java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:02:13,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:02:13,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:02:13,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:02:13,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 19:02:13,798 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:02:13,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:02:13,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:02:13,800 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:02:13,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:02:13,801 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:02:13,801 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:02:13,801 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:02:13,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:02:13,801 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:02:13,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:02:13,804 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:02:13,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:02:13,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:02:13,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:02:13,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:02:13,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:02:13,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:02:13,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:02:13,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:02:13,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:02:13,806 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:02:13,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:02:13,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:02:13,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:02:13,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:02:13,807 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:02:13,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:02:13,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:02:13,807 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:02:13,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:02:13,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:02:13,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:02:13,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:02:13,876 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:02:13,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2019-09-09 19:02:13,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8b7cc8a/20d0f5577b3d4a19b98686df68cb8519/FLAG2ef63a010 [2019-09-09 19:02:14,667 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:02:14,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label19.c [2019-09-09 19:02:14,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8b7cc8a/20d0f5577b3d4a19b98686df68cb8519/FLAG2ef63a010 [2019-09-09 19:02:14,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8b7cc8a/20d0f5577b3d4a19b98686df68cb8519 [2019-09-09 19:02:14,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:02:14,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:02:14,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:02:14,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:02:14,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:02:14,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:02:14" (1/1) ... [2019-09-09 19:02:14,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13581c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:14, skipping insertion in model container [2019-09-09 19:02:14,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:02:14" (1/1) ... [2019-09-09 19:02:14,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:02:14,927 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:02:15,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:02:15,906 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:02:16,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:02:16,294 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:02:16,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16 WrapperNode [2019-09-09 19:02:16,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:02:16,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:02:16,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:02:16,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:02:16,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... [2019-09-09 19:02:16,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:02:16,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:02:16,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:02:16,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:02:16,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:02:16,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:02:16,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:02:16,560 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:02:16,560 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:02:16,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:02:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:02:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:02:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:02:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:02:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:02:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:02:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:02:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:02:19,423 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:02:19,423 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:02:19,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:02:19 BoogieIcfgContainer [2019-09-09 19:02:19,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:02:19,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:02:19,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:02:19,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:02:19,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:02:14" (1/3) ... [2019-09-09 19:02:19,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5861a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:02:19, skipping insertion in model container [2019-09-09 19:02:19,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:02:16" (2/3) ... [2019-09-09 19:02:19,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5861a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:02:19, skipping insertion in model container [2019-09-09 19:02:19,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:02:19" (3/3) ... [2019-09-09 19:02:19,435 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label19.c [2019-09-09 19:02:19,446 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:02:19,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:02:19,474 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:02:19,502 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:02:19,502 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:02:19,502 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:02:19,502 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:02:19,502 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:02:19,503 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:02:19,503 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:02:19,503 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:02:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:02:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-09 19:02:19,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:02:19,546 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:02:19,548 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:02:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:02:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1728507445, now seen corresponding path program 1 times [2019-09-09 19:02:19,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:02:19,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:02:19,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:02:19,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:02:19,610 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:02:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:02:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:02:19,950 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:02:19,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:02:19,950 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:02:19,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:02:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:02:19,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:02:19,974 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:02:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:02:24,708 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-09-09 19:02:24,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:02:24,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-09-09 19:02:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:02:24,742 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 19:02:24,742 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 19:02:24,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:02:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 19:02:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-09-09 19:02:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-09 19:02:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-09-09 19:02:24,845 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 51 [2019-09-09 19:02:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:02:24,845 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-09-09 19:02:24,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:02:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-09-09 19:02:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-09 19:02:24,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:02:24,852 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:02:24,853 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:02:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:02:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash 882457234, now seen corresponding path program 1 times [2019-09-09 19:02:24,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:02:24,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:02:24,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:02:24,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:02:24,855 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:02:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:02:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:02:25,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:02:25,230 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:02:25,231 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 121 with the following transitions: [2019-09-09 19:02:25,233 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [566], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:02:25,282 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:02:25,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:02:26,004 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:02:26,007 INFO L272 AbstractInterpreter]: Visited 73 different actions 73 times. Never merged. Never widened. Performed 185 root evaluator evaluations with a maximum evaluation depth of 9. Performed 185 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:02:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:02:26,012 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:02:26,826 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 78.97% of their original sizes. [2019-09-09 19:02:26,827 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:02:26,912 INFO L420 sIntCurrentIteration]: We unified 119 AI predicates to 119 [2019-09-09 19:02:26,912 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:02:26,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:02:26,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2019-09-09 19:02:26,914 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:02:26,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 19:02:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 19:02:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:02:26,920 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 10 states. [2019-09-09 19:02:34,490 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:12:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:12:30,863 INFO L93 Difference]: Finished difference Result 1008 states and 1510 transitions. [2019-09-09 19:12:30,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 19:12:30,863 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2019-09-09 19:12:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:12:30,870 INFO L225 Difference]: With dead ends: 1008 [2019-09-09 19:12:30,870 INFO L226 Difference]: Without dead ends: 1008 [2019-09-09 19:12:30,871 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 19:12:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2019-09-09 19:12:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1004. [2019-09-09 19:12:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2019-09-09 19:12:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1503 transitions. [2019-09-09 19:12:30,910 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1503 transitions. Word has length 120 [2019-09-09 19:12:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:12:30,910 INFO L475 AbstractCegarLoop]: Abstraction has 1004 states and 1503 transitions. [2019-09-09 19:12:30,910 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 19:12:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1503 transitions. [2019-09-09 19:12:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-09 19:12:30,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:12:30,914 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:12:30,914 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:12:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:12:30,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1652859948, now seen corresponding path program 1 times [2019-09-09 19:12:30,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:12:30,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:12:30,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:12:30,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:12:30,917 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:12:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:12:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:12:31,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:12:31,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:12:31,028 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:12:31,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:12:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:12:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:12:31,030 INFO L87 Difference]: Start difference. First operand 1004 states and 1503 transitions. Second operand 3 states. [2019-09-09 19:12:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:12:33,583 INFO L93 Difference]: Finished difference Result 1621 states and 2246 transitions. [2019-09-09 19:12:33,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:12:33,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-09-09 19:12:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:12:33,597 INFO L225 Difference]: With dead ends: 1621 [2019-09-09 19:12:33,597 INFO L226 Difference]: Without dead ends: 1621 [2019-09-09 19:12:33,598 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 19:12:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2019-09-09 19:12:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1621. [2019-09-09 19:12:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1621 states. [2019-09-09 19:12:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2246 transitions. [2019-09-09 19:12:33,661 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2246 transitions. Word has length 146 [2019-09-09 19:12:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:12:33,662 INFO L475 AbstractCegarLoop]: Abstraction has 1621 states and 2246 transitions. [2019-09-09 19:12:33,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:12:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2246 transitions. [2019-09-09 19:12:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-09-09 19:12:33,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:12:33,675 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 19:12:33,675 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:12:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:12:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1466719957, now seen corresponding path program 1 times [2019-09-09 19:12:33,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:12:33,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:12:33,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:12:33,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:12:33,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:12:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:12:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 89 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:12:34,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:12:34,043 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:12:34,044 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 275 with the following transitions: [2019-09-09 19:12:34,044 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [872], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:12:34,051 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:12:34,051 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:12:35,201 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:12:40,035 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:12:40,037 INFO L272 AbstractInterpreter]: Visited 136 different actions 267 times. Merged at 4 different actions 5 times. Never widened. Performed 551 root evaluator evaluations with a maximum evaluation depth of 14. Performed 551 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:12:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:12:40,037 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:12:42,046 INFO L227 lantSequenceWeakener]: Weakened 271 states. On average, predicates are now at 77.82% of their original sizes. [2019-09-09 19:12:42,047 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:12:42,147 INFO L420 sIntCurrentIteration]: We unified 273 AI predicates to 273 [2019-09-09 19:12:42,148 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:12:42,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:12:42,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:12:42,149 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:12:42,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:12:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:12:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:12:42,150 INFO L87 Difference]: Start difference. First operand 1621 states and 2246 transitions. Second operand 12 states.