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_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:10:09,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:10:09,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:10:09,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 21:10:09,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 21:10:09,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 21:10:09,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 21:10:09,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 21:10:09,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 21:10:09,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 21:10:09,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 21:10:09,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 21:10:09,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:10:09,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:10:10,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:10:10,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:10:10,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:10:10,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:10:10,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:10:10,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:10:10,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:10:10,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:10:10,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:10:10,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:10:10,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:10:10,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:10:10,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:10:10,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:10:10,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:10:10,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:10:10,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:10:10,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:10:10,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-10-02 21:10:10,041 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 [2019-10-02 21:10:10,063 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:10:10,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:10:10,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:10:10,064 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:10:10,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:10:10,065 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:10:10,065 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:10:10,066 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:10:10,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:10:10,066 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:10:10,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:10:10,068 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:10:10,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:10:10,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:10:10,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:10:10,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:10:10,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:10:10,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:10:10,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:10:10,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:10:10,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:10:10,071 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:10:10,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:10:10,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:10:10,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:10:10,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:10:10,072 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:10:10,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:10:10,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:10:10,073 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:10:10,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:10:10,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:10:10,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:10:10,146 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:10:10,148 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:10:10,149 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-10-02 21:10:10,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b19c74e/f2c8f5bf33b0489380accd916840fa87/FLAGfccbfc173 [2019-10-02 21:10:10,920 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:10:10,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label49.c [2019-10-02 21:10:10,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b19c74e/f2c8f5bf33b0489380accd916840fa87/FLAGfccbfc173 [2019-10-02 21:10:11,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b19c74e/f2c8f5bf33b0489380accd916840fa87 [2019-10-02 21:10:11,087 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:10:11,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:10:11,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:10:11,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:10:11,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:10:11,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:10:11" (1/1) ... [2019-10-02 21:10:11,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335d4cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:11, skipping insertion in model container [2019-10-02 21:10:11,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:10:11" (1/1) ... [2019-10-02 21:10:11,113 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:10:11,210 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:10:12,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:10:12,110 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:10:12,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:10:12,451 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:10:12,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12 WrapperNode [2019-10-02 21:10:12,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:10:12,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:10:12,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:10:12,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:10:12,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (1/1) ... [2019-10-02 21:10:12,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:10:12,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:10:12,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:10:12,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:10:12,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (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 [2019-10-02 21:10:12,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:10:12,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:10:12,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:10:12,714 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:10:12,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:10:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:10:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:10:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:10:12,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:10:12,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:10:12,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:10:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:10:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:10:16,745 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:10:16,745 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:10:16,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:10:16 BoogieIcfgContainer [2019-10-02 21:10:16,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:10:16,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:10:16,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:10:16,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:10:16,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:10:11" (1/3) ... [2019-10-02 21:10:16,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:10:16, skipping insertion in model container [2019-10-02 21:10:16,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:10:12" (2/3) ... [2019-10-02 21:10:16,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f362a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:10:16, skipping insertion in model container [2019-10-02 21:10:16,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:10:16" (3/3) ... [2019-10-02 21:10:16,759 