java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:19:36,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:19:36,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:19:36,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 21:19:36,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 21:19:36,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 21:19:36,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 21:19:36,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 21:19:36,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 21:19:36,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 21:19:36,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 21:19:36,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 21:19:36,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:19:36,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:19:36,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:19:36,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:19:36,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:19:36,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:19:36,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:19:36,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:19:36,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:19:36,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:19:36,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:19:36,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:19:36,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 21:19:36,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 21:19:36,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 21:19:36,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 21:19:36,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 21:19:36,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 21:19:36,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 21:19:36,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 21:19:36,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 21:19:36,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 21:19:36,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 21:19:36,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 21:19:36,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 21:19:36,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 21:19:36,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:19:36,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:19:36,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:19:36,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 21:19:36,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:19:36,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:19:36,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:19:36,434 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:19:36,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:19:36,435 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:19:36,435 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:19:36,435 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:19:36,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:19:36,435 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:19:36,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:19:36,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:19:36,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:19:36,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:19:36,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:19:36,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:19:36,438 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:19:36,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:19:36,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:19:36,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:19:36,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:19:36,439 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:19:36,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:19:36,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:19:36,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:19:36,468 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:19:36,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:19:36,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:19:36,485 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:19:36,486 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:19:36,487 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label29.c [2019-09-09 21:19:36,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7caddc76b/96844665cdb2422cb2ff27cfdd34b0a7/FLAG31755c7af [2019-09-09 21:19:37,318 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:19:37,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label29.c [2019-09-09 21:19:37,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7caddc76b/96844665cdb2422cb2ff27cfdd34b0a7/FLAG31755c7af [2019-09-09 21:19:37,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7caddc76b/96844665cdb2422cb2ff27cfdd34b0a7 [2019-09-09 21:19:37,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:19:37,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:19:37,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:19:37,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:19:37,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:19:37,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:19:37" (1/1) ... [2019-09-09 21:19:37,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4db4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:37, skipping insertion in model container [2019-09-09 21:19:37,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:19:37" (1/1) ... [2019-09-09 21:19:37,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:19:37,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:19:38,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:19:38,820 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:19:39,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:19:39,273 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:19:39,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39 WrapperNode [2019-09-09 21:19:39,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:19:39,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:19:39,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:19:39,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:19:39,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (1/1) ... [2019-09-09 21:19:39,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:19:39,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:19:39,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:19:39,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:19:39,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (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 [2019-09-09 21:19:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:19:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:19:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:19:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:19:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:19:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:19:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:19:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:19:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:19:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:19:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:19:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:19:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:19:43,550 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:19:43,551 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:19:43,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:19:43 BoogieIcfgContainer [2019-09-09 21:19:43,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:19:43,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:19:43,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:19:43,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:19:43,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:19:37" (1/3) ... [2019-09-09 21:19:43,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:19:43, skipping insertion in model container [2019-09-09 21:19:43,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:19:39" (2/3) ... [2019-09-09 21:19:43,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7d875b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:19:43, skipping insertion in model container [2019-09-09 21:19:43,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:19:43" (3/3) ... [2019-09-09 21:19:43,570 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label29.c [2019-09-09 21:19:43,583 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:19:43,594 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:19:43,615 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:19:43,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:19:43,646 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:19:43,646 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:19:43,647 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:19:43,647 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:19:43,648 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:19:43,648 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:19:43,648 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:19:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:19:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-09 21:19:43,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:19:43,710 INFO L399 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, 1, 1, 1] [2019-09-09 21:19:43,712 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:19:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:19:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash 216258473, now seen corresponding path program 1 times [2019-09-09 21:19:43,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:19:43,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:43,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:19:43,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:43,774 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:19:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:19:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:19:44,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:19:44,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:19:44,141 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:19:44,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:19:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:19:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:19:44,170 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:19:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:19:50,188 INFO L93 Difference]: Finished difference Result 1565 states and 2620 transitions. [2019-09-09 21:19:50,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:19:50,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-09-09 21:19:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:19:50,226 INFO L225 Difference]: With dead ends: 1565 [2019-09-09 21:19:50,227 INFO L226 Difference]: Without dead ends: 1478 [2019-09-09 21:19:50,228 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:19:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-09-09 21:19:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2019-09-09 21:19:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-09-09 21:19:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1697 transitions. [2019-09-09 21:19:50,339 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1697 transitions. Word has length 71 [2019-09-09 21:19:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:19:50,340 INFO L475 AbstractCegarLoop]: Abstraction has 1006 states and 1697 transitions. [2019-09-09 21:19:50,340 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:19:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1697 transitions. [2019-09-09 21:19:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-09 21:19:50,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:19:50,347 INFO L399 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:19:50,347 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:19:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:19:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1582760359, now seen corresponding path program 1 times [2019-09-09 21:19:50,348 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:19:50,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:50,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:19:50,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:50,350 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:19:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:19:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:19:50,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:19:50,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:19:50,658 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:19:50,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:19:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:19:50,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:19:50,661 INFO L87 Difference]: Start difference. First operand 1006 states and 1697 transitions. Second operand 6 states. [2019-09-09 21:19:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:19:55,193 INFO L93 Difference]: Finished difference Result 1931 states and 2979 transitions. [2019-09-09 21:19:55,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:19:55,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2019-09-09 21:19:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:19:55,213 INFO L225 Difference]: With dead ends: 1931 [2019-09-09 21:19:55,213 INFO L226 Difference]: Without dead ends: 1931 [2019-09-09 21:19:55,214 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 21:19:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2019-09-09 21:19:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1911. [2019-09-09 21:19:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1911 states. [2019-09-09 21:19:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2935 transitions. [2019-09-09 21:19:55,289 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2935 transitions. Word has length 146 [2019-09-09 21:19:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:19:55,291 INFO L475 AbstractCegarLoop]: Abstraction has 1911 states and 2935 transitions. [2019-09-09 21:19:55,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:19:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2935 transitions. [2019-09-09 21:19:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-09 21:19:55,306 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:19:55,306 INFO L399 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, 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] [2019-09-09 21:19:55,306 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:19:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:19:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash 400970031, now seen corresponding path program 1 times [2019-09-09 21:19:55,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:19:55,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:55,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:19:55,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:55,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:19:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:19:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:19:55,460 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:19:55,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:19:55,460 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:19:55,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:19:55,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:19:55,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:19:55,462 INFO L87 Difference]: Start difference. First operand 1911 states and 2935 transitions. Second operand 6 states. [2019-09-09 21:19:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:19:59,511 INFO L93 Difference]: Finished difference Result 2841 states and 3676 transitions. [2019-09-09 21:19:59,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:19:59,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-09-09 21:19:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:19:59,528 INFO L225 Difference]: With dead ends: 2841 [2019-09-09 21:19:59,528 INFO L226 Difference]: Without dead ends: 2841 [2019-09-09 21:19:59,529 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 21:19:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-09-09 21:19:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2819. [2019-09-09 21:19:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:19:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3606 transitions. [2019-09-09 21:19:59,598 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3606 transitions. Word has length 150 [2019-09-09 21:19:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:19:59,598 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3606 transitions. [2019-09-09 21:19:59,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:19:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3606 transitions. [2019-09-09 21:19:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-09-09 21:19:59,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:19:59,601 INFO L399 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, 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] [2019-09-09 21:19:59,602 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:19:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:19:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -395438606, now seen corresponding path program 1 times [2019-09-09 21:19:59,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:19:59,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:59,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:19:59,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:19:59,604 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:19:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:19:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:19:59,768 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:19:59,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:19:59,768 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:19:59,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:19:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:19:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:19:59,770 INFO L87 Difference]: Start difference. First operand 2819 states and 3606 transitions. Second operand 4 states. [2019-09-09 21:20:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:20:03,893 INFO L93 Difference]: Finished difference Result 2819 states and 3569 transitions. [2019-09-09 21:20:03,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:20:03,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2019-09-09 21:20:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:20:03,927 INFO L225 Difference]: With dead ends: 2819 [2019-09-09 21:20:03,928 INFO L226 Difference]: Without dead ends: 2819 [2019-09-09 21:20:03,928 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:20:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2019-09-09 21:20:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2019-09-09 21:20:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:20:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3569 transitions. [2019-09-09 21:20:04,006 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3569 transitions. Word has length 180 [2019-09-09 21:20:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:20:04,008 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3569 transitions. [2019-09-09 21:20:04,008 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:20:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3569 transitions. [2019-09-09 21:20:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 21:20:04,012 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:20:04,012 INFO L399 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, 3, 3, 3, 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] [2019-09-09 21:20:04,012 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:20:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash -44901423, now seen corresponding path program 1 times [2019-09-09 21:20:04,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:20:04,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:04,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:20:04,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:04,015 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:20:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:20:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-09 21:20:04,227 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:20:04,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:20:04,227 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:20:04,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:20:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:20:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:20:04,229 INFO L87 Difference]: Start difference. First operand 2819 states and 3569 transitions. Second operand 4 states. [2019-09-09 21:20:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:20:08,821 INFO L93 Difference]: Finished difference Result 8104 states and 9650 transitions. [2019-09-09 21:20:08,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:20:08,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2019-09-09 21:20:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:20:08,852 INFO L225 Difference]: With dead ends: 8104 [2019-09-09 21:20:08,852 INFO L226 Difference]: Without dead ends: 8104 [2019-09-09 21:20:08,853 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:20:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8104 states. [2019-09-09 21:20:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8104 to 7228. [2019-09-09 21:20:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7228 states. [2019-09-09 21:20:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 8718 transitions. [2019-09-09 21:20:09,021 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 8718 transitions. Word has length 233 [2019-09-09 21:20:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:20:09,022 INFO L475 AbstractCegarLoop]: Abstraction has 7228 states and 8718 transitions. [2019-09-09 21:20:09,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:20:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 8718 transitions. [2019-09-09 21:20:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-09-09 21:20:09,029 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:20:09,030 INFO L399 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, 3, 3, 3, 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] [2019-09-09 21:20:09,030 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:20:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:09,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1595802818, now seen corresponding path program 1 times [2019-09-09 21:20:09,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:20:09,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:09,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:20:09,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:20:09,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:20:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:20:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:20:09,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:20:09,328 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:20:09,330 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2019-09-09 21:20:09,333 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1142], [1150], [1158], [1166], [1174], [1182], [1186], [1188], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:20:09,409 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:20:09,409 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:20:16,810 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:20:16,812 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 15. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 21:20:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:20:16,817 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:20:23,819 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 76.04% of their original sizes. [2019-09-09 21:20:23,820 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:20:23,917 INFO L420 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2019-09-09 21:20:23,917 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:20:23,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:20:23,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:20:23,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:20:23,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:20:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:20:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:20:23,920 INFO L87 Difference]: Start difference. First operand 7228 states and 8718 transitions. Second operand 11 states. [2019-09-09 21:20:35,612 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.