java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:03:42,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:03:42,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:03:42,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:03:42,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:03:42,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:03:42,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:03:42,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:03:42,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:03:42,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:03:42,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:03:42,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:03:42,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:03:42,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:03:42,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:03:42,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:03:42,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 19:03:42,964 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 19:03:42,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:03:42,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:03:42,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:03:42,980 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:03:42,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:03:42,980 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:03:42,981 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:03:42,981 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:03:42,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:03:42,981 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:03:42,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:03:42,982 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:03:42,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:03:42,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:03:42,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:03:42,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:03:42,984 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:03:42,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:03:42,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:03:42,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:03:42,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:03:42,985 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:03:42,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:03:42,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:03:42,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:03:43,014 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:03:43,026 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:03:43,030 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:03:43,031 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:03:43,033 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:03:43,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label36.c [2019-10-02 19:03:43,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6098c1e7/288fac7123734a40a3d0aa7bad6ea9f8/FLAG4cc8aa6f9 [2019-10-02 19:03:43,719 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:03:43,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label36.c [2019-10-02 19:03:43,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6098c1e7/288fac7123734a40a3d0aa7bad6ea9f8/FLAG4cc8aa6f9 [2019-10-02 19:03:43,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6098c1e7/288fac7123734a40a3d0aa7bad6ea9f8 [2019-10-02 19:03:43,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:03:43,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:03:43,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:03:43,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:03:43,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:03:43,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:03:43" (1/1) ... [2019-10-02 19:03:43,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8c4659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:43, skipping insertion in model container [2019-10-02 19:03:43,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:03:43" (1/1) ... [2019-10-02 19:03:44,004 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:03:44,068 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:03:44,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:03:44,621 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:03:44,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:03:44,756 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:03:44,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44 WrapperNode [2019-10-02 19:03:44,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:03:44,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:03:44,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:03:44,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:03:44,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (1/1) ... [2019-10-02 19:03:44,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:03:44,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:03:44,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:03:44,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:03:44,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (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 19:03:44,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:03:44,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:03:44,977 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:03:44,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:03:44,978 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:03:44,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:03:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:03:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:03:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:03:44,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:03:44,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:03:46,219 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:03:46,220 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:03:46,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:03:46 BoogieIcfgContainer [2019-10-02 19:03:46,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:03:46,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:03:46,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:03:46,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:03:46,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:03:43" (1/3) ... [2019-10-02 19:03:46,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e412dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:03:46, skipping insertion in model container [2019-10-02 19:03:46,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:03:44" (2/3) ... [2019-10-02 19:03:46,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e412dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:03:46, skipping insertion in model container [2019-10-02 19:03:46,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:03:46" (3/3) ... [2019-10-02 19:03:46,230 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label36.c [2019-10-02 19:03:46,239 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:03:46,248 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:03:46,265 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:03:46,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:03:46,292 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:03:46,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:03:46,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:03:46,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:03:46,293 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:03:46,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:03:46,293 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:03:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:03:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 19:03:46,326 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:03:46,328 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] [2019-10-02 19:03:46,330 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:03:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:03:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1093393358, now seen corresponding path program 1 times [2019-10-02 19:03:46,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:03:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:46,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:03:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:46,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:03:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:03:46,654 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 19:03:46,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:03:46,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:03:46,657 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:03:46,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:03:46,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:03:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:03:46,683 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 19:03:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:03:47,868 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-10-02 19:03:47,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:03:47,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-10-02 19:03:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:03:47,888 INFO L225 Difference]: With dead ends: 362 [2019-10-02 19:03:47,888 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 19:03:47,890 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 19:03:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 19:03:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 19:03:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:03:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-02 19:03:47,968 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 45 [2019-10-02 19:03:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:03:47,969 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-02 19:03:47,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:03:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-02 19:03:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-02 19:03:47,979 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:03:47,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:47,980 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:03:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:03:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1968204002, now seen corresponding path program 1 times [2019-10-02 19:03:47,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:03:47,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:47,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:03:47,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:47,984 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:03:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:03:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:03:48,236 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:03:48,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 19:03:48,236 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:03:48,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 19:03:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 19:03:48,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 19:03:48,239 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-02 19:03:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:03:49,340 INFO L93 Difference]: Finished difference Result 602 states and 882 transitions. [2019-10-02 19:03:49,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 19:03:49,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2019-10-02 19:03:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:03:49,346 INFO L225 Difference]: With dead ends: 602 [2019-10-02 19:03:49,347 INFO L226 Difference]: Without dead ends: 602 [2019-10-02 19:03:49,348 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 19:03:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-10-02 19:03:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 592. [2019-10-02 19:03:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-02 19:03:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 867 transitions. [2019-10-02 19:03:49,394 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 867 transitions. Word has length 127 [2019-10-02 19:03:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:03:49,394 INFO L475 AbstractCegarLoop]: Abstraction has 592 states and 867 transitions. [2019-10-02 19:03:49,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 19:03:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 867 transitions. [2019-10-02 19:03:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-02 19:03:49,400 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:03:49,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:49,400 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:03:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:03:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1459382270, now seen corresponding path program 1 times [2019-10-02 19:03:49,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:03:49,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:49,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:03:49,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:49,403 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:03:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:03:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:03:49,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:03:49,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:03:49,634 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:03:49,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:03:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:03:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:03:49,635 INFO L87 Difference]: Start difference. First operand 592 states and 867 transitions. Second operand 6 states. [2019-10-02 19:03:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:03:50,531 INFO L93 Difference]: Finished difference Result 904 states and 1346 transitions. [2019-10-02 19:03:50,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:03:50,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-02 19:03:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:03:50,539 INFO L225 Difference]: With dead ends: 904 [2019-10-02 19:03:50,539 INFO L226 Difference]: Without dead ends: 904 [2019-10-02 19:03:50,540 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 19:03:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-10-02 19:03:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 890. [2019-10-02 19:03:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-02 19:03:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1300 transitions. [2019-10-02 19:03:50,598 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1300 transitions. Word has length 143 [2019-10-02 19:03:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:03:50,605 INFO L475 AbstractCegarLoop]: Abstraction has 890 states and 1300 transitions. [2019-10-02 19:03:50,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:03:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1300 transitions. [2019-10-02 19:03:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-02 19:03:50,613 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:03:50,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:03:50,615 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:03:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:03:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1396859214, now seen corresponding path program 1 times [2019-10-02 19:03:50,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:03:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:50,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:03:50,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:50,617 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:03:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:03:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:03:50,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:03:50,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:03:50,851 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:03:50,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:03:50,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:03:50,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:03:50,854 INFO L87 Difference]: Start difference. First operand 890 states and 1300 transitions. Second operand 6 states. [2019-10-02 19:03:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:03:51,869 INFO L93 Difference]: Finished difference Result 1220 states and 1719 transitions. [2019-10-02 19:03:51,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:03:51,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2019-10-02 19:03:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:03:51,878 INFO L225 Difference]: With dead ends: 1220 [2019-10-02 19:03:51,878 INFO L226 Difference]: Without dead ends: 1220 [2019-10-02 19:03:51,879 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 19:03:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-10-02 19:03:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1192. [2019-10-02 19:03:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-02 19:03:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1616 transitions. [2019-10-02 19:03:51,914 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1616 transitions. Word has length 167 [2019-10-02 19:03:51,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:03:51,915 INFO L475 AbstractCegarLoop]: Abstraction has 1192 states and 1616 transitions. [2019-10-02 19:03:51,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:03:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1616 transitions. [2019-10-02 19:03:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-02 19:03:51,919 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:03:51,919 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:03:51,920 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:03:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:03:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1882645595, now seen corresponding path program 1 times [2019-10-02 19:03:51,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:03:51,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:51,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:03:51,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:03:51,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:03:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:03:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:03:52,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:03:52,445 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:03:52,446 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2019-10-02 19:03:52,448 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [546], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:03:52,510 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:03:52,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:04:04,172 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:04:20,255 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:04:20,258 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 16. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:04:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:20,264 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:04:41,627 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 73.25% of their original sizes. [2019-10-02 19:04:41,627 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:04:41,700 INFO L420 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2019-10-02 19:04:41,700 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:04:41,701 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:04:41,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-10-02 19:04:41,702 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:41,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:04:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:04:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:04:41,703 INFO L87 Difference]: Start difference. First operand 1192 states and 1616 transitions. Second operand 11 states. [2019-10-02 19:07:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:07:50,799 INFO L93 Difference]: Finished difference Result 1502 states and 1945 transitions. [2019-10-02 19:07:50,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:07:50,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 206 [2019-10-02 19:07:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:07:50,810 INFO L225 Difference]: With dead ends: 1502 [2019-10-02 19:07:50,811 INFO L226 Difference]: Without dead ends: 1502 [2019-10-02 19:07:50,811 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 19:07:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2019-10-02 19:07:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1335. [2019-10-02 19:07:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1335 states. [2019-10-02 19:07:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1766 transitions. [2019-10-02 19:07:50,854 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1766 transitions. Word has length 206 [2019-10-02 19:07:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:07:50,855 INFO L475 AbstractCegarLoop]: Abstraction has 1335 states and 1766 transitions. [2019-10-02 19:07:50,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 19:07:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1766 transitions. [2019-10-02 19:07:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-10-02 19:07:50,860 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:07:50,860 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:07:50,860 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:07:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:07:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1936663251, now seen corresponding path program 1 times [2019-10-02 19:07:50,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:07:50,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:07:50,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:07:50,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:07:50,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:07:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:07:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:07:51,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:07:51,051 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:07:51,052 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 243 with the following transitions: [2019-10-02 19:07:51,052 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:07:51,057 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:07:51,058 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:08:23,251 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:09:23,470 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:09:23,471 INFO L272 AbstractInterpreter]: Visited 123 different actions 240 times. Merged at 4 different actions 4 times. Never widened. Performed 464 root evaluator evaluations with a maximum evaluation depth of 16. Performed 464 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:09:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:09:23,471 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:10:29,965 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 73.17% of their original sizes. [2019-10-02 19:10:29,965 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:10:30,091 INFO L420 sIntCurrentIteration]: We unified 241 AI predicates to 241 [2019-10-02 19:10:30,091 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:10:30,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:10:30,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-10-02 19:10:30,092 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:10:30,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 19:10:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 19:10:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-02 19:10:30,093 INFO L87 Difference]: Start difference. First operand 1335 states and 1766 transitions. Second operand 12 states. [2019-10-02 19:15:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:15:36,922 INFO L93 Difference]: Finished difference Result 1627 states and 2081 transitions. [2019-10-02 19:15:36,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 19:15:36,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 242 [2019-10-02 19:15:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:15:36,933 INFO L225 Difference]: With dead ends: 1627 [2019-10-02 19:15:36,933 INFO L226 Difference]: Without dead ends: 1627 [2019-10-02 19:15:36,934 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-02 19:15:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-02 19:15:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1623. [2019-10-02 19:15:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1623 states. [2019-10-02 19:15:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2077 transitions. [2019-10-02 19:15:36,979 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2077 transitions. Word has length 242 [2019-10-02 19:15:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:15:36,980 INFO L475 AbstractCegarLoop]: Abstraction has 1623 states and 2077 transitions. [2019-10-02 19:15:36,980 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 19:15:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2077 transitions. [2019-10-02 19:15:36,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-02 19:15:36,986 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:15:36,986 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 19:15:36,987 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:15:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:15:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1576814622, now seen corresponding path program 1 times [2019-10-02 19:15:36,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:15:36,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:15:36,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:15:36,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:15:36,989 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:15:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:15:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-02 19:15:37,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:15:37,320 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:15:37,320 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2019-10-02 19:15:37,322 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:15:37,333 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:15:37,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:17:37,366 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:17:37,367 INFO L272 AbstractInterpreter]: Visited 142 different actions 278 times. Merged at 4 different actions 4 times. Never widened. Performed 488 root evaluator evaluations with a maximum evaluation depth of 16. Performed 488 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:17:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:17:37,367 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates