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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:02:35,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:02:35,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:02:35,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 20:02:35,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 20:02:35,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 20:02:35,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 20:02:35,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 20:02:35,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 20:02:35,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 20:02:35,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 20:02:35,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 20:02:35,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:02:35,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:02:35,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:02:35,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:02:35,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:02:35,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:02:35,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:02:35,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:02:35,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:02:35,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:02:35,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:02:35,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:02:35,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 20:02:35,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 20:02:35,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 20:02:35,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 20:02:35,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 20:02:35,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 20:02:35,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:02:35,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:02:35,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:02:35,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:02:35,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:02:35,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:02:35,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:02:35,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:02:35,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:02:35,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:02:35,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:02:35,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 20:02:35,218 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:02:35,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:02:35,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:02:35,219 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:02:35,220 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:02:35,220 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:02:35,220 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:02:35,222 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:02:35,223 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:02:35,224 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:02:35,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:02:35,228 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:02:35,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:02:35,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:02:35,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:02:35,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:02:35,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:02:35,229 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:02:35,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:02:35,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:02:35,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:02:35,230 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:02:35,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:02:35,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:02:35,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:02:35,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:02:35,233 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:02:35,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:02:35,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:02:35,233 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:02:35,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:02:35,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:02:35,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:02:35,303 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:02:35,304 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:02:35,304 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-09-09 20:02:35,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9339fa90a/8a5007a82f824298b7f164c7bfb14753/FLAG456e1c809 [2019-09-09 20:02:36,023 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:02:36,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-09-09 20:02:36,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9339fa90a/8a5007a82f824298b7f164c7bfb14753/FLAG456e1c809 [2019-09-09 20:02:36,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9339fa90a/8a5007a82f824298b7f164c7bfb14753 [2019-09-09 20:02:36,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:02:36,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:02:36,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:02:36,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:02:36,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:02:36,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:02:36" (1/1) ... [2019-09-09 20:02:36,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62cb8da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:36, skipping insertion in model container [2019-09-09 20:02:36,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:02:36" (1/1) ... [2019-09-09 20:02:36,220 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:02:36,308 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:02:37,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:02:37,406 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:02:37,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:02:37,662 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:02:37,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37 WrapperNode [2019-09-09 20:02:37,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:02:37,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:02:37,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:02:37,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:02:37,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... [2019-09-09 20:02:37,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:02:37,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:02:37,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:02:37,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:02:37,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:02:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:02:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:02:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:02:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:02:37,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:02:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:02:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:02:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:02:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:02:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:02:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:02:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:02:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:02:40,649 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:02:40,650 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:02:40,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:02:40 BoogieIcfgContainer [2019-09-09 20:02:40,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:02:40,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:02:40,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:02:40,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:02:40,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:02:36" (1/3) ... [2019-09-09 20:02:40,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2dc567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:02:40, skipping insertion in model container [2019-09-09 20:02:40,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:02:37" (2/3) ... [2019-09-09 20:02:40,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2dc567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:02:40, skipping insertion in model container [2019-09-09 20:02:40,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:02:40" (3/3) ... [2019-09-09 20:02:40,662 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-09-09 20:02:40,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:02:40,682 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:02:40,706 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:02:40,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:02:40,741 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:02:40,741 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:02:40,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:02:40,742 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:02:40,742 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:02:40,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:02:40,742 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:02:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:02:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-09 20:02:40,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:40,784 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:40,787 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-09-09 20:02:40,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:40,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:40,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:40,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:40,871 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:02:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:02:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:02:41,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:02:41,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:02:41,107 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:02:41,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:02:41,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:02:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:02:41,132 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:02:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:02:44,224 INFO L93 Difference]: Finished difference Result 750 states and 1263 transitions. [2019-09-09 20:02:44,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:02:44,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-09-09 20:02:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:02:44,250 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:02:44,250 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:02:44,252 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:02:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:02:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:02:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:02:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-09-09 20:02:44,356 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 48 [2019-09-09 20:02:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:02:44,357 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-09-09 20:02:44,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:02:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-09-09 20:02:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 20:02:44,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:44,364 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:44,364 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-09-09 20:02:44,365 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:44,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:44,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:44,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:44,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:02:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:02:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:02:44,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:02:44,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:02:44,659 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:02:44,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:02:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:02:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:02:44,663 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-09-09 20:02:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:02:49,936 INFO L93 Difference]: Finished difference Result 2132 states and 3535 transitions. [2019-09-09 20:02:49,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 20:02:49,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 20:02:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:02:49,966 INFO L225 Difference]: With dead ends: 2132 [2019-09-09 20:02:49,966 INFO L226 Difference]: Without dead ends: 2132 [2019-09-09 20:02:49,967 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 20:02:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2019-09-09 20:02:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2087. [2019-09-09 20:02:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-09-09 20:02:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-09-09 20:02:50,072 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 123 [2019-09-09 20:02:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:02:50,073 INFO L475 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-09-09 20:02:50,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:02:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-09-09 20:02:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 20:02:50,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:50,077 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:50,077 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-09-09 20:02:50,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:50,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:50,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:50,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:50,080 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:02:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:02:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:02:50,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:02:50,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:02:50,268 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:02:50,270 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:02:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:02:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:02:50,271 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-09-09 20:02:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:02:53,351 INFO L93 Difference]: Finished difference Result 3542 states and 5895 transitions. [2019-09-09 20:02:53,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 20:02:53,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-09-09 20:02:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:02:53,388 INFO L225 Difference]: With dead ends: 3542 [2019-09-09 20:02:53,390 INFO L226 Difference]: Without dead ends: 3542 [2019-09-09 20:02:53,394 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-09 20:02:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-09-09 20:02:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-09-09 20:02:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-09-09 20:02:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5697 transitions. [2019-09-09 20:02:53,565 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5697 transitions. Word has length 127 [2019-09-09 20:02:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:02:53,568 INFO L475 AbstractCegarLoop]: Abstraction has 3503 states and 5697 transitions. [2019-09-09 20:02:53,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:02:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5697 transitions. [2019-09-09 20:02:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 20:02:53,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:53,581 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:53,582 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:53,582 INFO L82 PathProgramCache]: Analyzing trace with hash 939099681, now seen corresponding path program 1 times [2019-09-09 20:02:53,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:53,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:53,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:53,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:53,584 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:02:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:02:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:02:53,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:02:53,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:02:53,834 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:02:53,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:02:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:02:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:02:53,836 INFO L87 Difference]: Start difference. First operand 3503 states and 5697 transitions. Second operand 6 states. [2019-09-09 20:02:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:02:56,448 INFO L93 Difference]: Finished difference Result 4320 states and 7018 transitions. [2019-09-09 20:02:56,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:02:56,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-09-09 20:02:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:02:56,479 INFO L225 Difference]: With dead ends: 4320 [2019-09-09 20:02:56,479 INFO L226 Difference]: Without dead ends: 4320 [2019-09-09 20:02:56,481 INFO L628 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 [2019-09-09 20:02:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2019-09-09 20:02:56,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4279. [2019-09-09 20:02:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2019-09-09 20:02:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6768 transitions. [2019-09-09 20:02:56,658 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6768 transitions. Word has length 129 [2019-09-09 20:02:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:02:56,660 INFO L475 AbstractCegarLoop]: Abstraction has 4279 states and 6768 transitions. [2019-09-09 20:02:56,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:02:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6768 transitions. [2019-09-09 20:02:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-09 20:02:56,663 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:56,663 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:56,664 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1902020488, now seen corresponding path program 1 times [2019-09-09 20:02:56,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:56,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:56,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:56,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:56,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:02:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:02:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:02:56,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:02:56,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:02:56,866 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:02:56,867 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:02:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:02:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:02:56,868 INFO L87 Difference]: Start difference. First operand 4279 states and 6768 transitions. Second operand 6 states. [2019-09-09 20:02:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:02:59,669 INFO L93 Difference]: Finished difference Result 7390 states and 11034 transitions. [2019-09-09 20:02:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:02:59,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 132 [2019-09-09 20:02:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:02:59,714 INFO L225 Difference]: With dead ends: 7390 [2019-09-09 20:02:59,715 INFO L226 Difference]: Without dead ends: 7390 [2019-09-09 20:02:59,715 INFO L628 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 [2019-09-09 20:02:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2019-09-09 20:02:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7362. [2019-09-09 20:02:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7362 states. [2019-09-09 20:02:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 10905 transitions. [2019-09-09 20:02:59,981 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 10905 transitions. Word has length 132 [2019-09-09 20:02:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:02:59,981 INFO L475 AbstractCegarLoop]: Abstraction has 7362 states and 10905 transitions. [2019-09-09 20:02:59,982 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:02:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 10905 transitions. [2019-09-09 20:02:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-09 20:02:59,983 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:02:59,984 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:02:59,984 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:02:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:02:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1440393839, now seen corresponding path program 1 times [2019-09-09 20:02:59,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:02:59,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:59,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:02:59,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:02:59,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:00,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:00,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:03:00,096 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:00,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:03:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:03:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:03:00,097 INFO L87 Difference]: Start difference. First operand 7362 states and 10905 transitions. Second operand 6 states. [2019-09-09 20:03:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:03,001 INFO L93 Difference]: Finished difference Result 8777 states and 11868 transitions. [2019-09-09 20:03:03,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:03:03,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-09-09 20:03:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:03,041 INFO L225 Difference]: With dead ends: 8777 [2019-09-09 20:03:03,041 INFO L226 Difference]: Without dead ends: 8777 [2019-09-09 20:03:03,041 INFO L628 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 [2019-09-09 20:03:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2019-09-09 20:03:03,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7746. [2019-09-09 20:03:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7746 states. [2019-09-09 20:03:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10527 transitions. [2019-09-09 20:03:03,240 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10527 transitions. Word has length 137 [2019-09-09 20:03:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:03,241 INFO L475 AbstractCegarLoop]: Abstraction has 7746 states and 10527 transitions. [2019-09-09 20:03:03,241 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:03:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10527 transitions. [2019-09-09 20:03:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-09 20:03:03,242 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:03,243 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:03,243 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash -37681811, now seen corresponding path program 1 times [2019-09-09 20:03:03,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:03,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:03,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:03,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:03,245 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 20:03:03,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:03:03,335 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:03:03,336 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 140 with the following transitions: [2019-09-09 20:03:03,338 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [471], [473], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:03:03,389 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:03:03,389 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:03:08,566 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 20:03:11,082 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:03:11,085 INFO L272 AbstractInterpreter]: Visited 98 different actions 191 times. Merged at 4 different actions 5 times. Never widened. Performed 444 root evaluator evaluations with a maximum evaluation depth of 14. Performed 444 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 20:03:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:11,091 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:03:13,383 INFO L227 lantSequenceWeakener]: Weakened 136 states. On average, predicates are now at 78.22% of their original sizes. [2019-09-09 20:03:13,383 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:03:13,502 INFO L420 sIntCurrentIteration]: We unified 138 AI predicates to 138 [2019-09-09 20:03:13,502 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:03:13,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:03:13,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 20:03:13,504 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:13,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:03:13,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:03:13,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:03:13,508 INFO L87 Difference]: Start difference. First operand 7746 states and 10527 transitions. Second operand 11 states.