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/Problem03_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 07:48:41,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 07:48:41,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 07:48:41,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 07:48:41,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 07:48:41,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 07:48:41,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 07:48:41,323 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 07:48:41,337 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 07:48:41,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 07:48:41,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 07:48:41,338 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 07:48:41,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 07:48:41,338 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 07:48:41,339 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 07:48:41,339 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 07:48:41,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 07:48:41,339 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 07:48:41,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 07:48:41,340 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 07:48:41,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 07:48:41,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 07:48:41,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 07:48:41,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 07:48:41,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 07:48:41,341 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 07:48:41,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 07:48:41,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 07:48:41,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 07:48:41,342 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 07:48:41,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 07:48:41,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 07:48:41,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 07:48:41,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 07:48:41,343 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 07:48:41,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 07:48:41,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 07:48:41,344 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 07:48:41,371 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 07:48:41,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 07:48:41,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 07:48:41,389 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 07:48:41,389 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 07:48:41,390 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-09-09 07:48:41,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c88394d3/ed0a60e11dfa4f038fcfcc436233ae75/FLAG0388d99e1 [2019-09-09 07:48:42,080 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 07:48:42,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-09-09 07:48:42,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c88394d3/ed0a60e11dfa4f038fcfcc436233ae75/FLAG0388d99e1 [2019-09-09 07:48:42,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c88394d3/ed0a60e11dfa4f038fcfcc436233ae75 [2019-09-09 07:48:42,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 07:48:42,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 07:48:42,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 07:48:42,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 07:48:42,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 07:48:42,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:48:42" (1/1) ... [2019-09-09 07:48:42,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d455d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:42, skipping insertion in model container [2019-09-09 07:48:42,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:48:42" (1/1) ... [2019-09-09 07:48:42,297 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 07:48:42,372 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 07:48:43,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:48:43,098 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 07:48:43,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 07:48:43,526 INFO L192 MainTranslator]: Completed translation [2019-09-09 07:48:43,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43 WrapperNode [2019-09-09 07:48:43,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 07:48:43,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 07:48:43,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 07:48:43,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 07:48:43,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (1/1) ... [2019-09-09 07:48:43,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 07:48:43,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 07:48:43,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 07:48:43,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 07:48:43,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (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 07:48:43,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 07:48:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 07:48:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 07:48:43,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 07:48:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 07:48:43,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 07:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 07:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 07:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 07:48:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 07:48:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 07:48:45,904 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 07:48:45,905 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 07:48:45,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:48:45 BoogieIcfgContainer [2019-09-09 07:48:45,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 07:48:45,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 07:48:45,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 07:48:45,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 07:48:45,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:48:42" (1/3) ... [2019-09-09 07:48:45,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b04a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:48:45, skipping insertion in model container [2019-09-09 07:48:45,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:48:43" (2/3) ... [2019-09-09 07:48:45,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b04a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:48:45, skipping insertion in model container [2019-09-09 07:48:45,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:48:45" (3/3) ... [2019-09-09 07:48:45,915 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-09-09 07:48:45,925 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 07:48:45,933 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 07:48:45,950 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 07:48:45,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 07:48:45,977 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 07:48:45,977 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 07:48:45,977 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 07:48:45,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 07:48:45,978 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 07:48:45,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 07:48:45,978 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 07:48:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 07:48:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-09 07:48:46,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:48:46,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:46,024 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:48:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:48:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash -986634456, now seen corresponding path program 1 times [2019-09-09 07:48:46,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:48:46,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:46,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:48:46,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:46,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:48:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:48:46,747 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 07:48:46,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:48:46,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 07:48:46,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:48:46,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 07:48:46,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 07:48:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:48:46,774 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-09-09 07:48:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:48:48,125 INFO L93 Difference]: Finished difference Result 547 states and 875 transitions. [2019-09-09 07:48:48,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 07:48:48,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-09-09 07:48:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:48:48,146 INFO L225 Difference]: With dead ends: 547 [2019-09-09 07:48:48,147 INFO L226 Difference]: Without dead ends: 479 [2019-09-09 07:48:48,148 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 07:48:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-09-09 07:48:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-09-09 07:48:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-09-09 07:48:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-09-09 07:48:48,229 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 153 [2019-09-09 07:48:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:48:48,230 INFO L475 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-09-09 07:48:48,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 07:48:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-09-09 07:48:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-09 07:48:48,237 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:48:48,237 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:48,238 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:48:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:48:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163947, now seen corresponding path program 1 times [2019-09-09 07:48:48,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:48:48,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:48:48,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:48,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:48:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:48:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:48:48,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:48:48,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 07:48:48,456 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:48:48,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 07:48:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 07:48:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 07:48:48,461 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-09-09 07:48:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:48:50,223 INFO L93 Difference]: Finished difference Result 941 states and 1549 transitions. [2019-09-09 07:48:50,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 07:48:50,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-09-09 07:48:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:48:50,237 INFO L225 Difference]: With dead ends: 941 [2019-09-09 07:48:50,238 INFO L226 Difference]: Without dead ends: 941 [2019-09-09 07:48:50,238 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 07:48:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-09-09 07:48:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-09-09 07:48:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-09-09 07:48:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-09-09 07:48:50,321 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 162 [2019-09-09 07:48:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:48:50,322 INFO L475 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-09-09 07:48:50,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 07:48:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-09-09 07:48:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-09 07:48:50,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:48:50,330 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:50,330 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:48:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:48:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash 198136689, now seen corresponding path program 1 times [2019-09-09 07:48:50,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:48:50,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:50,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:48:50,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:50,332 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:48:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:48:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:48:50,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 07:48:50,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 07:48:50,473 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 07:48:50,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 07:48:50,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 07:48:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 07:48:50,475 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-09-09 07:48:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 07:48:51,911 INFO L93 Difference]: Finished difference Result 1796 states and 2836 transitions. [2019-09-09 07:48:51,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 07:48:51,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-09-09 07:48:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 07:48:51,923 INFO L225 Difference]: With dead ends: 1796 [2019-09-09 07:48:51,923 INFO L226 Difference]: Without dead ends: 1796 [2019-09-09 07:48:51,923 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 07:48:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-09-09 07:48:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-09-09 07:48:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-09-09 07:48:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2722 transitions. [2019-09-09 07:48:51,982 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2722 transitions. Word has length 163 [2019-09-09 07:48:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 07:48:51,983 INFO L475 AbstractCegarLoop]: Abstraction has 1763 states and 2722 transitions. [2019-09-09 07:48:51,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 07:48:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2722 transitions. [2019-09-09 07:48:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-09 07:48:51,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 07:48:51,990 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:48:51,991 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 07:48:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:48:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1802668228, now seen corresponding path program 1 times [2019-09-09 07:48:51,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 07:48:51,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:51,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 07:48:51,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 07:48:51,993 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 07:48:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 07:48:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 07:48:52,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 07:48:52,293 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 07:48:52,295 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 166 with the following transitions: [2019-09-09 07:48:52,298 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [693], [695], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 07:48:52,397 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 07:48:52,398 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)