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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:33:44,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:33:44,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:33:44,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:33:44,406 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 19:33:44,420 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:33:44,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:33:44,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:33:44,421 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:33:44,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:33:44,422 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:33:44,422 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:33:44,423 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:33:44,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:33:44,423 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:33:44,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:33:44,424 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:33:44,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:33:44,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:33:44,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:33:44,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:33:44,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:33:44,426 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:33:44,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:33:44,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:33:44,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:33:44,427 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:33:44,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:33:44,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:33:44,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:33:44,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:33:44,428 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:33:44,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:33:44,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:33:44,429 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:33:44,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:33:44,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:33:44,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:33:44,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:33:44,500 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:33:44,501 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label48.c [2019-09-09 19:33:44,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd339eb4/52412b9f03e5412791468c730c5b0232/FLAG775614cd0 [2019-09-09 19:33:45,309 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:33:45,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label48.c [2019-09-09 19:33:45,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd339eb4/52412b9f03e5412791468c730c5b0232/FLAG775614cd0 [2019-09-09 19:33:45,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfd339eb4/52412b9f03e5412791468c730c5b0232 [2019-09-09 19:33:45,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:33:45,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:33:45,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:33:45,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:33:45,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:33:45,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:33:45" (1/1) ... [2019-09-09 19:33:45,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b47492e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:45, skipping insertion in model container [2019-09-09 19:33:45,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:33:45" (1/1) ... [2019-09-09 19:33:45,411 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:33:45,492 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:33:46,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:33:46,347 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:33:46,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:33:46,757 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:33:46,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46 WrapperNode [2019-09-09 19:33:46,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:33:46,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:33:46,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:33:46,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:33:46,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (1/1) ... [2019-09-09 19:33:46,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:33:46,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:33:46,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:33:46,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:33:46,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (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 19:33:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:33:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:33:47,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:33:47,067 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:33:47,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:33:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:33:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:33:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:33:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:33:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:33:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:33:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:33:47,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:33:50,755 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:33:50,755 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:33:50,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:33:50 BoogieIcfgContainer [2019-09-09 19:33:50,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:33:50,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:33:50,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:33:50,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:33:50,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:33:45" (1/3) ... [2019-09-09 19:33:50,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439926b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:33:50, skipping insertion in model container [2019-09-09 19:33:50,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:33:46" (2/3) ... [2019-09-09 19:33:50,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439926b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:33:50, skipping insertion in model container [2019-09-09 19:33:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:33:50" (3/3) ... [2019-09-09 19:33:50,766 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label48.c [2019-09-09 19:33:50,776 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:33:50,785 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:33:50,802 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:33:50,831 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:33:50,831 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:33:50,831 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:33:50,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:33:50,832 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:33:50,832 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:33:50,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:33:50,832 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:33:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:33:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-09 19:33:50,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:33:50,915 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] [2019-09-09 19:33:50,917 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:33:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:33:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1735320205, now seen corresponding path program 1 times [2019-09-09 19:33:50,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:33:50,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:33:50,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:33:50,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:33:50,968 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:33:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:33:51,242 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 19:33:51,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:33:51,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:33:51,245 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:33:51,251 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:33:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:33:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:33:51,269 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:33:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:33:55,889 INFO L93 Difference]: Finished difference Result 1066 states and 1447 transitions. [2019-09-09 19:33:55,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:33:55,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-09-09 19:33:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:33:55,918 INFO L225 Difference]: With dead ends: 1066 [2019-09-09 19:33:55,919 INFO L226 Difference]: Without dead ends: 993 [2019-09-09 19:33:55,920 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 19:33:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-09-09 19:33:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-09-09 19:33:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:33:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-09-09 19:33:56,016 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 33 [2019-09-09 19:33:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:33:56,017 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-09-09 19:33:56,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:33:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-09-09 19:33:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 19:33:56,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:33:56,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:56,022 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:33:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:33:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1696141066, now seen corresponding path program 1 times [2019-09-09 19:33:56,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:33:56,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:33:56,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:33:56,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:33:56,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:33:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:33:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:33:56,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:33:56,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:33:56,194 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:33:56,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:33:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:33:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:33:56,198 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 4 states. [2019-09-09 19:33:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:33:59,911 INFO L93 Difference]: Finished difference Result 1927 states and 2583 transitions. [2019-09-09 19:33:59,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:33:59,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-09-09 19:33:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:33:59,929 INFO L225 Difference]: With dead ends: 1927 [2019-09-09 19:33:59,929 INFO L226 Difference]: Without dead ends: 1927 [2019-09-09 19:33:59,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:33:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2019-09-09 19:33:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1923. [2019-09-09 19:33:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1923 states. [2019-09-09 19:33:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2575 transitions. [2019-09-09 19:33:59,992 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2575 transitions. Word has length 102 [2019-09-09 19:33:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:33:59,993 INFO L475 AbstractCegarLoop]: Abstraction has 1923 states and 2575 transitions. [2019-09-09 19:33:59,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:33:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2575 transitions. [2019-09-09 19:34:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-09 19:34:00,001 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:34:00,001 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:34:00,001 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:34:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:34:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash 362065713, now seen corresponding path program 1 times [2019-09-09 19:34:00,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:34:00,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:34:00,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:34:00,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:34:00,004 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:34:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:34:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 55 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:34:00,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:34:00,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:34:00,384 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2019-09-09 19:34:00,387 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], [245], [247], [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], [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], [816], [821], [823], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:34:00,441 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:34:00,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:34:03,399 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:34:08,213 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:34:08,216 INFO L272 AbstractInterpreter]: Visited 129 different actions 253 times. Merged at 4 different actions 5 times. Never widened. Performed 531 root evaluator evaluations with a maximum evaluation depth of 14. Performed 531 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 19:34:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:34:08,220 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:34:10,010 INFO L227 lantSequenceWeakener]: Weakened 246 states. On average, predicates are now at 77.55% of their original sizes. [2019-09-09 19:34:10,010 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:34:10,128 INFO L420 sIntCurrentIteration]: We unified 250 AI predicates to 250 [2019-09-09 19:34:10,128 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:34:10,129 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:34:10,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:34:10,130 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:34:10,130 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:34:10,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:34:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:34:10,131 INFO L87 Difference]: Start difference. First operand 1923 states and 2575 transitions. Second operand 12 states.