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/Problem10_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:45:02,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:45:02,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:45:02,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:45:02,098 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 14:45:02,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:45:02,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:45:02,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:45:02,116 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:45:02,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:45:02,117 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:45:02,117 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:45:02,117 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:45:02,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:45:02,118 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:45:02,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:45:02,119 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:45:02,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:45:02,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:45:02,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:45:02,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:45:02,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:45:02,120 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:45:02,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:45:02,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:45:02,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:45:02,121 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:45:02,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:45:02,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:45:02,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:45:02,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:45:02,122 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:45:02,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:45:02,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:45:02,122 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:45:02,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:45:02,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:45:02,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:45:02,176 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:45:02,176 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:45:02,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label53.c [2019-09-09 14:45:02,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda32e17b/9cdfa410afe04670be3cc740612c0a5f/FLAG2ebf86957 [2019-09-09 14:45:02,846 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:45:02,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label53.c [2019-09-09 14:45:02,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda32e17b/9cdfa410afe04670be3cc740612c0a5f/FLAG2ebf86957 [2019-09-09 14:45:03,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda32e17b/9cdfa410afe04670be3cc740612c0a5f [2019-09-09 14:45:03,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:45:03,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:45:03,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:45:03,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:45:03,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:45:03,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48cb7fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03, skipping insertion in model container [2019-09-09 14:45:03,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,143 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:45:03,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:45:03,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:45:03,723 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:45:03,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:45:03,885 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:45:03,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03 WrapperNode [2019-09-09 14:45:03,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:45:03,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:45:03,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:45:03,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:45:03,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (1/1) ... [2019-09-09 14:45:03,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:45:03,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:45:03,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:45:03,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:45:03,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (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 14:45:04,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:45:04,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:45:04,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:45:04,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:45:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:45:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:45:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:45:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:45:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:45:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:45:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:45:05,315 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:45:05,316 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:45:05,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:45:05 BoogieIcfgContainer [2019-09-09 14:45:05,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:45:05,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:45:05,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:45:05,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:45:05,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:45:03" (1/3) ... [2019-09-09 14:45:05,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30548f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:45:05, skipping insertion in model container [2019-09-09 14:45:05,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:45:03" (2/3) ... [2019-09-09 14:45:05,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30548f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:45:05, skipping insertion in model container [2019-09-09 14:45:05,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:45:05" (3/3) ... [2019-09-09 14:45:05,326 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label53.c [2019-09-09 14:45:05,336 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:45:05,345 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:45:05,362 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:45:05,387 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:45:05,387 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:45:05,388 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:45:05,388 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:45:05,388 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:45:05,388 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:45:05,388 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:45:05,388 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:45:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:45:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-09 14:45:05,422 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:45:05,423 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] [2019-09-09 14:45:05,425 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:45:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:45:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 253834415, now seen corresponding path program 1 times [2019-09-09 14:45:05,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:45:05,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:05,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:45:05,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:05,472 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:45:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:45:05,728 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 14:45:05,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:45:05,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:45:05,731 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:45:05,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:45:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:45:05,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:45:05,756 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-09-09 14:45:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:45:07,355 INFO L93 Difference]: Finished difference Result 524 states and 762 transitions. [2019-09-09 14:45:07,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:45:07,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2019-09-09 14:45:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:45:07,377 INFO L225 Difference]: With dead ends: 524 [2019-09-09 14:45:07,377 INFO L226 Difference]: Without dead ends: 437 [2019-09-09 14:45:07,379 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 14:45:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-09-09 14:45:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-09-09 14:45:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:45:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2019-09-09 14:45:07,453 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 48 [2019-09-09 14:45:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:45:07,454 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2019-09-09 14:45:07,454 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:45:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2019-09-09 14:45:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-09 14:45:07,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:45:07,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:07,461 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:45:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:45:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -384487862, now seen corresponding path program 1 times [2019-09-09 14:45:07,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:45:07,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:07,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:45:07,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:07,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:45:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:45:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:45:07,721 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:45:07,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:45:07,721 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:45:07,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:45:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:45:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:45:07,727 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 6 states. [2019-09-09 14:45:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:45:08,762 INFO L93 Difference]: Finished difference Result 602 states and 885 transitions. [2019-09-09 14:45:08,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:45:08,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-09-09 14:45:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:45:08,768 INFO L225 Difference]: With dead ends: 602 [2019-09-09 14:45:08,768 INFO L226 Difference]: Without dead ends: 602 [2019-09-09 14:45:08,769 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 14:45:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-09-09 14:45:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2019-09-09 14:45:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-09-09 14:45:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 855 transitions. [2019-09-09 14:45:08,818 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 855 transitions. Word has length 122 [2019-09-09 14:45:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:45:08,819 INFO L475 AbstractCegarLoop]: Abstraction has 590 states and 855 transitions. [2019-09-09 14:45:08,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:45:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 855 transitions. [2019-09-09 14:45:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-09 14:45:08,828 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:45:08,828 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:08,829 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:45:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:45:08,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1716579338, now seen corresponding path program 1 times [2019-09-09 14:45:08,829 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:45:08,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:08,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:45:08,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:45:08,831 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:45:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:45:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:45:09,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:45:09,036 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:45:09,038 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 155 with the following transitions: [2019-09-09 14:45:09,040 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:45:09,111 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:45:09,111 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:45:32,480 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:45:32,482 INFO L272 AbstractInterpreter]: Visited 110 different actions 110 times. Never merged. Never widened. Performed 147 root evaluator evaluations with a maximum evaluation depth of 16. Performed 147 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:45:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:45:32,487 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:45:49,716 INFO L227 lantSequenceWeakener]: Weakened 148 states. On average, predicates are now at 73.45% of their original sizes. [2019-09-09 14:45:49,717 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:45:49,744 INFO L420 sIntCurrentIteration]: We unified 153 AI predicates to 153 [2019-09-09 14:45:49,744 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:45:49,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:45:49,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-09-09 14:45:49,745 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:45:49,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:45:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:45:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:45:49,747 INFO L87 Difference]: Start difference. First operand 590 states and 855 transitions. Second operand 7 states. [2019-09-09 14:45:56,003 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:49:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:49:22,348 INFO L93 Difference]: Finished difference Result 734 states and 1006 transitions. [2019-09-09 14:49:22,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:49:22,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2019-09-09 14:49:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:49:22,357 INFO L225 Difference]: With dead ends: 734 [2019-09-09 14:49:22,357 INFO L226 Difference]: Without dead ends: 734 [2019-09-09 14:49:22,357 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:49:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-09-09 14:49:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 733. [2019-09-09 14:49:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-09-09 14:49:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1005 transitions. [2019-09-09 14:49:22,388 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1005 transitions. Word has length 154 [2019-09-09 14:49:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:49:22,389 INFO L475 AbstractCegarLoop]: Abstraction has 733 states and 1005 transitions. [2019-09-09 14:49:22,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:49:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1005 transitions. [2019-09-09 14:49:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-09 14:49:22,401 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:49:22,402 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, 2, 2, 2, 2, 2, 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] [2019-09-09 14:49:22,402 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:49:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:49:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1678670381, now seen corresponding path program 1 times [2019-09-09 14:49:22,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:49:22,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:49:22,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:49:22,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:49:22,404 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:49:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:49:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-09 14:49:22,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:49:22,599 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:49:22,600 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2019-09-09 14:49:22,600 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:49:22,612 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:49:22,612 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:49:25,230 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:50:29,867 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:50:29,869 INFO L272 AbstractInterpreter]: Visited 114 different actions 222 times. Merged at 4 different actions 4 times. Never widened. Performed 437 root evaluator evaluations with a maximum evaluation depth of 16. Performed 437 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:50:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:50:29,870 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:51:10,563 INFO L227 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 73.27% of their original sizes. [2019-09-09 14:51:10,564 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:51:10,664 INFO L420 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2019-09-09 14:51:10,664 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:51:10,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:51:10,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 14:51:10,665 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:51:10,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:51:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:51:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:51:10,666 INFO L87 Difference]: Start difference. First operand 733 states and 1005 transitions. Second operand 11 states. [2019-09-09 14:57:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:57:37,749 INFO L93 Difference]: Finished difference Result 880 states and 1164 transitions. [2019-09-09 14:57:37,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 14:57:37,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 224 [2019-09-09 14:57:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:57:37,756 INFO L225 Difference]: With dead ends: 880 [2019-09-09 14:57:37,756 INFO L226 Difference]: Without dead ends: 880 [2019-09-09 14:57:37,756 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 14:57:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-09-09 14:57:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 878. [2019-09-09 14:57:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2019-09-09 14:57:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1162 transitions. [2019-09-09 14:57:37,785 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1162 transitions. Word has length 224 [2019-09-09 14:57:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:57:37,786 INFO L475 AbstractCegarLoop]: Abstraction has 878 states and 1162 transitions. [2019-09-09 14:57:37,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:57:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1162 transitions. [2019-09-09 14:57:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 14:57:37,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:57:37,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:57:37,792 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:57:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:57:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 259042280, now seen corresponding path program 1 times [2019-09-09 14:57:37,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:57:37,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:57:37,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:57:37,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:57:37,794 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:57:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:57:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 83 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 14:57:38,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:57:38,098 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:57:38,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-09 14:57:38,099 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [293], [295], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:57:38,104 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:57:38,104 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:57:49,336 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:58:24,798 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:58:24,799 INFO L272 AbstractInterpreter]: Visited 114 different actions 221 times. Merged at 3 different actions 3 times. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 16. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:58:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:58:24,800 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:58:53,480 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 73.25% of their original sizes. [2019-09-09 14:58:53,481 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:58:53,561 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-09 14:58:53,561 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:58:53,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:58:53,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 14:58:53,562 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:58:53,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:58:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:58:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:58:53,563 INFO L87 Difference]: Start difference. First operand 878 states and 1162 transitions. Second operand 11 states.