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_label20_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:09:59,028 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:09:59,031 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:09:59,047 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:09:59,048 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:09:59,049 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:09:59,051 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:09:59,053 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:09:59,056 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:09:59,057 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:09:59,059 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:09:59,060 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:09:59,060 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:09:59,061 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:09:59,062 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:09:59,063 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:09:59,071 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:09:59,073 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:09:59,078 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:09:59,082 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:09:59,083 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:09:59,086 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:09:59,090 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:09:59,090 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:09:59,091 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:09:59,091 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:09:59,095 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:09:59,096 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:09:59,096 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:09:59,098 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:09:59,098 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:09:59,100 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:09:59,101 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:09:59,101 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:09:59,103 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:09:59,104 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:09:59,104 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 15:09:59,129 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:09:59,129 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:09:59,131 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:09:59,133 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:09:59,134 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:09:59,134 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:09:59,134 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:09:59,134 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:09:59,134 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:09:59,135 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:09:59,135 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:09:59,135 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:09:59,136 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:09:59,137 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:09:59,137 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:09:59,137 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:09:59,137 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:09:59,138 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:09:59,138 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:09:59,138 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:09:59,138 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:09:59,141 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:09:59,141 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:09:59,141 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:09:59,141 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:09:59,142 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:09:59,142 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:09:59,142 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:09:59,142 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:09:59,143 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:09:59,143 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:09:59,143 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:09:59,143 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:09:59,143 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:09:59,204 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:09:59,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:09:59,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:09:59,234 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:09:59,234 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:09:59,235 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label20_true-unreach-call.c [2018-11-07 15:09:59,328 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b083c5d/d3b7501a502f4bacba8b469768b71243/FLAGcd577769c [2018-11-07 15:10:00,004 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:10:00,005 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label20_true-unreach-call.c [2018-11-07 15:10:00,026 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b083c5d/d3b7501a502f4bacba8b469768b71243/FLAGcd577769c [2018-11-07 15:10:00,043 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b083c5d/d3b7501a502f4bacba8b469768b71243 [2018-11-07 15:10:00,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:10:00,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:10:00,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:10:00,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:10:00,063 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:10:00,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:10:00" (1/1) ... [2018-11-07 15:10:00,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@febd950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:00, skipping insertion in model container [2018-11-07 15:10:00,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:10:00" (1/1) ... [2018-11-07 15:10:00,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:10:00,194 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:10:01,147 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:10:01,157 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:10:01,456 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:10:01,480 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:10:01,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01 WrapperNode [2018-11-07 15:10:01,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:10:01,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:10:01,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:10:01,483 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:10:01,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:10:01,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:10:01,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:10:01,732 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:10:01,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (1/1) ... [2018-11-07 15:10:01,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:10:01,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:10:01,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:10:01,909 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:10:01,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (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 15:10:01,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:10:01,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:10:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:10:01,984 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:10:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:10:01,984 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:10:01,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:10:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:10:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:10:01,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:10:01,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:10:08,468 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:10:08,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:10:08 BoogieIcfgContainer [2018-11-07 15:10:08,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:10:08,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:10:08,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:10:08,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:10:08,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:10:00" (1/3) ... [2018-11-07 15:10:08,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed07cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:10:08, skipping insertion in model container [2018-11-07 15:10:08,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:10:01" (2/3) ... [2018-11-07 15:10:08,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed07cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:10:08, skipping insertion in model container [2018-11-07 15:10:08,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:10:08" (3/3) ... [2018-11-07 15:10:08,483 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label20_true-unreach-call.c [2018-11-07 15:10:08,494 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:10:08,505 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:10:08,523 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:10:08,565 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:10:08,565 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:10:08,565 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:10:08,566 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:10:08,566 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:10:08,566 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:10:08,566 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:10:08,566 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:10:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 15:10:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-07 15:10:08,610 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:08,611 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] [2018-11-07 15:10:08,613 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:08,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:08,620 INFO L82 PathProgramCache]: Analyzing trace with hash 410122177, now seen corresponding path program 1 times [2018-11-07 15:10:08,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:08,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:08,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:08,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:08,674 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:09,130 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 15:10:09,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:09,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:10:09,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:09,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:10:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:10:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:10:09,160 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-11-07 15:10:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:15,775 INFO L93 Difference]: Finished difference Result 1510 states and 2773 transitions. [2018-11-07 15:10:15,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:10:15,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2018-11-07 15:10:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:15,805 INFO L225 Difference]: With dead ends: 1510 [2018-11-07 15:10:15,805 INFO L226 Difference]: Without dead ends: 1066 [2018-11-07 15:10:15,819 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 15:10:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2018-11-07 15:10:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2018-11-07 15:10:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2018-11-07 15:10:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1590 transitions. [2018-11-07 15:10:15,942 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1590 transitions. Word has length 49 [2018-11-07 15:10:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:15,943 INFO L480 AbstractCegarLoop]: Abstraction has 1064 states and 1590 transitions. [2018-11-07 15:10:15,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:10:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1590 transitions. [2018-11-07 15:10:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-07 15:10:15,950 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:15,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:15,951 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:15,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1315680885, now seen corresponding path program 1 times [2018-11-07 15:10:15,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:15,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:15,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:15,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:15,954 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:16,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:16,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:10:16,331 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:16,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:10:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:10:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:10:16,334 INFO L87 Difference]: Start difference. First operand 1064 states and 1590 transitions. Second operand 5 states. [2018-11-07 15:10:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:24,777 INFO L93 Difference]: Finished difference Result 3340 states and 4979 transitions. [2018-11-07 15:10:24,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:10:24,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2018-11-07 15:10:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:24,797 INFO L225 Difference]: With dead ends: 3340 [2018-11-07 15:10:24,798 INFO L226 Difference]: Without dead ends: 2282 [2018-11-07 15:10:24,805 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:10:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2018-11-07 15:10:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2267. [2018-11-07 15:10:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2267 states. [2018-11-07 15:10:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 3306 transitions. [2018-11-07 15:10:24,897 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 3306 transitions. Word has length 119 [2018-11-07 15:10:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:24,897 INFO L480 AbstractCegarLoop]: Abstraction has 2267 states and 3306 transitions. [2018-11-07 15:10:24,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:10:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 3306 transitions. [2018-11-07 15:10:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-07 15:10:24,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:24,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:24,909 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:24,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2016407952, now seen corresponding path program 1 times [2018-11-07 15:10:24,910 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:24,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:24,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:24,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:24,912 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:25,186 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:25,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:10:25,186 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:25,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:10:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:10:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:10:25,188 INFO L87 Difference]: Start difference. First operand 2267 states and 3306 transitions. Second operand 6 states. [2018-11-07 15:10:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:29,843 INFO L93 Difference]: Finished difference Result 6382 states and 9947 transitions. [2018-11-07 15:10:29,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:10:29,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-07 15:10:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:29,872 INFO L225 Difference]: With dead ends: 6382 [2018-11-07 15:10:29,872 INFO L226 Difference]: Without dead ends: 4430 [2018-11-07 15:10:29,888 INFO L604 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 [2018-11-07 15:10:29,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2018-11-07 15:10:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 4375. [2018-11-07 15:10:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4375 states. [2018-11-07 15:10:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4375 states to 4375 states and 5974 transitions. [2018-11-07 15:10:30,011 INFO L78 Accepts]: Start accepts. Automaton has 4375 states and 5974 transitions. Word has length 124 [2018-11-07 15:10:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:30,012 INFO L480 AbstractCegarLoop]: Abstraction has 4375 states and 5974 transitions. [2018-11-07 15:10:30,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:10:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4375 states and 5974 transitions. [2018-11-07 15:10:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-07 15:10:30,015 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:30,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:30,015 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:30,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2021875324, now seen corresponding path program 1 times [2018-11-07 15:10:30,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:30,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:30,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:30,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:30,018 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:30,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:10:30,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:10:30,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:30,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:10:30,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:10:30,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:10:30,219 INFO L87 Difference]: Start difference. First operand 4375 states and 5974 transitions. Second operand 4 states. [2018-11-07 15:10:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:34,073 INFO L93 Difference]: Finished difference Result 11465 states and 16390 transitions. [2018-11-07 15:10:34,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:10:34,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2018-11-07 15:10:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:34,115 INFO L225 Difference]: With dead ends: 11465 [2018-11-07 15:10:34,115 INFO L226 Difference]: Without dead ends: 7405 [2018-11-07 15:10:34,141 INFO L604 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 [2018-11-07 15:10:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7405 states. [2018-11-07 15:10:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7405 to 7399. [2018-11-07 15:10:34,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7399 states. [2018-11-07 15:10:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 9840 transitions. [2018-11-07 15:10:34,318 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 9840 transitions. Word has length 130 [2018-11-07 15:10:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:34,319 INFO L480 AbstractCegarLoop]: Abstraction has 7399 states and 9840 transitions. [2018-11-07 15:10:34,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:10:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 9840 transitions. [2018-11-07 15:10:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-07 15:10:34,323 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:34,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:34,324 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:34,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash 419544631, now seen corresponding path program 1 times [2018-11-07 