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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:15:47,590 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:15:47,592 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:15:47,605 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:15:47,605 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:15:47,606 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:15:47,607 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:15:47,609 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:15:47,611 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:15:47,612 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:15:47,613 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:15:47,613 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:15:47,614 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:15:47,615 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:15:47,617 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:15:47,617 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:15:47,618 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:15:47,620 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:15:47,625 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:15:47,629 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:15:47,630 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:15:47,632 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:15:47,634 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:15:47,634 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:15:47,634 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:15:47,635 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:15:47,636 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:15:47,637 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:15:47,638 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:15:47,639 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:15:47,639 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:15:47,640 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:15:47,640 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:15:47,640 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:15:47,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:15:47,642 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:15:47,642 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.epf [2018-11-07 15:15:47,670 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:15:47,670 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:15:47,672 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:15:47,672 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:15:47,672 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:15:47,672 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:15:47,673 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:15:47,673 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:15:47,673 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:15:47,673 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:15:47,674 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:15:47,674 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:15:47,675 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:15:47,675 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:15:47,675 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:15:47,675 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:15:47,676 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:15:47,677 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:15:47,677 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:15:47,677 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:15:47,678 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:15:47,678 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:15:47,678 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:15:47,678 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:15:47,678 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:15:47,679 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:15:47,679 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:15:47,679 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:15:47,679 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:15:47,680 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:15:47,680 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:15:47,680 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:15:47,680 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:15:47,680 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:15:47,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:15:47,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:15:47,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:15:47,756 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:15:47,757 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:15:47,758 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label02_true-unreach-call.c [2018-11-07 15:15:47,832 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1735df490/2dafabc257e94763ba6fe4fe974d004d/FLAG402409596 [2018-11-07 15:15:48,580 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:15:48,581 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label02_true-unreach-call.c [2018-11-07 15:15:48,600 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1735df490/2dafabc257e94763ba6fe4fe974d004d/FLAG402409596 [2018-11-07 15:15:48,617 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1735df490/2dafabc257e94763ba6fe4fe974d004d [2018-11-07 15:15:48,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:15:48,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:15:48,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:15:48,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:15:48,637 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:15:48,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c33ac4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:48, skipping insertion in model container [2018-11-07 15:15:48,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:15:48" (1/1) ... [2018-11-07 15:15:48,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:15:48,737 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:15:49,469 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:15:49,474 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:15:49,790 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:15:49,815 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:15:49,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49 WrapperNode [2018-11-07 15:15:49,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:15:49,816 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:15:49,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:15:49,817 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:15:49,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:15:50,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:15:50,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:15:50,041 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:15:50,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (1/1) ... [2018-11-07 15:15:50,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:15:50,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:15:50,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:15:50,208 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:15:50,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (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 15:15:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:15:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:15:50,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:15:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:15:50,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:15:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:15:50,284 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:15:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:15:50,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:15:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:15:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:15:55,972 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:15:55,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:15:55 BoogieIcfgContainer [2018-11-07 15:15:55,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:15:55,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:15:55,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:15:55,978 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:15:55,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:15:48" (1/3) ... [2018-11-07 15:15:55,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:15:55, skipping insertion in model container [2018-11-07 15:15:55,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:15:49" (2/3) ... [2018-11-07 15:15:55,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:15:55, skipping insertion in model container [2018-11-07 15:15:55,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:15:55" (3/3) ... [2018-11-07 15:15:55,982 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label02_true-unreach-call.c [2018-11-07 15:15:55,993 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:15:56,003 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:15:56,021 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:15:56,067 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:15:56,068 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:15:56,068 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:15:56,068 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:15:56,068 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:15:56,068 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:15:56,068 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:15:56,069 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:15:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 15:15:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-07 15:15:56,131 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:15:56,132 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:15:56,135 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:15:56,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:15:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash -730804356, now seen corresponding path program 1 times [2018-11-07 15:15:56,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:15:56,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:15:56,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:15:56,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:15:56,205 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:15:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:15:56,715 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 15:15:56,734 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 15:15:56,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:15:56,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:15:56,737 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:15:56,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:15:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:15:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:15:56,763 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 15:16:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:02,912 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 15:16:02,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:16:02,914 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2018-11-07 15:16:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:02,941 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 15:16:02,941 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 15:16:02,950 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:16:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 15:16:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2018-11-07 15:16:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2018-11-07 15:16:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1954 transitions. [2018-11-07 15:16:03,076 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1954 transitions. Word has length 68 [2018-11-07 15:16:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:03,077 INFO L480 AbstractCegarLoop]: Abstraction has 1097 states and 1954 transitions. [2018-11-07 15:16:03,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:16:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1954 transitions. [2018-11-07 15:16:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-07 15:16:03,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:03,088 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:16:03,088 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:03,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1744489539, now seen corresponding path program 1 times [2018-11-07 15:16:03,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:03,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:03,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:03,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:03,091 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:03,398 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:16:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:03,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:03,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:03,515 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:03,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:03,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:03,518 INFO L87 Difference]: Start difference. First operand 1097 states and 1954 transitions. Second operand 6 states. [2018-11-07 15:16:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:08,572 INFO L93 Difference]: Finished difference Result 3259 states and 5952 transitions. [2018-11-07 15:16:08,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:08,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-11-07 15:16:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:08,606 INFO L225 Difference]: With dead ends: 3259 [2018-11-07 15:16:08,607 INFO L226 Difference]: Without dead ends: 2168 [2018-11-07 15:16:08,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:16:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2018-11-07 15:16:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2142. [2018-11-07 15:16:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2018-11-07 15:16:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3739 transitions. [2018-11-07 15:16:08,720 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3739 transitions. Word has length 139 [2018-11-07 15:16:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:08,721 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 3739 transitions. [2018-11-07 15:16:08,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3739 transitions. [2018-11-07 15:16:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-07 15:16:08,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:08,730 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:08,731 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:08,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:08,731 INFO L82 PathProgramCache]: Analyzing trace with hash -990959541, now seen corresponding path program 1 times [2018-11-07 15:16:08,731 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:08,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:08,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:08,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:08,733 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:09,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:09,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:09,019 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:09,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:09,021 INFO L87 Difference]: Start difference. First operand 2142 states and 3739 transitions. Second operand 6 states. [2018-11-07 15:16:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:14,369 INFO L93 Difference]: Finished difference Result 7053 states and 12688 transitions. [2018-11-07 15:16:14,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:14,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2018-11-07 15:16:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:14,407 INFO L225 Difference]: With dead ends: 7053 [2018-11-07 15:16:14,407 INFO L226 Difference]: Without dead ends: 4917 [2018-11-07 15:16:14,429 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 15:16:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2018-11-07 15:16:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 4877. [2018-11-07 15:16:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2018-11-07 15:16:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 7891 transitions. [2018-11-07 15:16:14,571 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 7891 transitions. Word has length 167 [2018-11-07 15:16:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:14,572 INFO L480 AbstractCegarLoop]: Abstraction has 4877 states and 7891 transitions. [2018-11-07 15:16:14,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:14,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 7891 transitions. [2018-11-07 15:16:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-07 15:16:14,577 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:14,577 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:16:14,577 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:14,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash -964551673, now seen corresponding path program 1 times [2018-11-07 15:16:14,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:14,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:14,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:14,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:14,579 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:14,835 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:16:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:14,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:14,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:14,899 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:14,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:14,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:14,900 INFO L87 Difference]: Start difference. First operand 4877 states and 7891 transitions. Second operand 6 states. [2018-11-07 15:16:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:17,642 INFO L93 Difference]: Finished difference Result 11909 states and 19972 transitions. [2018-11-07 15:16:17,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:17,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 185 [2018-11-07 15:16:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:17,699 INFO L225 Difference]: With dead ends: 11909 [2018-11-07 15:16:17,699 INFO L226 Difference]: Without dead ends: 7038 [2018-11-07 15:16:17,730 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:16:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2018-11-07 15:16:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 6977. [2018-11-07 15:16:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6977 states. [2018-11-07 15:16:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 9942 transitions. [2018-11-07 15:16:17,947 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 9942 transitions. Word has length 185 [2018-11-07 15:16:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:17,947 INFO L480 AbstractCegarLoop]: Abstraction has 6977 states and 9942 transitions. [2018-11-07 15:16:17,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 9942 transitions. [2018-11-07 15:16:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-11-07 15:16:17,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:17,956 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:16:17,957 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:17,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1679600594, now seen corresponding path program 1 times [2018-11-07 15:16:17,957 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:17,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:17,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:17,959 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:18,304 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:16:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:16:18,515 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:18,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:16:18,516 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:16:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:16:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:16:18,517 INFO L87 Difference]: Start difference. First operand 6977 states and 9942 transitions. Second operand 6 states. [2018-11-07 15:16:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:22,364 INFO L93 Difference]: Finished difference Result 17709 states and 25496 transitions. [2018-11-07 15:16:22,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:16:22,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2018-11-07 15:16:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:22,418 INFO L225 Difference]: With dead ends: 17709 [2018-11-07 15:16:22,418 INFO L226 Difference]: Without dead ends: 10738 [2018-11-07 15:16:22,472 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:16:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2018-11-07 15:16:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10702. [2018-11-07 15:16:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10702 states. [2018-11-07 15:16:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 14504 transitions. [2018-11-07 15:16:22,706 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 14504 transitions. Word has length 232 [2018-11-07 15:16:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:22,706 INFO L480 AbstractCegarLoop]: Abstraction has 10702 states and 14504 transitions. [2018-11-07 15:16:22,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:16:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 14504 transitions. [2018-11-07 15:16:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-11-07 15:16:22,712 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:22,713 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:16:22,713 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:22,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1670114349, now seen corresponding path program 1 times [2018-11-07 15:16:22,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:22,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:22,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:22,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:22,715 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-07 15:16:22,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:16:22,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:16:22,995 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:22,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:16:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:16:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:16:22,997 INFO L87 Difference]: Start difference. First operand 10702 states and 14504 transitions. Second operand 4 states. [2018-11-07 15:16:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:16:26,586 INFO L93 Difference]: Finished difference Result 27183 states and 37579 transitions. [2018-11-07 15:16:26,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:16:26,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 269 [2018-11-07 15:16:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:16:26,661 INFO L225 Difference]: With dead ends: 27183 [2018-11-07 15:16:26,662 INFO L226 Difference]: Without dead ends: 16487 [2018-11-07 15:16:26,707 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:16:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16487 states. [2018-11-07 15:16:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16487 to 16487. [2018-11-07 15:16:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16487 states. [2018-11-07 15:16:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16487 states to 16487 states and 21165 transitions. [2018-11-07 15:16:27,084 INFO L78 Accepts]: Start accepts. Automaton has 16487 states and 21165 transitions. Word has length 269 [2018-11-07 15:16:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:16:27,085 INFO L480 AbstractCegarLoop]: Abstraction has 16487 states and 21165 transitions. [2018-11-07 15:16:27,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:16:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 16487 states and 21165 transitions. [2018-11-07 15:16:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2018-11-07 15:16:27,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:16:27,148 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:16:27,148 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:16:27,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:27,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1403080672, now seen corresponding path program 1 times [2018-11-07 15:16:27,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:16:27,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:27,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:16:27,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:16:27,151 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:16:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:16:27,927 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-11-07 15:16:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-11-07 15:16:28,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:16:28,100 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:16:28,101 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 493 with the following transitions: [2018-11-07 15:16:28,104 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [623], [625], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1128], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 15:16:28,163 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:16:28,163 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:16:30,019 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:16:31,583 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:16:31,585 INFO L272 AbstractInterpreter]: Visited 248 different actions 743 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 15:16:31,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:16:31,630 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:16:32,827 INFO L227 lantSequenceWeakener]: Weakened 489 states. On average, predicates are now at 77.75% of their original sizes. [2018-11-07 15:16:32,827 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:16:33,398 INFO L415 sIntCurrentIteration]: We unified 491 AI predicates to 491 [2018-11-07 15:16:33,398 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:16:33,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:16:33,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 15:16:33,400 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:16:33,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 15:16:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 15:16:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:16:33,402 INFO L87 Difference]: Start difference. First operand 16487 states and 21165 transitions. Second operand 10 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown