java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:27:18,379 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:27:18,381 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:27:18,394 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:27:18,394 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:27:18,395 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:27:18,396 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:27:18,398 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:27:18,400 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:27:18,400 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:27:18,401 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:27:18,402 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:27:18,402 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:27:18,403 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:27:18,404 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:27:18,405 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:27:18,406 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:27:18,408 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:27:18,409 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:27:18,411 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:27:18,412 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:27:18,413 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:27:18,419 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:27:18,431 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:27:18,435 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:27:18,436 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:27:18,436 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:27:18,437 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:27:18,467 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:27:18,467 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:27:18,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:27:18,471 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:27:18,471 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:27:18,471 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:27:18,472 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:27:18,473 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:27:18,473 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:27:18,474 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:27:18,477 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:27:18,477 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:27:18,477 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:27:18,477 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:27:18,477 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:27:18,478 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:27:18,478 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:27:18,478 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:27:18,478 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:27:18,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:27:18,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:27:18,481 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:27:18,481 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:27:18,481 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:27:18,481 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:27:18,482 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:27:18,482 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:27:18,482 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:27:18,482 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:27:18,554 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:27:18,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:27:18,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:27:18,575 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:27:18,576 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:27:18,576 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c [2018-10-24 18:27:18,641 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/87ac9c45f/bafc5ffa12dc4d43b6ad508fbe26815a/FLAG996c5496d [2018-10-24 18:27:19,374 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:27:19,375 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label51_false-unreach-call.c [2018-10-24 18:27:19,415 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/87ac9c45f/bafc5ffa12dc4d43b6ad508fbe26815a/FLAG996c5496d [2018-10-24 18:27:19,437 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/87ac9c45f/bafc5ffa12dc4d43b6ad508fbe26815a [2018-10-24 18:27:19,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:27:19,452 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:27:19,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:27:19,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:27:19,458 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:27:19,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:27:19" (1/1) ... [2018-10-24 18:27:19,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3aa307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:19, skipping insertion in model container [2018-10-24 18:27:19,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:27:19" (1/1) ... [2018-10-24 18:27:19,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:27:19,647 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:27:21,148 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:27:21,153 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:27:21,925 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:27:21,962 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:27:21,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21 WrapperNode [2018-10-24 18:27:21,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:27:21,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:27:21,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:27:21,964 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:27:21,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:27:22,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:27:22,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:27:22,628 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:27:22,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... [2018-10-24 18:27:22,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:27:22,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:27:22,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:27:22,932 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:27:22,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 18:27:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:27:23,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:27:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 18:27:23,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 18:27:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 18:27:23,002 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 18:27:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:27:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:27:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:27:23,003 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:27:23,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:27:23,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:27:23,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:27:23,005 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:27:36,538 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:27:36,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:27:36 BoogieIcfgContainer [2018-10-24 18:27:36,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:27:36,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:27:36,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:27:36,544 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:27:36,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:27:19" (1/3) ... [2018-10-24 18:27:36,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dad61ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:27:36, skipping insertion in model container [2018-10-24 18:27:36,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:27:21" (2/3) ... [2018-10-24 18:27:36,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dad61ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:27:36, skipping insertion in model container [2018-10-24 18:27:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:27:36" (3/3) ... [2018-10-24 18:27:36,548 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label51_false-unreach-call.c [2018-10-24 18:27:36,558 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:27:36,567 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:27:36,580 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:27:36,625 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:27:36,625 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:27:36,626 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:27:36,626 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:27:36,626 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:27:36,626 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:27:36,626 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:27:36,626 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:27:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-24 18:27:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 18:27:36,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:27:36,678 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] [2018-10-24 18:27:36,681 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:27:36,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:27:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash -81716397, now seen corresponding path program 1 times [2018-10-24 18:27:36,690 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:27:36,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:27:36,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:27:36,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:27:36,744 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:27:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:27:37,172 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 18:27:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:27:37,198 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:27:37,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:27:37,199 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:27:37,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:27:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:27:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:27:37,234 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-10-24 18:27:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:27:52,364 INFO L93 Difference]: Finished difference Result 4065 states and 7606 transitions. [2018-10-24 18:27:52,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:27:52,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2018-10-24 18:27:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:27:52,413 INFO L225 Difference]: With dead ends: 4065 [2018-10-24 18:27:52,414 INFO L226 Difference]: Without dead ends: 2939 [2018-10-24 18:27:52,429 INFO L605 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 [2018-10-24 18:27:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2018-10-24 18:27:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 1972. [2018-10-24 18:27:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2018-10-24 18:27:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 3594 transitions. [2018-10-24 18:27:52,624 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 3594 transitions. Word has length 31 [2018-10-24 18:27:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:27:52,625 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 3594 transitions. [2018-10-24 18:27:52,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:27:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 3594 transitions. [2018-10-24 18:27:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-24 18:27:52,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:27:52,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:27:52,635 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:27:52,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:27:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2132538579, now seen corresponding path program 1 times [2018-10-24 18:27:52,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:27:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:27:52,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:27:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:27:52,638 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:27:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:27:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:27:53,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:27:53,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:27:53,175 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:27:53,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:27:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:27:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:27:53,178 INFO L87 Difference]: Start difference. First operand 1972 states and 3594 transitions. Second operand 6 states. [2018-10-24 18:28:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:28:09,526 INFO L93 Difference]: Finished difference Result 7229 states and 13602 transitions. [2018-10-24 18:28:09,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:28:09,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2018-10-24 18:28:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:28:09,559 INFO L225 Difference]: With dead ends: 7229 [2018-10-24 18:28:09,559 INFO L226 Difference]: Without dead ends: 5263 [2018-10-24 18:28:09,572 INFO L605 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 [2018-10-24 18:28:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2018-10-24 18:28:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5234. [2018-10-24 18:28:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2018-10-24 18:28:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8445 transitions. [2018-10-24 18:28:09,883 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8445 transitions. Word has length 104 [2018-10-24 18:28:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:28:09,883 INFO L481 AbstractCegarLoop]: Abstraction has 5234 states and 8445 transitions. [2018-10-24 18:28:09,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:28:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8445 transitions. [2018-10-24 18:28:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-24 18:28:09,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:28:09,898 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:28:09,898 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:28:09,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:28:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1105327350, now seen corresponding path program 1 times [2018-10-24 18:28:09,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:28:09,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:28:09,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:28:09,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:28:09,903 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:28:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:28:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:28:10,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:28:10,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 18:28:10,172 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:28:10,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 18:28:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 18:28:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 18:28:10,173 INFO L87 Difference]: Start difference. First operand 5234 states and 8445 transitions. Second operand 5 states. [2018-10-24 18:28:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:28:28,271 INFO L93 Difference]: Finished difference Result 15741 states and 26186 transitions. [2018-10-24 18:28:28,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 18:28:28,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-10-24 18:28:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:28:28,333 INFO L225 Difference]: With dead ends: 15741 [2018-10-24 18:28:28,333 INFO L226 Difference]: Without dead ends: 10513 [2018-10-24 18:28:28,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:28:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10513 states. [2018-10-24 18:28:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10513 to 10309. [2018-10-24 18:28:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10309 states. [2018-10-24 18:28:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 15531 transitions. [2018-10-24 18:28:28,669 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 15531 transitions. Word has length 133 [2018-10-24 18:28:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:28:28,670 INFO L481 AbstractCegarLoop]: Abstraction has 10309 states and 15531 transitions. [2018-10-24 18:28:28,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 18:28:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 15531 transitions. [2018-10-24 18:28:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 18:28:28,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:28:28,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:28:28,674 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:28:28,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:28:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1620702082, now seen corresponding path program 1 times [2018-10-24 18:28:28,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:28:28,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:28:28,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:28:28,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:28:28,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:28:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:28:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:28:29,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:28:29,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 18:28:29,063 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:28:29,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 18:28:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 18:28:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 18:28:29,064 INFO L87 Difference]: Start difference. First operand 10309 states and 15531 transitions. Second operand 5 states. [2018-10-24 18:29:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:29:03,717 INFO L93 Difference]: Finished difference Result 32117 states and 50259 transitions. [2018-10-24 18:29:03,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 18:29:03,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2018-10-24 18:29:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:29:03,831 INFO L225 Difference]: With dead ends: 32117 [2018-10-24 18:29:03,831 INFO L226 Difference]: Without dead ends: 21814 [2018-10-24 18:29:03,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:29:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21814 states. [2018-10-24 18:29:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21814 to 21590. [2018-10-24 18:29:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21590 states. [2018-10-24 18:29:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21590 states to 21590 states and 31809 transitions. [2018-10-24 18:29:04,408 INFO L78 Accepts]: Start accepts. Automaton has 21590 states and 31809 transitions. Word has length 137 [2018-10-24 18:29:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:29:04,409 INFO L481 AbstractCegarLoop]: Abstraction has 21590 states and 31809 transitions. [2018-10-24 18:29:04,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 18:29:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 21590 states and 31809 transitions. [2018-10-24 18:29:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 18:29:04,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:29:04,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:29:04,413 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:29:04,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:29:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 819768018, now seen corresponding path program 1 times [2018-10-24 18:29:04,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:29:04,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:29:04,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:29:04,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:29:04,416 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:29:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:29:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:29:04,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:29:04,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:29:04,654 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:29:04,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:29:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:29:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:29:04,656 INFO L87 Difference]: Start difference. First operand 21590 states and 31809 transitions. Second operand 4 states. [2018-10-24 18:29:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:29:16,896 INFO L93 Difference]: Finished difference Result 82882 states and 132360 transitions. [2018-10-24 18:29:16,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:29:16,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2018-10-24 18:29:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:29:17,201 INFO L225 Difference]: With dead ends: 82882 [2018-10-24 18:29:17,202 INFO L226 Difference]: Without dead ends: 61298 [2018-10-24 18:29:17,338 INFO L605 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 [2018-10-24 18:29:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61298 states. [2018-10-24 18:29:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61298 to 61227. [2018-10-24 18:29:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61227 states. [2018-10-24 18:29:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61227 states to 61227 states and 89048 transitions. [2018-10-24 18:29:18,838 INFO L78 Accepts]: Start accepts. Automaton has 61227 states and 89048 transitions. Word has length 147 [2018-10-24 18:29:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:29:18,839 INFO L481 AbstractCegarLoop]: Abstraction has 61227 states and 89048 transitions. [2018-10-24 18:29:18,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:29:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 61227 states and 89048 transitions. [2018-10-24 18:29:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 18:29:18,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:29:18,861 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 18:29:18,861 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:29:18,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:29:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash -643006826, now seen corresponding path program 1 times [2018-10-24 18:29:18,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:29:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:29:18,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:29:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:29:18,863 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:29:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:29:19,209 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:29:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 48 proven. 102 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 18:29:19,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:29:19,294 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:29:19,296 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-10-24 18:29:19,298 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2775], [2777], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3289], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3336], [3341], [3343], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-24 18:29:19,378 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:29:19,378 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:29:25,848 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:29:25,850 INFO L272 AbstractInterpreter]: Visited 122 different actions 122 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 18:29:25,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:29:25,891 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:29:30,512 INFO L232 lantSequenceWeakener]: Weakened 234 states. On average, predicates are now at 71.28% of their original sizes. [2018-10-24 18:29:30,512 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:29:32,297 INFO L413 sIntCurrentIteration]: We have 256 unified AI predicates [2018-10-24 18:29:32,298 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:29:32,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:29:32,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-10-24 18:29:32,299 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:29:32,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 18:29:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 18:29:32,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-24 18:29:32,300 INFO L87 Difference]: Start difference. First operand 61227 states and 89048 transitions. Second operand 11 states. [2018-10-24 18:30:14,996 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown