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/Problem12_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:20:52,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:20:52,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:20:52,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:20:52,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:20:52,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:20:52,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:20:52,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:20:52,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:20:52,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:20:52,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:20:52,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:20:52,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:20:52,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:20:52,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:20:52,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:20:52,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:20:52,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:20:52,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:20:52,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:20:52,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:20:52,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:20:52,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:20:52,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:20:52,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:20:52,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:20:52,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:20:52,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:20:52,385 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 16:20:52,401 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:20:52,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:20:52,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:20:52,401 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:20:52,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:20:52,402 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:20:52,402 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:20:52,403 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:20:52,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:20:52,403 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:20:52,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:20:52,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:20:52,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:20:52,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:20:52,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:20:52,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:20:52,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:20:52,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:20:52,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:20:52,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:20:52,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:20:52,406 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:20:52,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:20:52,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:20:52,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:20:52,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:20:52,407 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:20:52,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:20:52,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:20:52,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:20:52,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:20:52,450 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:20:52,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:20:52,458 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:20:52,460 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:20:52,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-09-09 16:20:52,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfcfddc7f/5347f0992dd143b2bc39718c1c092423/FLAG882a1fc8c [2019-09-09 16:20:53,422 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:20:53,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-09-09 16:20:53,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfcfddc7f/5347f0992dd143b2bc39718c1c092423/FLAG882a1fc8c [2019-09-09 16:20:53,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfcfddc7f/5347f0992dd143b2bc39718c1c092423 [2019-09-09 16:20:53,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:20:53,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:20:53,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:20:53,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:20:53,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:20:53,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:20:53" (1/1) ... [2019-09-09 16:20:53,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d09d1d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:53, skipping insertion in model container [2019-09-09 16:20:53,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:20:53" (1/1) ... [2019-09-09 16:20:53,954 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:20:54,118 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:20:55,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:20:55,598 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:20:56,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:20:56,222 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:20:56,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56 WrapperNode [2019-09-09 16:20:56,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:20:56,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:20:56,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:20:56,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:20:56,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (1/1) ... [2019-09-09 16:20:56,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:20:56,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:20:56,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:20:56,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:20:56,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (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 16:20:56,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:20:56,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:20:56,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:20:56,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:20:56,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:20:56,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:20:56,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:21:01,424 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:21:01,424 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:21:01,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:21:01 BoogieIcfgContainer [2019-09-09 16:21:01,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:21:01,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:21:01,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:21:01,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:21:01,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:20:53" (1/3) ... [2019-09-09 16:21:01,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6455ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:21:01, skipping insertion in model container [2019-09-09 16:21:01,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:20:56" (2/3) ... [2019-09-09 16:21:01,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6455ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:21:01, skipping insertion in model container [2019-09-09 16:21:01,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:21:01" (3/3) ... [2019-09-09 16:21:01,436 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label29.c [2019-09-09 16:21:01,446 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:21:01,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:21:01,472 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:21:01,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:21:01,500 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:21:01,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:21:01,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:21:01,500 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:21:01,501 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:21:01,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:21:01,501 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:21:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:21:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-09 16:21:01,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:01,549 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] [2019-09-09 16:21:01,551 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1364317718, now seen corresponding path program 1 times [2019-09-09 16:21:01,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:01,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:01,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:01,759 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:02,086 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 16:21:02,088 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:21:02,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:21:02,089 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:21:02,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:21:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:21:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:21:02,113 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-09-09 16:21:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:21:10,539 INFO L93 Difference]: Finished difference Result 2397 states and 3778 transitions. [2019-09-09 16:21:10,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:21:10,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-09-09 16:21:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:21:10,591 INFO L225 Difference]: With dead ends: 2397 [2019-09-09 16:21:10,591 INFO L226 Difference]: Without dead ends: 2309 [2019-09-09 16:21:10,594 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 16:21:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-09-09 16:21:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-09-09 16:21:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-09-09 16:21:10,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3659 transitions. [2019-09-09 16:21:10,759 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3659 transitions. Word has length 61 [2019-09-09 16:21:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:21:10,760 INFO L475 AbstractCegarLoop]: Abstraction has 2309 states and 3659 transitions. [2019-09-09 16:21:10,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:21:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3659 transitions. [2019-09-09 16:21:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 16:21:10,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:10,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:10,768 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash 921108326, now seen corresponding path program 1 times [2019-09-09 16:21:10,769 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:10,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:10,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:10,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:10,771 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:21:10,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:21:10,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:21:10,923 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:21:10,926 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:21:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:21:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:21:10,927 INFO L87 Difference]: Start difference. First operand 2309 states and 3659 transitions. Second operand 5 states. [2019-09-09 16:21:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:21:19,162 INFO L93 Difference]: Finished difference Result 4714 states and 6860 transitions. [2019-09-09 16:21:19,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 16:21:19,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 16:21:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:21:19,195 INFO L225 Difference]: With dead ends: 4714 [2019-09-09 16:21:19,195 INFO L226 Difference]: Without dead ends: 4714 [2019-09-09 16:21:19,196 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:21:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2019-09-09 16:21:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4671. [2019-09-09 16:21:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4671 states. [2019-09-09 16:21:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6780 transitions. [2019-09-09 16:21:19,312 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6780 transitions. Word has length 141 [2019-09-09 16:21:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:21:19,313 INFO L475 AbstractCegarLoop]: Abstraction has 4671 states and 6780 transitions. [2019-09-09 16:21:19,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:21:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6780 transitions. [2019-09-09 16:21:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-09 16:21:19,318 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:19,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:19,318 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:19,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2074427823, now seen corresponding path program 1 times [2019-09-09 16:21:19,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:19,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:19,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:19,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:19,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:21:19,576 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:21:19,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:21:19,576 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:21:19,577 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:21:19,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:21:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:21:19,578 INFO L87 Difference]: Start difference. First operand 4671 states and 6780 transitions. Second operand 6 states. [2019-09-09 16:21:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:21:26,894 INFO L93 Difference]: Finished difference Result 9647 states and 13935 transitions. [2019-09-09 16:21:26,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:21:26,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-09-09 16:21:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:21:26,941 INFO L225 Difference]: With dead ends: 9647 [2019-09-09 16:21:26,941 INFO L226 Difference]: Without dead ends: 9647 [2019-09-09 16:21:26,942 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 16:21:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2019-09-09 16:21:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 9523. [2019-09-09 16:21:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9523 states. [2019-09-09 16:21:27,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 13580 transitions. [2019-09-09 16:21:27,187 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 13580 transitions. Word has length 174 [2019-09-09 16:21:27,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:21:27,188 INFO L475 AbstractCegarLoop]: Abstraction has 9523 states and 13580 transitions. [2019-09-09 16:21:27,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:21:27,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 13580 transitions. [2019-09-09 16:21:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-09-09 16:21:27,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:27,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:27,192 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1134260862, now seen corresponding path program 1 times [2019-09-09 16:21:27,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:27,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:27,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:27,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:27,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:21:27,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:21:27,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:21:27,490 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:21:27,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:21:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:21:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:21:27,492 INFO L87 Difference]: Start difference. First operand 9523 states and 13580 transitions. Second operand 6 states. [2019-09-09 16:21:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:21:35,087 INFO L93 Difference]: Finished difference Result 18612 states and 27123 transitions. [2019-09-09 16:21:35,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:21:35,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 185 [2019-09-09 16:21:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:21:35,199 INFO L225 Difference]: With dead ends: 18612 [2019-09-09 16:21:35,200 INFO L226 Difference]: Without dead ends: 18612 [2019-09-09 16:21:35,201 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 16:21:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18612 states. [2019-09-09 16:21:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18612 to 18511. [2019-09-09 16:21:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2019-09-09 16:21:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 26600 transitions. [2019-09-09 16:21:35,717 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 26600 transitions. Word has length 185 [2019-09-09 16:21:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:21:35,719 INFO L475 AbstractCegarLoop]: Abstraction has 18511 states and 26600 transitions. [2019-09-09 16:21:35,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:21:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 26600 transitions. [2019-09-09 16:21:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-09 16:21:35,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:35,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:35,723 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:35,724 INFO L82 PathProgramCache]: Analyzing trace with hash 299938862, now seen corresponding path program 1 times [2019-09-09 16:21:35,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:35,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:35,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:35,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:35,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:21:36,037 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:21:36,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:21:36,037 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:21:36,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:21:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:21:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:21:36,041 INFO L87 Difference]: Start difference. First operand 18511 states and 26600 transitions. Second operand 4 states. [2019-09-09 16:21:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:21:43,352 INFO L93 Difference]: Finished difference Result 27917 states and 35885 transitions. [2019-09-09 16:21:43,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:21:43,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2019-09-09 16:21:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:21:43,472 INFO L225 Difference]: With dead ends: 27917 [2019-09-09 16:21:43,472 INFO L226 Difference]: Without dead ends: 27917 [2019-09-09 16:21:43,472 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 16:21:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27917 states. [2019-09-09 16:21:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27917 to 27915. [2019-09-09 16:21:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27915 states. [2019-09-09 16:21:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27915 states to 27915 states and 35883 transitions. [2019-09-09 16:21:44,193 INFO L78 Accepts]: Start accepts. Automaton has 27915 states and 35883 transitions. Word has length 209 [2019-09-09 16:21:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:21:44,194 INFO L475 AbstractCegarLoop]: Abstraction has 27915 states and 35883 transitions. [2019-09-09 16:21:44,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:21:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 27915 states and 35883 transitions. [2019-09-09 16:21:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-09 16:21:44,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:21:44,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:44,198 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:21:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:21:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1953631415, now seen corresponding path program 1 times [2019-09-09 16:21:44,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:21:44,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:44,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:21:44,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:21:44,201 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:21:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:21:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 16:21:44,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:21:44,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:21:44,395 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2019-09-09 16:21:44,398 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2263], [2265], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2680], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:21:44,497 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:21:44,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:22:18,563 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 16:22:49,717 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:22:49,720 INFO L272 AbstractInterpreter]: Visited 156 different actions 307 times. Merged at 4 different actions 5 times. Never widened. Performed 712 root evaluator evaluations with a maximum evaluation depth of 16. Performed 712 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 16:22:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:22:49,725 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:23:14,683 INFO L227 lantSequenceWeakener]: Weakened 207 states. On average, predicates are now at 75.77% of their original sizes. [2019-09-09 16:23:14,684 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:23:14,852 INFO L420 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2019-09-09 16:23:14,853 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:23:14,854 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:23:14,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2019-09-09 16:23:14,854 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:23:14,855 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-09 16:23:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-09 16:23:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-09-09 16:23:14,858 INFO L87 Difference]: Start difference. First operand 27915 states and 35883 transitions. Second operand 14 states.