java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:19:34,129 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:19:34,131 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:19:34,152 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:19:34,152 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:19:34,154 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:19:34,156 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:19:34,158 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:19:34,161 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:19:34,161 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:19:34,170 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:19:34,170 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:19:34,173 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:19:34,176 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:19:34,178 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:19:34,179 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:19:34,181 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:19:34,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:19:34,188 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:19:34,192 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:19:34,193 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:19:34,194 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:19:34,197 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:19:34,205 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:19:34,205 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:19:34,206 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:19:34,207 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:19:34,208 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:19:34,229 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:19:34,229 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:19:34,230 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:19:34,230 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:19:34,230 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:19:34,231 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:19:34,231 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:19:34,231 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:19:34,231 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:19:34,231 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:19:34,232 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:19:34,232 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:19:34,233 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:19:34,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:19:34,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:19:34,233 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:19:34,233 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:19:34,233 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:19:34,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:19:34,234 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:19:34,234 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:19:34,234 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:19:34,235 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:19:34,235 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:19:34,235 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:19:34,235 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:19:34,235 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:19:34,236 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:19:34,236 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:19:34,236 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:19:34,236 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:19:34,236 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:19:34,237 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:19:34,237 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:19:34,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:19:34,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:19:34,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:19:34,305 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:19:34,306 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:19:34,306 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c [2018-10-24 18:19:34,367 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74704cf68/88d0fd49f9dd4505a30640e6f9acc23f/FLAG0320681b4 [2018-10-24 18:19:35,124 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:19:35,125 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label42_false-unreach-call.c [2018-10-24 18:19:35,160 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74704cf68/88d0fd49f9dd4505a30640e6f9acc23f/FLAG0320681b4 [2018-10-24 18:19:35,181 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/74704cf68/88d0fd49f9dd4505a30640e6f9acc23f [2018-10-24 18:19:35,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:19:35,197 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:19:35,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:19:35,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:19:35,207 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:19:35,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:19:35" (1/1) ... [2018-10-24 18:19:35,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9fd423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:35, skipping insertion in model container [2018-10-24 18:19:35,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:19:35" (1/1) ... [2018-10-24 18:19:35,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:19:35,387 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:19:36,644 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:19:36,649 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:19:37,228 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:19:37,264 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:19:37,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37 WrapperNode [2018-10-24 18:19:37,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:19:37,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:19:37,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:19:37,266 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:19:37,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:19:37,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:19:37,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:19:37,745 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:19:37,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:37,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:38,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... [2018-10-24 18:19:38,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:19:38,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:19:38,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:19:38,045 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:19:38,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 18:19:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:19:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:19:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 18:19:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 18:19:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 18:19:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 18:19:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:19:38,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:19:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:19:38,128 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:19:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:19:38,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:19:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:19:38,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:19:51,461 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:19:51,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:19:51 BoogieIcfgContainer [2018-10-24 18:19:51,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:19:51,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:19:51,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:19:51,467 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:19:51,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:19:35" (1/3) ... [2018-10-24 18:19:51,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2257cc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:19:51, skipping insertion in model container [2018-10-24 18:19:51,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:19:37" (2/3) ... [2018-10-24 18:19:51,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2257cc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:19:51, skipping insertion in model container [2018-10-24 18:19:51,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:19:51" (3/3) ... [2018-10-24 18:19:51,471 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label42_false-unreach-call.c [2018-10-24 18:19:51,480 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:19:51,491 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:19:51,511 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:19:51,572 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:19:51,572 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:19:51,573 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:19:51,573 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:19:51,573 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:19:51,573 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:19:51,573 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:19:51,573 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:19:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states. [2018-10-24 18:19:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-24 18:19:51,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:19:51,641 INFO L375 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] [2018-10-24 18:19:51,643 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:19:51,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:19:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -206959357, now seen corresponding path program 1 times [2018-10-24 18:19:51,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:19:51,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:19:51,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:19:51,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:19:51,702 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:19:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:19:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:19:52,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:19:52,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:19:52,100 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:19:52,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:19:52,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:19:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:19:52,129 INFO L87 Difference]: Start difference. First operand 840 states. Second operand 4 states. [2018-10-24 18:20:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:20:06,800 INFO L93 Difference]: Finished difference Result 3234 states and 6255 transitions. [2018-10-24 18:20:06,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:20:06,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-24 18:20:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:20:06,852 INFO L225 Difference]: With dead ends: 3234 [2018-10-24 18:20:06,855 INFO L226 Difference]: Without dead ends: 2388 [2018-10-24 18:20:06,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:20:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2018-10-24 18:20:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 2388. [2018-10-24 18:20:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2388 states. [2018-10-24 18:20:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 3845 transitions. [2018-10-24 18:20:07,100 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 3845 transitions. Word has length 33 [2018-10-24 18:20:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:20:07,101 INFO L481 AbstractCegarLoop]: Abstraction has 2388 states and 3845 transitions. [2018-10-24 18:20:07,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:20:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 3845 transitions. [2018-10-24 18:20:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-24 18:20:07,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:20:07,108 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:20:07,109 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:20:07,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1266626407, now seen corresponding path program 1 times [2018-10-24 18:20:07,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:20:07,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:07,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:20:07,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:07,111 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:20:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:20:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:20:07,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:20:07,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:20:07,528 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:20:07,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:20:07,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:20:07,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:20:07,531 INFO L87 Difference]: Start difference. First operand 2388 states and 3845 transitions. Second operand 6 states. [2018-10-24 18:20:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:20:24,515 INFO L93 Difference]: Finished difference Result 9463 states and 15573 transitions. [2018-10-24 18:20:24,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:20:24,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-10-24 18:20:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:20:24,561 INFO L225 Difference]: With dead ends: 9463 [2018-10-24 18:20:24,561 INFO L226 Difference]: Without dead ends: 7081 [2018-10-24 18:20:24,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:20:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2018-10-24 18:20:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 7037. [2018-10-24 18:20:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7037 states. [2018-10-24 18:20:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 10229 transitions. [2018-10-24 18:20:24,785 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 10229 transitions. Word has length 114 [2018-10-24 18:20:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:20:24,785 INFO L481 AbstractCegarLoop]: Abstraction has 7037 states and 10229 transitions. [2018-10-24 18:20:24,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:20:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 10229 transitions. [2018-10-24 18:20:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-24 18:20:24,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:20:24,793 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:20:24,794 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:20:24,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1753618293, now seen corresponding path program 1 times [2018-10-24 18:20:24,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:20:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:24,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:20:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:24,796 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:20:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:20:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:20:25,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:20:25,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:20:25,057 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:20:25,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:20:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:20:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:20:25,058 INFO L87 Difference]: Start difference. First operand 7037 states and 10229 transitions. Second operand 6 states. [2018-10-24 18:20:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:20:32,665 INFO L93 Difference]: Finished difference Result 19057 states and 29212 transitions. [2018-10-24 18:20:32,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:20:32,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-10-24 18:20:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:20:32,744 INFO L225 Difference]: With dead ends: 19057 [2018-10-24 18:20:32,744 INFO L226 Difference]: Without dead ends: 12026 [2018-10-24 18:20:32,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:20:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2018-10-24 18:20:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 11931. [2018-10-24 18:20:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11931 states. [2018-10-24 18:20:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11931 states to 11931 states and 17450 transitions. [2018-10-24 18:20:33,128 INFO L78 Accepts]: Start accepts. Automaton has 11931 states and 17450 transitions. Word has length 144 [2018-10-24 18:20:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:20:33,129 INFO L481 AbstractCegarLoop]: Abstraction has 11931 states and 17450 transitions. [2018-10-24 18:20:33,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:20:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11931 states and 17450 transitions. [2018-10-24 18:20:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 18:20:33,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:20:33,133 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:20:33,134 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:20:33,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:33,134 INFO L82 PathProgramCache]: Analyzing trace with hash -988321524, now seen corresponding path program 1 times [2018-10-24 18:20:33,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:20:33,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:33,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:20:33,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:33,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:20:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:20:33,449 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:20:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:20:33,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:20:33,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:20:33,545 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:20:33,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:20:33,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:20:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:20:33,547 INFO L87 Difference]: Start difference. First operand 11931 states and 17450 transitions. Second operand 6 states. [2018-10-24 18:20:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:20:49,483 INFO L93 Difference]: Finished difference Result 37661 states and 58072 transitions. [2018-10-24 18:20:49,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:20:49,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2018-10-24 18:20:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:20:49,629 INFO L225 Difference]: With dead ends: 37661 [2018-10-24 18:20:49,629 INFO L226 Difference]: Without dead ends: 25736 [2018-10-24 18:20:49,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:20:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25736 states. [2018-10-24 18:20:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25736 to 25635. [2018-10-24 18:20:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25635 states. [2018-10-24 18:20:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25635 states to 25635 states and 38010 transitions. [2018-10-24 18:20:50,360 INFO L78 Accepts]: Start accepts. Automaton has 25635 states and 38010 transitions. Word has length 147 [2018-10-24 18:20:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:20:50,360 INFO L481 AbstractCegarLoop]: Abstraction has 25635 states and 38010 transitions. [2018-10-24 18:20:50,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:20:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 25635 states and 38010 transitions. [2018-10-24 18:20:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-24 18:20:50,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:20:50,368 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:20:50,369 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:20:50,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:20:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 649593825, now seen corresponding path program 1 times [2018-10-24 18:20:50,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:20:50,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:50,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:20:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:20:50,374 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:20:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:20:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:20:50,941 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:20:50,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:20:50,942 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:20:50,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:20:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:20:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:20:50,946 INFO L87 Difference]: Start difference. First operand 25635 states and 38010 transitions. Second operand 4 states. [2018-10-24 18:21:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:21:03,310 INFO L93 Difference]: Finished difference Result 76817 states and 117652 transitions. [2018-10-24 18:21:03,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:21:03,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2018-10-24 18:21:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:21:03,517 INFO L225 Difference]: With dead ends: 76817 [2018-10-24 18:21:03,518 INFO L226 Difference]: Without dead ends: 51188 [2018-10-24 18:21:03,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:21:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51188 states. [2018-10-24 18:21:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51188 to 51178. [2018-10-24 18:21:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51178 states. [2018-10-24 18:21:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51178 states to 51178 states and 71067 transitions. [2018-10-24 18:21:04,931 INFO L78 Accepts]: Start accepts. Automaton has 51178 states and 71067 transitions. Word has length 182 [2018-10-24 18:21:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:21:04,932 INFO L481 AbstractCegarLoop]: Abstraction has 51178 states and 71067 transitions. [2018-10-24 18:21:04,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:21:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51178 states and 71067 transitions. [2018-10-24 18:21:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-24 18:21:04,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:21:04,954 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 18:21:04,955 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:21:04,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:21:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1136426607, now seen corresponding path program 1 times [2018-10-24 18:21:04,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:21:04,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:21:04,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:21:04,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:21:04,956 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:21:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:21:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 52 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 18:21:05,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:21:05,328 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:21:05,329 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-10-24 18:21:05,335 INFO L202 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2031], [2033], [2036], [2044], [2052], [2060], [2068], [2076], [2084], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2500], [2501], [2505], [2509], [2513], [2517], [2521], [2524], [3240], [3244], [3248], [3254], [3258], [3260], [3271], [3272], [3273], [3275], [3276] [2018-10-24 18:21:05,438 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:21:05,438 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:21:09,612 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:21:13,752 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:21:13,754 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 18:21:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:21:13,798 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:21:17,241 INFO L232 lantSequenceWeakener]: Weakened 241 states. On average, predicates are now at 75.29% of their original sizes. [2018-10-24 18:21:17,242 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:21:17,657 INFO L413 sIntCurrentIteration]: We have 248 unified AI predicates [2018-10-24 18:21:17,658 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:21:17,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:21:17,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2018-10-24 18:21:17,659 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:21:17,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 18:21:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 18:21:17,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 18:21:17,661 INFO L87 Difference]: Start difference. First operand 51178 states and 71067 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown