java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:09:40,082 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:09:40,085 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:09:40,103 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:09:40,104 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:09:40,105 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:09:40,106 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:09:40,109 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:09:40,118 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:09:40,119 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:09:40,120 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:09:40,120 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:09:40,125 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:09:40,126 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:09:40,127 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:09:40,130 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:09:40,132 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:09:40,134 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:09:40,139 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:09:40,142 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:09:40,142 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:09:40,145 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:09:40,147 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:09:40,148 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:09:40,148 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:09:40,148 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:09:40,152 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:09:40,153 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:09:40,156 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:09:40,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:09:40,158 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:09:40,159 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:09:40,159 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:09:40,159 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:09:40,162 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:09:40,162 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:09:40,163 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:09:40,179 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:09:40,179 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:09:40,180 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:09:40,180 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:09:40,181 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:09:40,181 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:09:40,181 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:09:40,181 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:09:40,181 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:09:40,182 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:09:40,182 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:09:40,182 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:09:40,183 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:09:40,184 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:09:40,184 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:09:40,184 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:09:40,184 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:09:40,184 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:09:40,185 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:09:40,185 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:09:40,185 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:09:40,185 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:09:40,185 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:09:40,187 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:09:40,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:09:40,188 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:09:40,188 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:09:40,188 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:09:40,189 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:09:40,189 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:09:40,189 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:09:40,189 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:09:40,189 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:09:40,190 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:09:40,239 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:09:40,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:09:40,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:09:40,265 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:09:40,266 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:09:40,266 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-11-07 15:09:40,336 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb98702a/935aaa977a664d3ead816162b541aa0e/FLAGdd10dce55 [2018-11-07 15:09:41,011 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:09:41,012 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label19_true-unreach-call.c [2018-11-07 15:09:41,031 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb98702a/935aaa977a664d3ead816162b541aa0e/FLAGdd10dce55 [2018-11-07 15:09:41,047 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffb98702a/935aaa977a664d3ead816162b541aa0e [2018-11-07 15:09:41,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:09:41,061 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:09:41,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:09:41,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:09:41,067 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:09:41,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:09:41" (1/1) ... [2018-11-07 15:09:41,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54967387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:41, skipping insertion in model container [2018-11-07 15:09:41,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:09:41" (1/1) ... [2018-11-07 15:09:41,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:09:41,168 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:09:41,995 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:09:42,000 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:09:42,311 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:09:42,334 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:09:42,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42 WrapperNode [2018-11-07 15:09:42,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:09:42,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:09:42,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:09:42,337 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:09:42,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:09:42,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:09:42,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:09:42,563 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:09:42,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (1/1) ... [2018-11-07 15:09:42,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:09:42,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:09:42,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:09:42,742 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:09:42,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (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 [2018-11-07 15:09:42,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:09:42,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:09:42,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:09:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:09:42,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:09:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:09:42,810 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:09:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:09:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:09:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:09:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:09:48,274 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:09:48,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:09:48 BoogieIcfgContainer [2018-11-07 15:09:48,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:09:48,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:09:48,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:09:48,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:09:48,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:09:41" (1/3) ... [2018-11-07 15:09:48,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6985eb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:09:48, skipping insertion in model container [2018-11-07 15:09:48,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:09:42" (2/3) ... [2018-11-07 15:09:48,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6985eb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:09:48, skipping insertion in model container [2018-11-07 15:09:48,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:09:48" (3/3) ... [2018-11-07 15:09:48,283 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label19_true-unreach-call.c [2018-11-07 15:09:48,294 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:09:48,303 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:09:48,321 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:09:48,362 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:09:48,363 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:09:48,363 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:09:48,363 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:09:48,363 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:09:48,363 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:09:48,364 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:09:48,364 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:09:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 15:09:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-07 15:09:48,411 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:09:48,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:09:48,415 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:09:48,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:09:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1227807684, now seen corresponding path program 1 times [2018-11-07 15:09:48,424 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:09:48,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:09:48,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:09:48,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:09:48,474 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:09:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:09:48,940 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 15:09:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:09:48,970 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:09:48,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:09:48,971 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:09:48,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:09:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:09:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:09:48,999 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 15:09:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:09:55,935 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-11-07 15:09:55,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:09:55,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-11-07 15:09:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:09:55,964 INFO L225 Difference]: With dead ends: 1558 [2018-11-07 15:09:55,964 INFO L226 Difference]: Without dead ends: 1114 [2018-11-07 15:09:55,976 INFO L604 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 [2018-11-07 15:09:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-11-07 15:09:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-11-07 15:09:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-11-07 15:09:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-11-07 15:09:56,094 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 52 [2018-11-07 15:09:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:09:56,094 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-11-07 15:09:56,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:09:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-11-07 15:09:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-07 15:09:56,102 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:09:56,102 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, 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] [2018-11-07 15:09:56,103 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:09:56,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:09:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2018-11-07 15:09:56,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:09:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:09:56,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:09:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:09:56,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:09:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:09:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:09:56,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:09:56,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:09:56,378 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:09:56,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:09:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:09:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:09:56,380 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 5 states. [2018-11-07 15:10:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:05,662 INFO L93 Difference]: Finished difference Result 2506 states and 4577 transitions. [2018-11-07 15:10:05,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:10:05,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2018-11-07 15:10:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:05,687 INFO L225 Difference]: With dead ends: 2506 [2018-11-07 15:10:05,687 INFO L226 Difference]: Without dead ends: 1753 [2018-11-07 15:10:05,693 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:10:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2018-11-07 15:10:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1733. [2018-11-07 15:10:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2018-11-07 15:10:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3007 transitions. [2018-11-07 15:10:05,778 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3007 transitions. Word has length 122 [2018-11-07 15:10:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:05,779 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 3007 transitions. [2018-11-07 15:10:05,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:10:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3007 transitions. [2018-11-07 15:10:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-07 15:10:05,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:05,784 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, 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] [2018-11-07 15:10:05,784 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:05,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1495807734, now seen corresponding path program 1 times [2018-11-07 15:10:05,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:05,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:05,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:05,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:05,787 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:05,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:05,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:10:05,986 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:05,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:10:05,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:10:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:10:05,988 INFO L87 Difference]: Start difference. First operand 1733 states and 3007 transitions. Second operand 6 states. [2018-11-07 15:10:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:12,896 INFO L93 Difference]: Finished difference Result 5656 states and 10490 transitions. [2018-11-07 15:10:12,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 15:10:12,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2018-11-07 15:10:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:12,936 INFO L225 Difference]: With dead ends: 5656 [2018-11-07 15:10:12,936 INFO L226 Difference]: Without dead ends: 3929 [2018-11-07 15:10:12,962 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:10:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2018-11-07 15:10:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3821. [2018-11-07 15:10:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2018-11-07 15:10:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5796 transitions. [2018-11-07 15:10:13,103 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5796 transitions. Word has length 123 [2018-11-07 15:10:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:13,104 INFO L480 AbstractCegarLoop]: Abstraction has 3821 states and 5796 transitions. [2018-11-07 15:10:13,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:10:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5796 transitions. [2018-11-07 15:10:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 15:10:13,107 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:13,107 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, 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] [2018-11-07 15:10:13,108 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:13,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:13,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1360707218, now seen corresponding path program 1 times [2018-11-07 15:10:13,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:13,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:13,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:13,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:13,110 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:13,428 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:10:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:13,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:13,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:10:13,735 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:13,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:10:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:10:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:10:13,736 INFO L87 Difference]: Start difference. First operand 3821 states and 5796 transitions. Second operand 6 states. [2018-11-07 15:10:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:18,776 INFO L93 Difference]: Finished difference Result 10738 states and 17556 transitions. [2018-11-07 15:10:18,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:10:18,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-11-07 15:10:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:18,827 INFO L225 Difference]: With dead ends: 10738 [2018-11-07 15:10:18,827 INFO L226 Difference]: Without dead ends: 7232 [2018-11-07 15:10:18,867 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:10:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2018-11-07 15:10:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 7179. [2018-11-07 15:10:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7179 states. [2018-11-07 15:10:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7179 states to 7179 states and 10373 transitions. [2018-11-07 15:10:19,070 INFO L78 Accepts]: Start accepts. Automaton has 7179 states and 10373 transitions. Word has length 127 [2018-11-07 15:10:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:19,071 INFO L480 AbstractCegarLoop]: Abstraction has 7179 states and 10373 transitions. [2018-11-07 15:10:19,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:10:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7179 states and 10373 transitions. [2018-11-07 15:10:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-11-07 15:10:19,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:19,075 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, 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] [2018-11-07 15:10:19,076 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:19,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -507052443, now seen corresponding path program 1 times [2018-11-07 15:10:19,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:19,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:19,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:19,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:19,078 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:19,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:19,332 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:10:19,333 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 149 with the following transitions: [2018-11-07 15:10:19,335 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:10:19,385 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:10:19,386 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:10:19,915 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:10:21,606 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 15:10:21,608 INFO L272 AbstractInterpreter]: Visited 104 different actions 691 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 15:10:21,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:21,655 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 15:10:21,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:21,656 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 15:10:21,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:21,677 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 15:10:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:21,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 15:10:25,516 WARN L179 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 37 [2018-11-07 15:10:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:27,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 15:10:27,865 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-07 15:10:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:28,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 15:10:28,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-11-07 15:10:28,095 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:28,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:10:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:10:28,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 15:10:28,096 INFO L87 Difference]: Start difference. First operand 7179 states and 10373 transitions. Second operand 3 states. [2018-11-07 15:10:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:31,362 INFO L93 Difference]: Finished difference Result 17953 states and 27078 transitions. [2018-11-07 15:10:31,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:10:31,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2018-11-07 15:10:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:31,469 INFO L225 Difference]: With dead ends: 17953 [2018-11-07 15:10:31,469 INFO L226 Difference]: Without dead ends: 11089 [2018-11-07 15:10:31,556 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-07 15:10:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2018-11-07 15:10:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 11087. [2018-11-07 15:10:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11087 states. [2018-11-07 15:10:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11087 states to 11087 states and 15327 transitions. [2018-11-07 15:10:31,902 INFO L78 Accepts]: Start accepts. Automaton has 11087 states and 15327 transitions. Word has length 148 [2018-11-07 15:10:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:31,903 INFO L480 AbstractCegarLoop]: Abstraction has 11087 states and 15327 transitions. [2018-11-07 15:10:31,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:10:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11087 states and 15327 transitions. [2018-11-07 15:10:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-11-07 15:10:31,915 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:31,916 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, 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] [2018-11-07 15:10:31,916 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:31,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1797896167, now seen corresponding path program 1 times [2018-11-07 15:10:31,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:31,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:31,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:31,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:31,920 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:32,569 WARN L179 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-11-07 15:10:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:32,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:32,931 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:10:32,932 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-11-07 15:10:32,932 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1056], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:10:32,944 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:10:32,944 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:10:33,171 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:10:33,189 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:10:33,189 INFO L272 AbstractInterpreter]: Visited 172 different actions 172 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:10:33,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:33,227 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:10:33,665 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 77.95% of their original sizes. [2018-11-07 15:10:33,665 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:10:34,152 INFO L415 sIntCurrentIteration]: We unified 219 AI predicates to 219 [2018-11-07 15:10:34,152 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:10:34,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:10:34,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-11-07 15:10:34,154 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:34,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 15:10:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 15:10:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:10:34,156 INFO L87 Difference]: Start difference. First operand 11087 states and 15327 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown