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/Problem15_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:28:10,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:28:10,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:28:10,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:28:11,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:28:11,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:28:11,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:28:11,040 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 19:28:11,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:28:11,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:28:11,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:28:11,056 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:28:11,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:28:11,057 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:28:11,057 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:28:11,057 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:28:11,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:28:11,057 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:28:11,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:28:11,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:28:11,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:28:11,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:28:11,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:28:11,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:28:11,060 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:28:11,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:28:11,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:28:11,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:28:11,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:28:11,061 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:28:11,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:28:11,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:28:11,062 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:28:11,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:28:11,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:28:11,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:28:11,106 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:28:11,106 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:28:11,107 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-09-09 19:28:11,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369e10fe9/ea640541451647fe9cdaac2ef70db2ac/FLAG88d76016a [2019-09-09 19:28:11,796 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:28:11,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-09-09 19:28:11,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369e10fe9/ea640541451647fe9cdaac2ef70db2ac/FLAG88d76016a [2019-09-09 19:28:11,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369e10fe9/ea640541451647fe9cdaac2ef70db2ac [2019-09-09 19:28:11,992 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:28:11,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:28:11,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:28:11,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:28:11,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:28:11,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:28:11" (1/1) ... [2019-09-09 19:28:12,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6801b0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:12, skipping insertion in model container [2019-09-09 19:28:12,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:28:11" (1/1) ... [2019-09-09 19:28:12,009 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:28:12,087 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:28:12,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:28:12,932 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:28:13,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:28:13,354 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:28:13,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13 WrapperNode [2019-09-09 19:28:13,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:28:13,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:28:13,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:28:13,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:28:13,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (1/1) ... [2019-09-09 19:28:13,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:28:13,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:28:13,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:28:13,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:28:13,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (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 19:28:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:28:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:28:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:28:13,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:28:13,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:28:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:28:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:28:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:28:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:28:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:28:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:28:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:28:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:28:17,260 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:28:17,261 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:28:17,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:28:17 BoogieIcfgContainer [2019-09-09 19:28:17,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:28:17,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:28:17,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:28:17,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:28:17,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:28:11" (1/3) ... [2019-09-09 19:28:17,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b8417b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:28:17, skipping insertion in model container [2019-09-09 19:28:17,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:28:13" (2/3) ... [2019-09-09 19:28:17,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b8417b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:28:17, skipping insertion in model container [2019-09-09 19:28:17,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:28:17" (3/3) ... [2019-09-09 19:28:17,284 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2019-09-09 19:28:17,297 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:28:17,309 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:28:17,327 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:28:17,359 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:28:17,360 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:28:17,360 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:28:17,360 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:28:17,360 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:28:17,361 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:28:17,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:28:17,361 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:28:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:28:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-09 19:28:17,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:28:17,426 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] [2019-09-09 19:28:17,428 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:28:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1323114568, now seen corresponding path program 1 times [2019-09-09 19:28:17,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:28:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:17,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:28:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:17,482 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:28:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:28:17,837 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 19:28:17,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:28:17,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:28:17,840 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:28:17,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:28:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:28:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:28:17,864 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:28:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:28:22,171 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-09-09 19:28:22,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:28:22,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-09-09 19:28:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:28:22,207 INFO L225 Difference]: With dead ends: 1066 [2019-09-09 19:28:22,207 INFO L226 Difference]: Without dead ends: 993 [2019-09-09 19:28:22,209 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 19:28:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-09-09 19:28:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-09-09 19:28:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:28:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-09-09 19:28:22,307 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 72 [2019-09-09 19:28:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:28:22,308 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-09-09 19:28:22,308 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:28:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-09-09 19:28:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 19:28:22,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:28:22,315 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:28:22,316 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:28:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash 380539372, now seen corresponding path program 1 times [2019-09-09 19:28:22,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:28:22,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:22,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:28:22,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:22,318 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:28:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:28:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:28:22,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:28:22,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:28:22,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:28:22,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:28:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:28:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:28:22,513 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-09-09 19:28:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:28:26,125 INFO L93 Difference]: Finished difference Result 1928 states and 2597 transitions. [2019-09-09 19:28:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:28:26,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-09-09 19:28:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:28:26,135 INFO L225 Difference]: With dead ends: 1928 [2019-09-09 19:28:26,136 INFO L226 Difference]: Without dead ends: 1928 [2019-09-09 19:28:26,137 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 19:28:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2019-09-09 19:28:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1617. [2019-09-09 19:28:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1617 states. [2019-09-09 19:28:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2218 transitions. [2019-09-09 19:28:26,189 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2218 transitions. Word has length 141 [2019-09-09 19:28:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:28:26,190 INFO L475 AbstractCegarLoop]: Abstraction has 1617 states and 2218 transitions. [2019-09-09 19:28:26,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:28:26,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2218 transitions. [2019-09-09 19:28:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-09-09 19:28:26,199 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:28:26,200 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:28:26,200 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:28:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1715878782, now seen corresponding path program 1 times [2019-09-09 19:28:26,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:28:26,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:26,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:28:26,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:28:26,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:28:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:28:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 133 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:28:26,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:28:26,596 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:28:26,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 291 with the following transitions: [2019-09-09 19:28:26,602 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [529], [537], [545], [553], [557], [559], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [816], [819], [823], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:28:26,669 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:28:26,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:28:29,844 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:28:34,427 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:28:34,429 INFO L272 AbstractInterpreter]: Visited 129 different actions 253 times. Merged at 4 different actions 5 times. Never widened. Performed 530 root evaluator evaluations with a maximum evaluation depth of 14. Performed 530 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:28:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:28:34,433 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:28:36,156 INFO L227 lantSequenceWeakener]: Weakened 285 states. On average, predicates are now at 78.13% of their original sizes. [2019-09-09 19:28:36,157 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:28:36,264 INFO L420 sIntCurrentIteration]: We unified 289 AI predicates to 289 [2019-09-09 19:28:36,264 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:28:36,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:28:36,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:28:36,266 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:28:36,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:28:36,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:28:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:28:36,268 INFO L87 Difference]: Start difference. First operand 1617 states and 2218 transitions. Second operand 12 states.