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label49.c [2019-10-02 21:10:16,774 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:10:16,786 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:10:16,809 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:10:16,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:10:16,846 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:10:16,847 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:10:16,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:10:16,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:10:16,847 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:10:16,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:10:16,848 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:10:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-02 21:10:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-02 21:10:16,938 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:16,939 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:16,942 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1661413296, now seen corresponding path program 1 times [2019-10-02 21:10:16,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:17,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:17,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:17,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:17,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:17,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:10:17,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:10:17,371 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:17,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:10:17,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:10:17,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:10:17,398 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-02 21:10:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:22,367 INFO L93 Difference]: Finished difference Result 1115 states and 1741 transitions. [2019-10-02 21:10:22,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:10:22,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2019-10-02 21:10:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:22,401 INFO L225 Difference]: With dead ends: 1115 [2019-10-02 21:10:22,401 INFO L226 Difference]: Without dead ends: 1028 [2019-10-02 21:10:22,403 INFO L640 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 [2019-10-02 21:10:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-02 21:10:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 700. [2019-10-02 21:10:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-02 21:10:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1110 transitions. [2019-10-02 21:10:22,501 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1110 transitions. Word has length 58 [2019-10-02 21:10:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:22,502 INFO L475 AbstractCegarLoop]: Abstraction has 700 states and 1110 transitions. [2019-10-02 21:10:22,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:10:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1110 transitions. [2019-10-02 21:10:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 21:10:22,509 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:22,509 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:22,509 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1221807989, now seen corresponding path program 1 times [2019-10-02 21:10:22,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:22,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:22,512 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:22,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:10:22,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:10:22,705 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:22,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:10:22,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:10:22,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:10:22,707 INFO L87 Difference]: Start difference. First operand 700 states and 1110 transitions. Second operand 5 states. [2019-10-02 21:10:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:27,431 INFO L93 Difference]: Finished difference Result 1363 states and 1890 transitions. [2019-10-02 21:10:27,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 21:10:27,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-02 21:10:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:27,445 INFO L225 Difference]: With dead ends: 1363 [2019-10-02 21:10:27,445 INFO L226 Difference]: Without dead ends: 1363 [2019-10-02 21:10:27,446 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 21:10:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2019-10-02 21:10:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1333. [2019-10-02 21:10:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-02 21:10:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1846 transitions. [2019-10-02 21:10:27,532 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1846 transitions. Word has length 130 [2019-10-02 21:10:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:27,532 INFO L475 AbstractCegarLoop]: Abstraction has 1333 states and 1846 transitions. [2019-10-02 21:10:27,533 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:10:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1846 transitions. [2019-10-02 21:10:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-02 21:10:27,536 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:27,536 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:27,537 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:27,538 INFO L82 PathProgramCache]: Analyzing trace with hash -78025861, now seen corresponding path program 1 times [2019-10-02 21:10:27,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:27,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:27,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:27,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:27,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:27,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:10:27,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:10:27,697 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:27,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:10:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:10:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:10:27,700 INFO L87 Difference]: Start difference. First operand 1333 states and 1846 transitions. Second operand 4 states. [2019-10-02 21:10:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:32,409 INFO L93 Difference]: Finished difference Result 3822 states and 4963 transitions. [2019-10-02 21:10:32,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:10:32,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-02 21:10:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:32,438 INFO L225 Difference]: With dead ends: 3822 [2019-10-02 21:10:32,439 INFO L226 Difference]: Without dead ends: 3822 [2019-10-02 21:10:32,444 INFO L640 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 [2019-10-02 21:10:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2019-10-02 21:10:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3819. [2019-10-02 21:10:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3819 states. [2019-10-02 21:10:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 4957 transitions. [2019-10-02 21:10:32,570 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 4957 transitions. Word has length 138 [2019-10-02 21:10:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:32,571 INFO L475 AbstractCegarLoop]: Abstraction has 3819 states and 4957 transitions. [2019-10-02 21:10:32,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:10:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 4957 transitions. [2019-10-02 21:10:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 21:10:32,583 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:32,583 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:32,584 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash 90955185, now seen corresponding path program 1 times [2019-10-02 21:10:32,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:32,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:32,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:32,589 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:32,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:10:32,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:10:32,764 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:32,765 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:10:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:10:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:10:32,766 INFO L87 Difference]: Start difference. First operand 3819 states and 4957 transitions. Second operand 6 states. [2019-10-02 21:10:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:10:36,225 INFO L93 Difference]: Finished difference Result 3899 states and 4936 transitions. [2019-10-02 21:10:36,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:10:36,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-02 21:10:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:10:36,249 INFO L225 Difference]: With dead ends: 3899 [2019-10-02 21:10:36,249 INFO L226 Difference]: Without dead ends: 3899 [2019-10-02 21:10:36,250 INFO L640 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 [2019-10-02 21:10:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2019-10-02 21:10:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3889. [2019-10-02 21:10:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3889 states. [2019-10-02 21:10:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 4912 transitions. [2019-10-02 21:10:36,395 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 4912 transitions. Word has length 144 [2019-10-02 21:10:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:10:36,397 INFO L475 AbstractCegarLoop]: Abstraction has 3889 states and 4912 transitions. [2019-10-02 21:10:36,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:10:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 4912 transitions. [2019-10-02 21:10:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-02 21:10:36,399 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:10:36,400 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:10:36,400 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:10:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2025648949, now seen corresponding path program 1 times [2019-10-02 21:10:36,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:10:36,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:36,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:10:36,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:10:36,404 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:10:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:10:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:10:36,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:10:36,784 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:10:36,785 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 170 with the following transitions: [2019-10-02 21:10:36,788 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [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], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:10:36,867 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:10:36,867 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:10:40,330 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:10:40,333 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Performed 269 root evaluator evaluations with a maximum evaluation depth of 13. Performed 269 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:10:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:10:40,337 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:10:42,201 INFO L227 lantSequenceWeakener]: Weakened 155 states. On average, predicates are now at 78.64% of their original sizes. [2019-10-02 21:10:42,202 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:10:42,277 INFO L420 sIntCurrentIteration]: We unified 168 AI predicates to 168 [2019-10-02 21:10:42,277 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:10:42,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:10:42,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2019-10-02 21:10:42,279 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:10:42,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:10:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:10:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:10:42,280 INFO L87 Difference]: Start difference. First operand 3889 states and 4912 transitions. Second operand 11 states. [2019-10-02 21:10:52,402 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:20:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:20:44,057 INFO L93 Difference]: Finished difference Result 4200 states and 5236 transitions. [2019-10-02 21:20:44,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 21:20:44,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2019-10-02 21:20:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:20:44,079 INFO L225 Difference]: With dead ends: 4200 [2019-10-02 21:20:44,080 INFO L226 Difference]: Without dead ends: 4200 [2019-10-02 21:20:44,080 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-02 21:20:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2019-10-02 21:20:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 4196. [2019-10-02 21:20:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4196 states. [2019-10-02 21:20:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 5228 transitions. [2019-10-02 21:20:44,163 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 5228 transitions. Word has length 169 [2019-10-02 21:20:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:20:44,164 INFO L475 AbstractCegarLoop]: Abstraction has 4196 states and 5228 transitions. [2019-10-02 21:20:44,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 21:20:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 5228 transitions. [2019-10-02 21:20:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-10-02 21:20:44,168 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:20:44,169 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:20:44,169 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:20:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:20:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1848806281, now seen corresponding path program 1 times [2019-10-02 21:20:44,170 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:20:44,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:20:44,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:20:44,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:20:44,172 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:20:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:20:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 5 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:20:44,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:20:44,862 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:20:44,863 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 265 with the following transitions: [2019-10-02 21:20:44,863 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [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], [762], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-10-02 21:20:44,869 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:20:44,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:20:46,042 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 21:20:48,774 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:20:48,775 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 500 root evaluator evaluations with a maximum evaluation depth of 13. Performed 500 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 21:20:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:20:48,776 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:20:50,056 INFO L227 lantSequenceWeakener]: Weakened 261 states. On average, predicates are now at 77.97% of their original sizes. [2019-10-02 21:20:50,057 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:20:50,157 INFO L420 sIntCurrentIteration]: We unified 263 AI predicates to 263 [2019-10-02 21:20:50,157 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:20:50,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:20:50,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2019-10-02 21:20:50,158 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:20:50,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 21:20:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 21:20:50,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-02 21:20:50,160 INFO L87 Difference]: Start difference. First operand 4196 states and 5228 transitions. Second operand 12 states.