15:10:34,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:34,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:34,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:34,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:34,326 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:34,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:34,844 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:10:34,845 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2018-11-07 15:10:34,847 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], [365], [367], [370], [378], [386], [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 15:10:34,893 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:10:34,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:10:35,527 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:10:36,102 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 15:10:36,104 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 15:10:36,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:36,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 15:10:36,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:36,151 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 15:10:36,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:36,169 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 15:10:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:36,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 15:10:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:36,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 15:10:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:10:36,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 15:10:36,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 11 [2018-11-07 15:10:36,857 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:36,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:10:36,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:10:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 15:10:36,859 INFO L87 Difference]: Start difference. First operand 7399 states and 9840 transitions. Second operand 6 states. [2018-11-07 15:10:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:43,130 INFO L93 Difference]: Finished difference Result 25922 states and 36237 transitions. [2018-11-07 15:10:43,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 15:10:43,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2018-11-07 15:10:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:43,263 INFO L225 Difference]: With dead ends: 25922 [2018-11-07 15:10:43,263 INFO L226 Difference]: Without dead ends: 18838 [2018-11-07 15:10:43,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 15:10:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18838 states. [2018-11-07 15:10:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18838 to 18786. [2018-11-07 15:10:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18786 states. [2018-11-07 15:10:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18786 states to 18786 states and 25161 transitions. [2018-11-07 15:10:43,799 INFO L78 Accepts]: Start accepts. Automaton has 18786 states and 25161 transitions. Word has length 145 [2018-11-07 15:10:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:43,800 INFO L480 AbstractCegarLoop]: Abstraction has 18786 states and 25161 transitions. [2018-11-07 15:10:43,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:10:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 18786 states and 25161 transitions. [2018-11-07 15:10:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-07 15:10:43,822 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:43,823 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:43,823 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:43,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 577768630, now seen corresponding path program 1 times [2018-11-07 15:10:43,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:43,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:43,825 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 85 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-07 15:10:44,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:44,416 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:10:44,417 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2018-11-07 15:10:44,417 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], [365], [367], [370], [378], [386], [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], [585], [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 15:10:44,425 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:10:44,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:10:44,590 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:10:45,945 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 15:10:45,945 INFO L272 AbstractInterpreter]: Visited 105 different actions 698 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 15:10:45,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:45,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 15:10:45,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:45,986 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 15:10:46,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:46,010 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 15:10:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:46,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 15:10:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 15:10:46,298 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 15:10:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 15:10:46,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 15:10:46,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-11-07 15:10:46,818 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:46,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:10:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:10:46,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:10:46,819 INFO L87 Difference]: Start difference. First operand 18786 states and 25161 transitions. Second operand 5 states. [2018-11-07 15:10:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:10:50,860 INFO L93 Difference]: Finished difference Result 43199 states and 60674 transitions. [2018-11-07 15:10:50,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 15:10:50,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2018-11-07 15:10:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:10:50,992 INFO L225 Difference]: With dead ends: 43199 [2018-11-07 15:10:50,993 INFO L226 Difference]: Without dead ends: 24727 [2018-11-07 15:10:51,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 434 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-11-07 15:10:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2018-11-07 15:10:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 23619. [2018-11-07 15:10:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23619 states. [2018-11-07 15:10:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23619 states to 23619 states and 30133 transitions. [2018-11-07 15:10:51,644 INFO L78 Accepts]: Start accepts. Automaton has 23619 states and 30133 transitions. Word has length 218 [2018-11-07 15:10:51,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:10:51,645 INFO L480 AbstractCegarLoop]: Abstraction has 23619 states and 30133 transitions. [2018-11-07 15:10:51,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:10:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 23619 states and 30133 transitions. [2018-11-07 15:10:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-11-07 15:10:51,682 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:10:51,682 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:10:51,683 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:10:51,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2071919887, now seen corresponding path program 1 times [2018-11-07 15:10:51,683 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:10:51,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:51,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:10:51,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:10:51,685 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:10:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:10:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 15:10:52,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:10:52,447 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:10:52,447 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2018-11-07 15:10:52,448 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], [365], [367], [370], [378], [386], [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], [617], [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], [746], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:10:52,453 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:10:52,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:10:52,565 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:10:52,586 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:10:52,586 INFO L272 AbstractInterpreter]: Visited 113 different actions 113 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:10:52,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:10:52,630 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:10:53,081 INFO L227 lantSequenceWeakener]: Weakened 229 states. On average, predicates are now at 77.88% of their original sizes. [2018-11-07 15:10:53,082 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:10:53,561 INFO L415 sIntCurrentIteration]: We unified 237 AI predicates to 237 [2018-11-07 15:10:53,561 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:10:53,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:10:53,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-11-07 15:10:53,562 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:10:53,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 15:10:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 15:10:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:10:53,564 INFO L87 Difference]: Start difference. First operand 23619 states and 30133 transitions. Second operand 8 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown