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/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:58:55,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:58:55,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:58:55,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 21:58:55,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 21:58:55,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 21:58:55,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 21:58:55,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 21:58:55,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 21:58:55,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 21:58:55,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 21:58:55,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 21:58:55,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:58:55,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:58:55,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:58:55,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:58:55,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:58:55,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:58:55,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:58:55,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:58:55,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:58:55,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:58:55,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:58:55,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:58:55,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:58:55,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:58:55,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:58:55,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:58:55,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:58:55,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:58:55,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:58:55,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:58:55,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:58:55,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:58:55,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:58:55,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:58:55,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 21:58:55,120 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:58:55,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:58:55,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:58:55,121 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:58:55,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:58:55,122 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:58:55,122 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:58:55,122 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:58:55,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:58:55,123 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:58:55,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:58:55,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:58:55,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:58:55,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:58:55,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:58:55,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:58:55,127 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:58:55,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:58:55,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:58:55,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:58:55,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:58:55,128 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:58:55,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:58:55,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:58:55,129 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:58:55,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:58:55,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:58:55,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:58:55,205 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:58:55,206 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:58:55,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-10-02 21:58:55,273 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93d0d210/9f5176915c2f404f829d41f7f5c15e25/FLAG8168f5677 [2019-10-02 21:58:55,986 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:58:55,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label23.c [2019-10-02 21:58:56,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93d0d210/9f5176915c2f404f829d41f7f5c15e25/FLAG8168f5677 [2019-10-02 21:58:56,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93d0d210/9f5176915c2f404f829d41f7f5c15e25 [2019-10-02 21:58:56,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:58:56,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:58:56,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:58:56,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:58:56,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:58:56,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:58:56" (1/1) ... [2019-10-02 21:58:56,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:56, skipping insertion in model container [2019-10-02 21:58:56,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:58:56" (1/1) ... [2019-10-02 21:58:56,175 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:58:56,322 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:58:57,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:58:57,585 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:58:58,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:58:58,067 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:58:58,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58 WrapperNode [2019-10-02 21:58:58,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:58:58,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:58:58,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:58:58,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:58:58,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (1/1) ... [2019-10-02 21:58:58,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:58:58,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:58:58,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:58:58,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:58:58,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (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 21:58:58,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:58:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:58:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:58:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:58:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 21:58:58,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:58:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:58:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:58:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 21:58:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:58:58,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:58:58,451 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:58:58,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:58:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:58:58,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:59:02,258 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:59:02,259 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:59:02,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:59:02 BoogieIcfgContainer [2019-10-02 21:59:02,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:59:02,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:59:02,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:59:02,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:59:02,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:58:56" (1/3) ... [2019-10-02 21:59:02,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3619e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:59:02, skipping insertion in model container [2019-10-02 21:59:02,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:58:58" (2/3) ... [2019-10-02 21:59:02,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3619e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:59:02, skipping insertion in model container [2019-10-02 21:59:02,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:59:02" (3/3) ... [2019-10-02 21:59:02,271 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2019-10-02 21:59:02,281 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:59:02,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:59:02,308 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:59:02,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:59:02,341 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:59:02,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:59:02,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:59:02,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:59:02,341 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:59:02,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:59:02,342 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:59:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-02 21:59:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 21:59:02,405 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:02,406 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, 1, 1, 1] [2019-10-02 21:59:02,409 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1957259726, now seen corresponding path program 1 times [2019-10-02 21:59:02,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:02,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:02,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:02,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:02,553 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:02,925 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 21:59:02,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:59:02,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:59:02,927 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:02,933 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:59:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:59:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:59:02,950 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-02 21:59:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:59:07,472 INFO L93 Difference]: Finished difference Result 1480 states and 2667 transitions. [2019-10-02 21:59:07,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:59:07,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2019-10-02 21:59:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:59:07,507 INFO L225 Difference]: With dead ends: 1480 [2019-10-02 21:59:07,507 INFO L226 Difference]: Without dead ends: 1412 [2019-10-02 21:59:07,509 INFO L640 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 [2019-10-02 21:59:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-02 21:59:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-02 21:59:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-02 21:59:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-02 21:59:07,629 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 61 [2019-10-02 21:59:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:59:07,630 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-02 21:59:07,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:59:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-02 21:59:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-02 21:59:07,636 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:07,636 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, 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 21:59:07,637 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2051582907, now seen corresponding path program 1 times [2019-10-02 21:59:07,638 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:07,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:07,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:07,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:59:07,805 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:59:07,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:59:07,805 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:07,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:59:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:59:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:59:07,808 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-02 21:59:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:59:13,222 INFO L93 Difference]: Finished difference Result 2166 states and 3658 transitions. [2019-10-02 21:59:13,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:59:13,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-02 21:59:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:59:13,237 INFO L225 Difference]: With dead ends: 2166 [2019-10-02 21:59:13,237 INFO L226 Difference]: Without dead ends: 2166 [2019-10-02 21:59:13,241 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 21:59:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-02 21:59:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-02 21:59:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-02 21:59:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-02 21:59:13,313 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 132 [2019-10-02 21:59:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:59:13,316 INFO L475 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-02 21:59:13,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:59:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-02 21:59:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-02 21:59:13,331 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:13,332 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, 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] [2019-10-02 21:59:13,332 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1912923174, now seen corresponding path program 1 times [2019-10-02 21:59:13,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:13,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:13,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:13,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:13,338 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:59:13,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:59:13,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:59:13,654 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:13,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:59:13,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:59:13,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:59:13,655 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-02 21:59:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:59:18,958 INFO L93 Difference]: Finished difference Result 2911 states and 4533 transitions. [2019-10-02 21:59:18,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:59:18,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-02 21:59:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:59:18,977 INFO L225 Difference]: With dead ends: 2911 [2019-10-02 21:59:18,978 INFO L226 Difference]: Without dead ends: 2911 [2019-10-02 21:59:18,978 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:59:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-02 21:59:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-02 21:59:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-02 21:59:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-02 21:59:19,076 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 155 [2019-10-02 21:59:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:59:19,078 INFO L475 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-02 21:59:19,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:59:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-02 21:59:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-02 21:59:19,081 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:19,082 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, 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] [2019-10-02 21:59:19,082 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash -775273618, now seen corresponding path program 1 times [2019-10-02 21:59:19,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:19,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:19,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:19,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:19,086 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:59:19,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:59:19,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:59:19,285 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:19,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:59:19,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:59:19,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:59:19,286 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-02 21:59:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:59:24,244 INFO L93 Difference]: Finished difference Result 3662 states and 5163 transitions. [2019-10-02 21:59:24,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:59:24,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-02 21:59:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:59:24,262 INFO L225 Difference]: With dead ends: 3662 [2019-10-02 21:59:24,262 INFO L226 Difference]: Without dead ends: 3662 [2019-10-02 21:59:24,263 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:59:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-02 21:59:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-02 21:59:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-02 21:59:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-02 21:59:24,333 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 159 [2019-10-02 21:59:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:59:24,334 INFO L475 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-02 21:59:24,334 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:59:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-02 21:59:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-02 21:59:24,337 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:24,338 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:59:24,338 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash -134030449, now seen corresponding path program 1 times [2019-10-02 21:59:24,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:24,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:24,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:24,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:24,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:59:24,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:59:24,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:59:24,556 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:24,557 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:59:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:59:24,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:59:24,558 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-02 21:59:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:59:30,046 INFO L93 Difference]: Finished difference Result 6768 states and 9269 transitions. [2019-10-02 21:59:30,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:59:30,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2019-10-02 21:59:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:59:30,083 INFO L225 Difference]: With dead ends: 6768 [2019-10-02 21:59:30,084 INFO L226 Difference]: Without dead ends: 6768 [2019-10-02 21:59:30,084 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 21:59:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-02 21:59:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-02 21:59:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-02 21:59:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-02 21:59:30,330 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 190 [2019-10-02 21:59:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:59:30,331 INFO L475 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-02 21:59:30,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:59:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-02 21:59:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-02 21:59:30,338 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:59:30,338 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, 3, 3, 3, 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] [2019-10-02 21:59:30,339 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:59:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:30,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1362369649, now seen corresponding path program 1 times [2019-10-02 21:59:30,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:59:30,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:30,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:59:30,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:59:30,342 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:59:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:59:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:59:30,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:59:30,514 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:59:30,516 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2019-10-02 21:59:30,518 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1951], [1959], [1967], [1975], [1983], [1991], [1999], [2007], [2015], [2019], [2021], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-10-02 21:59:30,600 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:59:30,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:59:34,305 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:59:34,307 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:59:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:59:34,312 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:59:37,832 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 78.38% of their original sizes. [2019-10-02 21:59:37,832 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:59:37,909 INFO L420 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2019-10-02 21:59:37,909 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:59:37,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:59:37,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 21:59:37,911 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:59:37,912 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 21:59:37,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 21:59:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 21:59:37,912 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 10 states. [2019-10-02 22:01:13,979 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.