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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:35:20,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:35:20,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:35:20,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:35:20,584 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 14:35:20,599 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:35:20,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:35:20,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:35:20,600 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:35:20,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:35:20,601 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:35:20,601 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:35:20,601 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:35:20,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:35:20,602 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:35:20,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:35:20,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:35:20,604 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:35:20,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:35:20,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:35:20,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:35:20,604 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:35:20,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:35:20,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:35:20,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:35:20,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:35:20,605 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:35:20,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:35:20,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:35:20,606 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:35:20,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:35:20,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:35:20,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:35:20,661 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:35:20,662 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:35:20,662 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label41.c [2019-09-09 14:35:20,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278c4e1d0/5f2557aa0fd44caabab563c3c9035d72/FLAGb41307239 [2019-09-09 14:35:21,321 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:35:21,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label41.c [2019-09-09 14:35:21,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278c4e1d0/5f2557aa0fd44caabab563c3c9035d72/FLAGb41307239 [2019-09-09 14:35:21,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/278c4e1d0/5f2557aa0fd44caabab563c3c9035d72 [2019-09-09 14:35:21,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:35:21,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:35:21,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:35:21,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:35:21,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:35:21,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:35:21" (1/1) ... [2019-09-09 14:35:21,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a30005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:21, skipping insertion in model container [2019-09-09 14:35:21,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:35:21" (1/1) ... [2019-09-09 14:35:21,665 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:35:21,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:35:22,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:35:22,253 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:35:22,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:35:22,446 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:35:22,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22 WrapperNode [2019-09-09 14:35:22,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:35:22,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:35:22,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:35:22,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:35:22,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (1/1) ... [2019-09-09 14:35:22,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:35:22,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:35:22,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:35:22,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:35:22,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (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 14:35:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:35:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:35:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:35:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:35:22,691 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:35:22,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:35:22,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:35:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:35:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:35:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:35:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:35:23,960 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:35:23,961 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:35:23,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:35:23 BoogieIcfgContainer [2019-09-09 14:35:23,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:35:23,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:35:23,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:35:23,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:35:23,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:35:21" (1/3) ... [2019-09-09 14:35:23,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee00768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:35:23, skipping insertion in model container [2019-09-09 14:35:23,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:35:22" (2/3) ... [2019-09-09 14:35:23,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee00768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:35:23, skipping insertion in model container [2019-09-09 14:35:23,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:35:23" (3/3) ... [2019-09-09 14:35:23,971 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label41.c [2019-09-09 14:35:23,982 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:35:23,991 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:35:24,009 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:35:24,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:35:24,038 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:35:24,039 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:35:24,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:35:24,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:35:24,039 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:35:24,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:35:24,040 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:35:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:35:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-09 14:35:24,076 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:35:24,077 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] [2019-09-09 14:35:24,080 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:35:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:24,086 INFO L82 PathProgramCache]: Analyzing trace with hash -354743369, now seen corresponding path program 1 times [2019-09-09 14:35:24,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:35:24,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:24,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:35:24,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:24,142 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:35:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:35:24,341 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 14:35:24,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:35:24,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:35:24,344 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:35:24,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:35:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:35:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:35:24,368 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-09-09 14:35:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:35:25,414 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-09-09 14:35:25,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:35:25,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-09-09 14:35:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:35:25,447 INFO L225 Difference]: With dead ends: 362 [2019-09-09 14:35:25,447 INFO L226 Difference]: Without dead ends: 294 [2019-09-09 14:35:25,450 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 14:35:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-09 14:35:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-09 14:35:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:35:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-09-09 14:35:25,569 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 26 [2019-09-09 14:35:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:35:25,569 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-09-09 14:35:25,569 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:35:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-09-09 14:35:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-09 14:35:25,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:35:25,580 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:35:25,580 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:35:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:25,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1460648607, now seen corresponding path program 1 times [2019-09-09 14:35:25,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:35:25,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:25,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:35:25,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:25,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:35:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:35:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:35:25,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:35:25,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:35:25,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:35:25,919 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:35:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:35:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:35:25,920 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-09-09 14:35:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:35:26,867 INFO L93 Difference]: Finished difference Result 453 states and 640 transitions. [2019-09-09 14:35:26,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:35:26,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-09-09 14:35:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:35:26,872 INFO L225 Difference]: With dead ends: 453 [2019-09-09 14:35:26,872 INFO L226 Difference]: Without dead ends: 453 [2019-09-09 14:35:26,873 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 14:35:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-09-09 14:35:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-09-09 14:35:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-09-09 14:35:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-09-09 14:35:26,893 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 99 [2019-09-09 14:35:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:35:26,894 INFO L475 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-09-09 14:35:26,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:35:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-09-09 14:35:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-09 14:35:26,898 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:35:26,898 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 14:35:26,899 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:35:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash -361920971, now seen corresponding path program 1 times [2019-09-09 14:35:26,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:35:26,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:26,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:35:26,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:35:26,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:35:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:35:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:35:27,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:35:27,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:35:27,054 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2019-09-09 14:35:27,056 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [117], [119], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [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], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:35:27,108 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:35:27,108 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:35:39,765 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:35:51,607 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:35:51,610 INFO L272 AbstractInterpreter]: Visited 86 different actions 165 times. Merged at 3 different actions 3 times. Never widened. Performed 300 root evaluator evaluations with a maximum evaluation depth of 16. Performed 300 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 14:35:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:35:51,615 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:36:01,600 INFO L227 lantSequenceWeakener]: Weakened 102 states. On average, predicates are now at 72.85% of their original sizes. [2019-09-09 14:36:01,601 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:36:01,687 INFO L420 sIntCurrentIteration]: We unified 104 AI predicates to 104 [2019-09-09 14:36:01,688 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:36:01,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:36:01,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 14:36:01,689 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:36:01,690 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:36:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:36:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:36:01,691 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 11 states. [2019-09-09 14:40:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:40:01,038 INFO L93 Difference]: Finished difference Result 755 states and 952 transitions. [2019-09-09 14:40:01,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:40:01,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2019-09-09 14:40:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:40:01,044 INFO L225 Difference]: With dead ends: 755 [2019-09-09 14:40:01,045 INFO L226 Difference]: Without dead ends: 755 [2019-09-09 14:40:01,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 14:40:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2019-09-09 14:40:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 588. [2019-09-09 14:40:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2019-09-09 14:40:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 775 transitions. [2019-09-09 14:40:01,065 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 775 transitions. Word has length 105 [2019-09-09 14:40:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:40:01,066 INFO L475 AbstractCegarLoop]: Abstraction has 588 states and 775 transitions. [2019-09-09 14:40:01,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:40:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 775 transitions. [2019-09-09 14:40:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-09 14:40:01,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:40:01,071 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 14:40:01,071 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:40:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:40:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1981372498, now seen corresponding path program 1 times [2019-09-09 14:40:01,072 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:40:01,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:40:01,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:40:01,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:40:01,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:40:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:40:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 39 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-09 14:40:01,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:40:01,303 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:40:01,304 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 176 with the following transitions: [2019-09-09 14:40:01,304 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [117], [119], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [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], [534], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:40:01,313 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:40:01,313 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:40:04,108 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:41:35,247 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-09 14:41:35,248 INFO L272 AbstractInterpreter]: Visited 88 different actions 425 times. Merged at 6 different actions 27 times. Never widened. Performed 1076 root evaluator evaluations with a maximum evaluation depth of 16. Performed 1076 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 14:41:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:41:35,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-09 14:41:35,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:41:35,252 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-09 14:41:35,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:41:35,266 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-09 14:41:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:41:35,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-09 14:41:35,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-09 14:41:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:41:35,468 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-09 14:41:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:41:35,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-09 14:41:35,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2019-09-09 14:41:35,612 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-09 14:41:35,612 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:41:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:41:35,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-09-09 14:41:35,618 INFO L87 Difference]: Start difference. First operand 588 states and 775 transitions. Second operand 11 states. [2019-09-09 14:41:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:41:38,777 INFO L93 Difference]: Finished difference Result 2227 states and 2879 transitions. [2019-09-09 14:41:38,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-09 14:41:38,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 175 [2019-09-09 14:41:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:41:38,804 INFO L225 Difference]: With dead ends: 2227 [2019-09-09 14:41:38,804 INFO L226 Difference]: Without dead ends: 2082 [2019-09-09 14:41:38,805 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 357 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2019-09-09 14:41:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2019-09-09 14:41:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1919. [2019-09-09 14:41:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-09-09 14:41:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2466 transitions. [2019-09-09 14:41:38,875 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2466 transitions. Word has length 175 [2019-09-09 14:41:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:41:38,876 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 2466 transitions. [2019-09-09 14:41:38,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:41:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2466 transitions. [2019-09-09 14:41:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-09-09 14:41:38,883 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:41:38,883 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 14:41:38,883 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:41:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:41:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash -498295095, now seen corresponding path program 1 times [2019-09-09 14:41:38,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:41:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:38,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:41:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:38,885 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:41:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:41:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-09 14:41:39,025 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:41:39,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:41:39,026 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:41:39,027 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:41:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:41:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:41:39,027 INFO L87 Difference]: Start difference. First operand 1919 states and 2466 transitions. Second operand 3 states. [2019-09-09 14:41:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:41:39,674 INFO L93 Difference]: Finished difference Result 2936 states and 3737 transitions. [2019-09-09 14:41:39,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:41:39,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-09-09 14:41:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:41:39,695 INFO L225 Difference]: With dead ends: 2936 [2019-09-09 14:41:39,695 INFO L226 Difference]: Without dead ends: 2936 [2019-09-09 14:41:39,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 14:41:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2019-09-09 14:41:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2507. [2019-09-09 14:41:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2507 states. [2019-09-09 14:41:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 3212 transitions. [2019-09-09 14:41:39,777 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 3212 transitions. Word has length 208 [2019-09-09 14:41:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:41:39,777 INFO L475 AbstractCegarLoop]: Abstraction has 2507 states and 3212 transitions. [2019-09-09 14:41:39,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:41:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 3212 transitions. [2019-09-09 14:41:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-09 14:41:39,784 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:41:39,784 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:41:39,784 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:41:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:41:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1063407853, now seen corresponding path program 1 times [2019-09-09 14:41:39,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:41:39,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:39,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:41:39,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:39,786 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:41:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:41:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 52 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:41:40,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:41:40,957 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:41:40,957 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2019-09-09 14:41:40,958 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [117], [119], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [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], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [686], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:41:40,963 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:41:40,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:42:14,660 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:43:19,538 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:43:19,539 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 4 different actions 4 times. Never widened. Performed 470 root evaluator evaluations with a maximum evaluation depth of 16. Performed 470 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 14:43:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:43:19,539 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:44:57,031 INFO L227 lantSequenceWeakener]: Weakened 255 states. On average, predicates are now at 72.8% of their original sizes. [2019-09-09 14:44:57,031 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:44:57,138 INFO L420 sIntCurrentIteration]: We unified 257 AI predicates to 257 [2019-09-09 14:44:57,139 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:44:57,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:44:57,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2019-09-09 14:44:57,139 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:44:57,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 14:44:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 14:44:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-09 14:44:57,141 INFO L87 Difference]: Start difference. First operand 2507 states and 3212 transitions. Second operand 12 states.