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:17,502 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:17,650 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:18,461 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:18,461 INFO L272 AbstractInterpreter]: Visited 194 different actions 1179 times. Merged at 11 different actions 74 times. Widened at 1 different actions 2 times. Found 25 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:18,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:18,468 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:18,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:18,468 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:18,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:18,478 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:18,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 6 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2018-11-07 18:07:19,548 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 1443 proven. 175 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-07 18:07:20,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:20,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-07 18:07:20,623 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:20,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:07:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:07:20,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:07:20,626 INFO L87 Difference]: Start difference. First operand 18043 states and 20355 transitions. Second operand 9 states. [2018-11-07 18:07:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:23,992 INFO L93 Difference]: Finished difference Result 41502 states and 47576 transitions. [2018-11-07 18:07:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:07:23,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1024 [2018-11-07 18:07:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:24,042 INFO L225 Difference]: With dead ends: 41502 [2018-11-07 18:07:24,042 INFO L226 Difference]: Without dead ends: 23833 [2018-11-07 18:07:24,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2067 GetRequests, 2047 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:07:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23833 states. [2018-11-07 18:07:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23833 to 23250. [2018-11-07 18:07:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23250 states. [2018-11-07 18:07:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23250 states to 23250 states and 26429 transitions. [2018-11-07 18:07:24,494 INFO L78 Accepts]: Start accepts. Automaton has 23250 states and 26429 transitions. Word has length 1024 [2018-11-07 18:07:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:24,495 INFO L480 AbstractCegarLoop]: Abstraction has 23250 states and 26429 transitions. [2018-11-07 18:07:24,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:07:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23250 states and 26429 transitions. [2018-11-07 18:07:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1156 [2018-11-07 18:07:24,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:24,538 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:24,538 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:24,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 390740381, now seen corresponding path program 1 times [2018-11-07 18:07:24,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:24,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:24,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:24,540 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 859 proven. 1897 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:07:28,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:28,272 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:28,273 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1156 with the following transitions: [2018-11-07 18:07:28,273 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:28,276 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:28,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:28,574 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:29,425 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:29,426 INFO L272 AbstractInterpreter]: Visited 195 different actions 1186 times. Merged at 12 different actions 75 times. Widened at 1 different actions 2 times. Found 28 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:07:29,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:29,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:29,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:29,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:29,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:29,445 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:29,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 1801 proven. 2 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2018-11-07 18:07:30,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:30,899 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 18:07:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 910 proven. 130 refuted. 0 times theorem prover too weak. 2433 trivial. 0 not checked. [2018-11-07 18:07:31,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:31,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 19 [2018-11-07 18:07:31,895 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:31,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:07:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:07:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:07:31,897 INFO L87 Difference]: Start difference. First operand 23250 states and 26429 transitions. Second operand 18 states. [2018-11-07 18:07:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:39,410 INFO L93 Difference]: Finished difference Result 44886 states and 51248 transitions. [2018-11-07 18:07:39,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-07 18:07:39,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1155 [2018-11-07 18:07:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:39,453 INFO L225 Difference]: With dead ends: 44886 [2018-11-07 18:07:39,453 INFO L226 Difference]: Without dead ends: 22010 [2018-11-07 18:07:39,497 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2393 GetRequests, 2338 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=558, Invalid=2198, Unknown=0, NotChecked=0, Total=2756 [2018-11-07 18:07:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22010 states. [2018-11-07 18:07:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22010 to 19681. [2018-11-07 18:07:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19681 states. [2018-11-07 18:07:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19681 states to 19681 states and 21236 transitions. [2018-11-07 18:07:39,807 INFO L78 Accepts]: Start accepts. Automaton has 19681 states and 21236 transitions. Word has length 1155 [2018-11-07 18:07:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:39,808 INFO L480 AbstractCegarLoop]: Abstraction has 19681 states and 21236 transitions. [2018-11-07 18:07:39,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:07:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19681 states and 21236 transitions. [2018-11-07 18:07:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-11-07 18:07:39,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:39,833 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:39,833 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:39,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash -379757479, now seen corresponding path program 1 times [2018-11-07 18:07:39,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:39,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:39,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:39,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:39,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4388 backedges. 1004 proven. 2141 refuted. 0 times theorem prover too weak. 1243 trivial. 0 not checked. [2018-11-07 18:07:42,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:42,772 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:42,773 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1275 with the following transitions: [2018-11-07 18:07:42,773 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [133], [135], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [918], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:42,775 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:42,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:42,974 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:43,887 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:43,887 INFO L272 AbstractInterpreter]: Visited 196 different actions 1197 times. Merged at 13 different actions 80 times. Widened at 1 different actions 2 times. Found 31 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:07:43,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:43,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:43,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:43,896 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:43,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:43,905 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:44,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4388 backedges. 2064 proven. 2 refuted. 0 times theorem prover too weak. 2322 trivial. 0 not checked. [2018-11-07 18:07:44,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-07 18:07:45,292 WARN L187 SmtUtils]: Removed 5 from assertion stack [2018-11-07 18:07:45,292 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:07:45,493 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:45,494 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:07:45,499 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:07:45,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:07:45 BoogieIcfgContainer [2018-11-07 18:07:45,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:07:45,500 INFO L168 Benchmark]: Toolchain (without parser) took 209005.49 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-11-07 18:07:45,501 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:07:45,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:45,502 INFO L168 Benchmark]: Boogie Procedure Inliner took 158.48 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -827.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:45,503 INFO L168 Benchmark]: Boogie Preprocessor took 120.36 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:07:45,503 INFO L168 Benchmark]: RCFGBuilder took 4161.75 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:45,504 INFO L168 Benchmark]: TraceAbstraction took 203772.26 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -825.9 MB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2018-11-07 18:07:45,508 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 783.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 158.48 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -827.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.36 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4161.75 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 203772.26 ms. Allocated memory was 2.2 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 2.9 GB in the end (delta: -825.9 MB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 70). Cancelled while BasicCegarLoop was analyzing trace of length 1275 with TraceHistMax 10,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 203.6s OverallTime, 19 OverallIterations, 10 TraceHistogramMax, 128.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2755 SDtfs, 42396 SDslu, 3927 SDs, 0 SdLazy, 45184 SolverSat, 7079 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 57.4s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 18422 GetRequests, 17922 SyntacticMatches, 18 SemanticMatches, 482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 26.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23967occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.9s AbstIntTime, 15 AbstIntIterations, 5 AbstIntStrong, 0.9972295777517276 AbsIntWeakeningRatio, 0.08839190628328009 AbsIntAvgWeakeningVarsNumRemoved, 17.149094781682642 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 5300 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 31.3s InterpolantComputationTime, 18143 NumberOfCodeBlocks, 17631 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 26100 ConstructedInterpolants, 25 QuantifiedInterpolants, 81274856 SizeOfPredicates, 32 NumberOfNonLiveVariables, 10579 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 38 InterpolantComputations, 5 PerfectInterpolantSequences, 47279/55081 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown