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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:37:17,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:37:17,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:37:17,235 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:37:17,236 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:37:17,237 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:37:17,238 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:37:17,240 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:37:17,242 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:37:17,242 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:37:17,243 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:37:17,244 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:37:17,245 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:37:17,246 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:37:17,247 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:37:17,248 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:37:17,248 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:37:17,250 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:37:17,253 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:37:17,254 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:37:17,255 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:37:17,256 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:37:17,259 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:37:17,259 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:37:17,259 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:37:17,260 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:37:17,263 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:37:17,264 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:37:17,265 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:37:17,269 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:37:17,270 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:37:17,270 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 12:37:17,270 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 12:37:17,271 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 12:37:17,273 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 12:37:17,274 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 12:37:17,274 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 12:37:17,304 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:37:17,304 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:37:17,306 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:37:17,306 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:37:17,307 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:37:17,307 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:37:17,307 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:37:17,307 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:37:17,307 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:37:17,308 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:37:17,308 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:37:17,308 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:37:17,309 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:37:17,309 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:37:17,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:37:17,310 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:37:17,311 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:37:17,311 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:37:17,311 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:37:17,311 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:37:17,312 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:37:17,312 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:37:17,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:37:17,312 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:37:17,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:37:17,313 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:37:17,313 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:37:17,313 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:37:17,313 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:37:17,313 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:37:17,314 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:37:17,314 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:37:17,314 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:37:17,314 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:37:17,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:37:17,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:37:17,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:37:17,393 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:37:17,394 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:37:17,395 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-18 12:37:17,757 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11ed53fe/4e13c92e81454d88bcebc8b54dc21c9a/FLAG946831247 [2018-09-18 12:37:18,000 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:37:18,001 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-18 12:37:18,013 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11ed53fe/4e13c92e81454d88bcebc8b54dc21c9a/FLAG946831247 [2018-09-18 12:37:18,028 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11ed53fe/4e13c92e81454d88bcebc8b54dc21c9a [2018-09-18 12:37:18,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:37:18,040 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:37:18,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:37:18,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:37:18,048 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:37:18,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7e6e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18, skipping insertion in model container [2018-09-18 12:37:18,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,065 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:37:18,399 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:37:18,418 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:37:18,482 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:37:18,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18 WrapperNode [2018-09-18 12:37:18,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:37:18,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:37:18,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:37:18,529 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:37:18,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:37:18,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:37:18,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:37:18,576 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:37:18,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (1/1) ... [2018-09-18 12:37:18,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:37:18,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:37:18,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:37:18,646 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:37:18,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (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 [2018-09-18 12:37:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:37:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:37:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:37:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:37:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:37:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:37:20,809 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:37:20,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:37:20 BoogieIcfgContainer [2018-09-18 12:37:20,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:37:20,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:37:20,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:37:20,817 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:37:20,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:37:18" (1/3) ... [2018-09-18 12:37:20,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eee1e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:37:20, skipping insertion in model container [2018-09-18 12:37:20,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:37:18" (2/3) ... [2018-09-18 12:37:20,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eee1e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:37:20, skipping insertion in model container [2018-09-18 12:37:20,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:37:20" (3/3) ... [2018-09-18 12:37:20,825 INFO L112 eAbstractionObserver]: Analyzing ICFG psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c [2018-09-18 12:37:20,836 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:37:20,845 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:37:20,897 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:37:20,898 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:37:20,899 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:37:20,899 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:37:20,899 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:37:20,899 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:37:20,899 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:37:20,900 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:37:20,900 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:37:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2018-09-18 12:37:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-18 12:37:20,928 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:20,929 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:20,931 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -784715869, now seen corresponding path program 1 times [2018-09-18 12:37:20,939 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:20,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:20,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:20,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:20,993 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:21,097 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:21,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-18 12:37:21,098 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:21,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-18 12:37:21,119 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-18 12:37:21,120 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-18 12:37:21,123 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 2 states. [2018-09-18 12:37:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:21,164 INFO L93 Difference]: Finished difference Result 222 states and 422 transitions. [2018-09-18 12:37:21,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-18 12:37:21,165 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-09-18 12:37:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:21,180 INFO L225 Difference]: With dead ends: 222 [2018-09-18 12:37:21,180 INFO L226 Difference]: Without dead ends: 104 [2018-09-18 12:37:21,185 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-18 12:37:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-18 12:37:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-18 12:37:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-18 12:37:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 169 transitions. [2018-09-18 12:37:21,241 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 169 transitions. Word has length 13 [2018-09-18 12:37:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:21,241 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 169 transitions. [2018-09-18 12:37:21,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-18 12:37:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2018-09-18 12:37:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-18 12:37:21,243 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:21,243 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:21,243 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:21,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1976099357, now seen corresponding path program 1 times [2018-09-18 12:37:21,244 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:21,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:21,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:21,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:21,245 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:21,352 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:21,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:21,352 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:21,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:21,355 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:21,355 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:21,355 INFO L87 Difference]: Start difference. First operand 104 states and 169 transitions. Second operand 3 states. [2018-09-18 12:37:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:21,620 INFO L93 Difference]: Finished difference Result 205 states and 336 transitions. [2018-09-18 12:37:21,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:21,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-09-18 12:37:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:21,623 INFO L225 Difference]: With dead ends: 205 [2018-09-18 12:37:21,623 INFO L226 Difference]: Without dead ends: 107 [2018-09-18 12:37:21,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-18 12:37:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-18 12:37:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-18 12:37:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 172 transitions. [2018-09-18 12:37:21,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 172 transitions. Word has length 14 [2018-09-18 12:37:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:21,641 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 172 transitions. [2018-09-18 12:37:21,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 172 transitions. [2018-09-18 12:37:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-18 12:37:21,643 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:21,643 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:21,643 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 645002054, now seen corresponding path program 1 times [2018-09-18 12:37:21,646 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:21,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:21,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:21,647 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:21,944 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:21,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:21,944 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:21,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:21,945 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:21,945 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:21,948 INFO L87 Difference]: Start difference. First operand 107 states and 172 transitions. Second operand 3 states. [2018-09-18 12:37:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:22,388 INFO L93 Difference]: Finished difference Result 209 states and 338 transitions. [2018-09-18 12:37:22,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:22,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-09-18 12:37:22,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:22,392 INFO L225 Difference]: With dead ends: 209 [2018-09-18 12:37:22,392 INFO L226 Difference]: Without dead ends: 190 [2018-09-18 12:37:22,393 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-18 12:37:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2018-09-18 12:37:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-18 12:37:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 285 transitions. [2018-09-18 12:37:22,421 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 285 transitions. Word has length 19 [2018-09-18 12:37:22,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:22,423 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 285 transitions. [2018-09-18 12:37:22,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 285 transitions. [2018-09-18 12:37:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-18 12:37:22,425 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:22,425 INFO L376 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:22,426 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1271474490, now seen corresponding path program 1 times [2018-09-18 12:37:22,426 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:22,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:22,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,428 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:22,551 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:22,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:22,551 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:22,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:22,552 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:22,552 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:22,553 INFO L87 Difference]: Start difference. First operand 176 states and 285 transitions. Second operand 3 states. [2018-09-18 12:37:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:22,611 INFO L93 Difference]: Finished difference Result 297 states and 481 transitions. [2018-09-18 12:37:22,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:22,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-09-18 12:37:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:22,613 INFO L225 Difference]: With dead ends: 297 [2018-09-18 12:37:22,614 INFO L226 Difference]: Without dead ends: 128 [2018-09-18 12:37:22,615 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-18 12:37:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2018-09-18 12:37:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-18 12:37:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 198 transitions. [2018-09-18 12:37:22,626 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 198 transitions. Word has length 20 [2018-09-18 12:37:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:22,627 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 198 transitions. [2018-09-18 12:37:22,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 198 transitions. [2018-09-18 12:37:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-18 12:37:22,628 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:22,628 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:22,629 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2078068567, now seen corresponding path program 1 times [2018-09-18 12:37:22,629 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:22,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:22,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,631 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-18 12:37:22,730 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:22,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:22,731 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:22,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:22,731 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:22,731 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:22,732 INFO L87 Difference]: Start difference. First operand 126 states and 198 transitions. Second operand 3 states. [2018-09-18 12:37:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:22,878 INFO L93 Difference]: Finished difference Result 230 states and 362 transitions. [2018-09-18 12:37:22,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:22,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-09-18 12:37:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:22,881 INFO L225 Difference]: With dead ends: 230 [2018-09-18 12:37:22,881 INFO L226 Difference]: Without dead ends: 111 [2018-09-18 12:37:22,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-18 12:37:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2018-09-18 12:37:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-18 12:37:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 167 transitions. [2018-09-18 12:37:22,905 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 167 transitions. Word has length 25 [2018-09-18 12:37:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:22,906 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 167 transitions. [2018-09-18 12:37:22,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 167 transitions. [2018-09-18 12:37:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-18 12:37:22,912 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:22,913 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:22,913 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2048080470, now seen corresponding path program 1 times [2018-09-18 12:37:22,914 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:22,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:22,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:22,915 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:23,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:23,093 INFO L197 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 [2018-09-18 12:37:23,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:23,117 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:23,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:23,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:23,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:23,397 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:23,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:23,415 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:23,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:23,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:23,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:23,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-09-18 12:37:23,547 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:23,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:37:23,548 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:37:23,548 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:37:23,549 INFO L87 Difference]: Start difference. First operand 109 states and 167 transitions. Second operand 4 states. [2018-09-18 12:37:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:23,880 INFO L93 Difference]: Finished difference Result 192 states and 299 transitions. [2018-09-18 12:37:23,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:37:23,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-09-18 12:37:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:23,884 INFO L225 Difference]: With dead ends: 192 [2018-09-18 12:37:23,884 INFO L226 Difference]: Without dead ends: 174 [2018-09-18 12:37:23,885 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:37:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-18 12:37:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2018-09-18 12:37:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-18 12:37:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 265 transitions. [2018-09-18 12:37:23,911 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 265 transitions. Word has length 27 [2018-09-18 12:37:23,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:23,912 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 265 transitions. [2018-09-18 12:37:23,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:37:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 265 transitions. [2018-09-18 12:37:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-18 12:37:23,915 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:23,915 INFO L376 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:23,915 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 945458420, now seen corresponding path program 1 times [2018-09-18 12:37:23,917 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:23,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:23,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:23,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:23,918 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:24,147 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:24,269 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:24,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:24,275 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:24,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:24,296 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:24,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:24,662 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:24,984 WARN L178 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-09-18 12:37:25,201 WARN L178 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2018-09-18 12:37:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-18 12:37:25,239 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:37:25,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 7 [2018-09-18 12:37:25,240 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:25,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:37:25,240 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:37:25,241 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:37:25,241 INFO L87 Difference]: Start difference. First operand 172 states and 265 transitions. Second operand 4 states. [2018-09-18 12:37:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:26,026 INFO L93 Difference]: Finished difference Result 289 states and 444 transitions. [2018-09-18 12:37:26,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 12:37:26,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2018-09-18 12:37:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:26,029 INFO L225 Difference]: With dead ends: 289 [2018-09-18 12:37:26,029 INFO L226 Difference]: Without dead ends: 280 [2018-09-18 12:37:26,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 12:37:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-18 12:37:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 262. [2018-09-18 12:37:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-09-18 12:37:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 408 transitions. [2018-09-18 12:37:26,044 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 408 transitions. Word has length 28 [2018-09-18 12:37:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:26,044 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 408 transitions. [2018-09-18 12:37:26,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:37:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 408 transitions. [2018-09-18 12:37:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-18 12:37:26,046 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:26,046 INFO L376 BasicCegarLoop]: trace histogram [3, 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] [2018-09-18 12:37:26,046 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1709359769, now seen corresponding path program 1 times [2018-09-18 12:37:26,047 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:26,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:26,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:26,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:26,048 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-18 12:37:26,142 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:26,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:26,143 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:26,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:26,144 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:26,144 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:26,144 INFO L87 Difference]: Start difference. First operand 262 states and 408 transitions. Second operand 3 states. [2018-09-18 12:37:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:26,233 INFO L93 Difference]: Finished difference Result 454 states and 703 transitions. [2018-09-18 12:37:26,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:26,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-09-18 12:37:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:26,238 INFO L225 Difference]: With dead ends: 454 [2018-09-18 12:37:26,238 INFO L226 Difference]: Without dead ends: 220 [2018-09-18 12:37:26,239 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-18 12:37:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2018-09-18 12:37:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-18 12:37:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 326 transitions. [2018-09-18 12:37:26,257 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 326 transitions. Word has length 29 [2018-09-18 12:37:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:26,258 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 326 transitions. [2018-09-18 12:37:26,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 326 transitions. [2018-09-18 12:37:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-18 12:37:26,263 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:26,263 INFO L376 BasicCegarLoop]: trace histogram [3, 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] [2018-09-18 12:37:26,263 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -847629460, now seen corresponding path program 1 times [2018-09-18 12:37:26,264 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:26,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:26,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:26,265 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:27,025 WARN L178 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2018-09-18 12:37:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:27,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:27,031 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:27,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:27,051 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:27,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 12:37:27,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 12:37:27,338 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:37:27,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-09-18 12:37:27,338 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:27,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:27,339 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:27,339 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:37:27,340 INFO L87 Difference]: Start difference. First operand 218 states and 326 transitions. Second operand 3 states. [2018-09-18 12:37:27,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:27,384 INFO L93 Difference]: Finished difference Result 221 states and 328 transitions. [2018-09-18 12:37:27,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:27,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-09-18 12:37:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:27,388 INFO L225 Difference]: With dead ends: 221 [2018-09-18 12:37:27,388 INFO L226 Difference]: Without dead ends: 215 [2018-09-18 12:37:27,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:37:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-18 12:37:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2018-09-18 12:37:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-18 12:37:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 317 transitions. [2018-09-18 12:37:27,398 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 317 transitions. Word has length 31 [2018-09-18 12:37:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:27,399 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 317 transitions. [2018-09-18 12:37:27,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 317 transitions. [2018-09-18 12:37:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-18 12:37:27,400 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:27,401 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-18 12:37:27,401 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -592457384, now seen corresponding path program 1 times [2018-09-18 12:37:27,401 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:27,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:27,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:27,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:27,403 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 12:37:27,494 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:27,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:27,495 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:27,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:27,495 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:27,496 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:27,496 INFO L87 Difference]: Start difference. First operand 214 states and 317 transitions. Second operand 3 states. [2018-09-18 12:37:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:27,752 INFO L93 Difference]: Finished difference Result 363 states and 541 transitions. [2018-09-18 12:37:27,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:27,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2018-09-18 12:37:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:27,754 INFO L225 Difference]: With dead ends: 363 [2018-09-18 12:37:27,755 INFO L226 Difference]: Without dead ends: 177 [2018-09-18 12:37:27,755 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-18 12:37:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2018-09-18 12:37:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-18 12:37:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 257 transitions. [2018-09-18 12:37:27,764 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 257 transitions. Word has length 36 [2018-09-18 12:37:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:27,764 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 257 transitions. [2018-09-18 12:37:27,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 257 transitions. [2018-09-18 12:37:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-18 12:37:27,765 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:27,765 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-18 12:37:27,766 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1564943497, now seen corresponding path program 1 times [2018-09-18 12:37:27,766 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:27,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:27,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:27,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:27,768 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:28,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:28,167 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:28,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:28,185 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:28,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:28,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:28,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:28,584 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:28,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:28,615 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:28,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:28,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:29,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:29,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-09-18 12:37:29,066 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:29,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:37:29,067 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:37:29,067 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:37:29,068 INFO L87 Difference]: Start difference. First operand 175 states and 257 transitions. Second operand 5 states. [2018-09-18 12:37:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:29,178 INFO L93 Difference]: Finished difference Result 252 states and 370 transitions. [2018-09-18 12:37:29,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 12:37:29,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-09-18 12:37:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:29,181 INFO L225 Difference]: With dead ends: 252 [2018-09-18 12:37:29,181 INFO L226 Difference]: Without dead ends: 247 [2018-09-18 12:37:29,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:37:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-18 12:37:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 241. [2018-09-18 12:37:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-18 12:37:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 356 transitions. [2018-09-18 12:37:29,192 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 356 transitions. Word has length 37 [2018-09-18 12:37:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:29,192 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 356 transitions. [2018-09-18 12:37:29,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:37:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 356 transitions. [2018-09-18 12:37:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-18 12:37:29,193 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:29,194 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-18 12:37:29,194 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:29,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2138202118, now seen corresponding path program 1 times [2018-09-18 12:37:29,194 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:29,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:29,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:29,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:29,196 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:29,418 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:29,586 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:29,768 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:37:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:29,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:29,774 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:29,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:29,793 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:29,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:30,116 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:30,410 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2018-09-18 12:37:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:31,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:31,134 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:31,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:31,152 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:31,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:31,412 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:31,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:31,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 5] total 11 [2018-09-18 12:37:31,777 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:37:31,778 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:37:31,778 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:37:31,778 INFO L87 Difference]: Start difference. First operand 241 states and 356 transitions. Second operand 6 states. [2018-09-18 12:37:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:32,429 INFO L93 Difference]: Finished difference Result 251 states and 365 transitions. [2018-09-18 12:37:32,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 12:37:32,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-09-18 12:37:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:32,432 INFO L225 Difference]: With dead ends: 251 [2018-09-18 12:37:32,432 INFO L226 Difference]: Without dead ends: 249 [2018-09-18 12:37:32,433 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:37:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-18 12:37:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2018-09-18 12:37:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-09-18 12:37:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2018-09-18 12:37:32,442 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 40 [2018-09-18 12:37:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:32,442 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2018-09-18 12:37:32,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:37:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2018-09-18 12:37:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-18 12:37:32,443 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:32,443 INFO L376 BasicCegarLoop]: trace histogram [4, 3, 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] [2018-09-18 12:37:32,444 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1984993975, now seen corresponding path program 1 times [2018-09-18 12:37:32,444 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:32,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:32,445 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-18 12:37:32,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:32,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:32,526 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:32,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:32,526 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:32,526 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:32,527 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand 3 states. [2018-09-18 12:37:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:32,701 INFO L93 Difference]: Finished difference Result 422 states and 620 transitions. [2018-09-18 12:37:32,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:32,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-09-18 12:37:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:32,706 INFO L225 Difference]: With dead ends: 422 [2018-09-18 12:37:32,706 INFO L226 Difference]: Without dead ends: 226 [2018-09-18 12:37:32,707 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:32,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-18 12:37:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2018-09-18 12:37:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-18 12:37:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 320 transitions. [2018-09-18 12:37:32,717 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 320 transitions. Word has length 41 [2018-09-18 12:37:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:32,717 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 320 transitions. [2018-09-18 12:37:32,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 320 transitions. [2018-09-18 12:37:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-18 12:37:32,718 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:32,718 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2018-09-18 12:37:32,718 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash -636700121, now seen corresponding path program 1 times [2018-09-18 12:37:32,718 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:32,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:32,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:32,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:32,722 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-09-18 12:37:32,819 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:37:32,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:37:32,819 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:37:32,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:37:32,820 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:37:32,820 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:32,821 INFO L87 Difference]: Start difference. First operand 224 states and 320 transitions. Second operand 3 states. [2018-09-18 12:37:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:33,069 INFO L93 Difference]: Finished difference Result 305 states and 435 transitions. [2018-09-18 12:37:33,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:37:33,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2018-09-18 12:37:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:33,071 INFO L225 Difference]: With dead ends: 305 [2018-09-18 12:37:33,071 INFO L226 Difference]: Without dead ends: 146 [2018-09-18 12:37:33,072 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:37:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-18 12:37:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2018-09-18 12:37:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-18 12:37:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-09-18 12:37:33,079 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 50 [2018-09-18 12:37:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:33,079 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-09-18 12:37:33,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:37:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-09-18 12:37:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-18 12:37:33,080 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:33,080 INFO L376 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 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] [2018-09-18 12:37:33,081 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash 783335988, now seen corresponding path program 1 times [2018-09-18 12:37:33,081 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:33,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:33,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:33,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:33,082 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:33,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:33,467 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:33,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:33,481 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:33,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:33,997 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:34,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:34,119 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:34,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:34,135 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:34,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:37:34,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 12:37:34,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:34,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 5, 4] total 15 [2018-09-18 12:37:34,391 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:34,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:37:34,391 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:37:34,391 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-09-18 12:37:34,392 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 9 states. [2018-09-18 12:37:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:34,775 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2018-09-18 12:37:34,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:37:34,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2018-09-18 12:37:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:34,778 INFO L225 Difference]: With dead ends: 187 [2018-09-18 12:37:34,778 INFO L226 Difference]: Without dead ends: 183 [2018-09-18 12:37:34,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2018-09-18 12:37:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-18 12:37:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2018-09-18 12:37:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-18 12:37:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 251 transitions. [2018-09-18 12:37:34,793 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 251 transitions. Word has length 51 [2018-09-18 12:37:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:34,793 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 251 transitions. [2018-09-18 12:37:34,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:37:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 251 transitions. [2018-09-18 12:37:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-18 12:37:34,794 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:34,794 INFO L376 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 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] [2018-09-18 12:37:34,795 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1248250631, now seen corresponding path program 1 times [2018-09-18 12:37:34,795 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:34,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:34,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:34,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:34,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:35,058 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:35,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:35,293 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:35,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:35,301 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:35,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:35,540 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:36,094 WARN L178 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-09-18 12:37:36,932 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2018-09-18 12:37:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-18 12:37:36,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:36,979 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:36,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:36,995 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:37,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:37,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:37,490 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 17 [2018-09-18 12:37:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-18 12:37:37,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:37,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7, 8, 7] total 16 [2018-09-18 12:37:37,640 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:37,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:37:37,640 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:37:37,641 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:37:37,641 INFO L87 Difference]: Start difference. First operand 180 states and 251 transitions. Second operand 9 states. [2018-09-18 12:37:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:38,166 INFO L93 Difference]: Finished difference Result 184 states and 255 transitions. [2018-09-18 12:37:38,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 12:37:38,167 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2018-09-18 12:37:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:38,169 INFO L225 Difference]: With dead ends: 184 [2018-09-18 12:37:38,169 INFO L226 Difference]: Without dead ends: 182 [2018-09-18 12:37:38,170 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-09-18 12:37:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-18 12:37:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2018-09-18 12:37:38,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-18 12:37:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2018-09-18 12:37:38,178 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 61 [2018-09-18 12:37:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2018-09-18 12:37:38,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:37:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2018-09-18 12:37:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-18 12:37:38,179 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:38,179 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 3, 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] [2018-09-18 12:37:38,180 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash 564297596, now seen corresponding path program 1 times [2018-09-18 12:37:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:38,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:38,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:38,181 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 12:37:38,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:38,898 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:38,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:38,914 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:38,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 12:37:39,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 12:37:39,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:39,483 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:39,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:39,501 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:39,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 12:37:39,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-09-18 12:37:40,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:40,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 6, 4] total 9 [2018-09-18 12:37:40,019 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 12:37:40,019 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 12:37:40,019 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:37:40,020 INFO L87 Difference]: Start difference. First operand 181 states and 252 transitions. Second operand 7 states. [2018-09-18 12:37:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:40,119 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2018-09-18 12:37:40,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:37:40,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2018-09-18 12:37:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:40,123 INFO L225 Difference]: With dead ends: 223 [2018-09-18 12:37:40,123 INFO L226 Difference]: Without dead ends: 220 [2018-09-18 12:37:40,123 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 308 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:37:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-09-18 12:37:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2018-09-18 12:37:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-18 12:37:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 302 transitions. [2018-09-18 12:37:40,133 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 302 transitions. Word has length 79 [2018-09-18 12:37:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:40,134 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 302 transitions. [2018-09-18 12:37:40,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 12:37:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 302 transitions. [2018-09-18 12:37:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-18 12:37:40,135 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:40,135 INFO L376 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 3, 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] [2018-09-18 12:37:40,135 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1030800333, now seen corresponding path program 1 times [2018-09-18 12:37:40,136 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:40,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:40,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:40,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:40,137 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:40,422 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:40,593 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:40,792 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:37:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:41,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:41,019 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:41,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:41,027 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:41,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:41,249 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:41,666 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 23 [2018-09-18 12:37:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:42,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:42,207 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:42,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:42,223 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:42,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:42,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-09-18 12:37:43,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:43,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8, 9, 6] total 16 [2018-09-18 12:37:43,303 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 12:37:43,304 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 12:37:43,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:37:43,304 INFO L87 Difference]: Start difference. First operand 217 states and 302 transitions. Second operand 10 states. [2018-09-18 12:37:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:43,777 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2018-09-18 12:37:43,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-18 12:37:43,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2018-09-18 12:37:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:43,784 INFO L225 Difference]: With dead ends: 220 [2018-09-18 12:37:43,784 INFO L226 Difference]: Without dead ends: 218 [2018-09-18 12:37:43,785 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:37:43,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-18 12:37:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-09-18 12:37:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-09-18 12:37:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 303 transitions. [2018-09-18 12:37:43,794 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 303 transitions. Word has length 82 [2018-09-18 12:37:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:43,794 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 303 transitions. [2018-09-18 12:37:43,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 12:37:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 303 transitions. [2018-09-18 12:37:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-18 12:37:43,795 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:43,795 INFO L376 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 4, 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] [2018-09-18 12:37:43,796 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:43,796 INFO L82 PathProgramCache]: Analyzing trace with hash 644642791, now seen corresponding path program 1 times [2018-09-18 12:37:43,796 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:43,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:43,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:43,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:43,797 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 12:37:44,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:44,221 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:44,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:44,230 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:44,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:44,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-09-18 12:37:44,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:44,757 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:44,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:44,774 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:37:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:45,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-09-18 12:37:45,067 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-09-18 12:37:45,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:45,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 6, 7, 4] total 21 [2018-09-18 12:37:45,320 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:45,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-18 12:37:45,320 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-18 12:37:45,320 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:37:45,321 INFO L87 Difference]: Start difference. First operand 218 states and 303 transitions. Second operand 15 states. [2018-09-18 12:37:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:45,519 INFO L93 Difference]: Finished difference Result 261 states and 363 transitions. [2018-09-18 12:37:45,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 12:37:45,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2018-09-18 12:37:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:45,523 INFO L225 Difference]: With dead ends: 261 [2018-09-18 12:37:45,523 INFO L226 Difference]: Without dead ends: 257 [2018-09-18 12:37:45,524 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:37:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-18 12:37:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2018-09-18 12:37:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-18 12:37:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-09-18 12:37:45,534 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 93 [2018-09-18 12:37:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:45,535 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-09-18 12:37:45,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-18 12:37:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-09-18 12:37:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-18 12:37:45,536 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:45,536 INFO L376 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:45,536 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1306502892, now seen corresponding path program 2 times [2018-09-18 12:37:45,537 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:45,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:45,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:37:45,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:45,538 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:45,874 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:46,045 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:46,537 WARN L178 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-09-18 12:37:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:46,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:46,851 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:46,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:46,868 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:46,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:46,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:46,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:47,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:47,432 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 21 [2018-09-18 12:37:48,126 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-09-18 12:37:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 42 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-18 12:37:48,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:48,254 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:48,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:48,272 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:48,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:48,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:48,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:48,925 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 18 proven. 128 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-09-18 12:37:49,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:49,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8, 12, 7] total 21 [2018-09-18 12:37:49,552 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:49,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 12:37:49,553 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 12:37:49,553 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:37:49,554 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 14 states. [2018-09-18 12:37:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:50,248 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2018-09-18 12:37:50,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-18 12:37:50,249 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 103 [2018-09-18 12:37:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:50,252 INFO L225 Difference]: With dead ends: 264 [2018-09-18 12:37:50,253 INFO L226 Difference]: Without dead ends: 262 [2018-09-18 12:37:50,253 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 396 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2018-09-18 12:37:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-09-18 12:37:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2018-09-18 12:37:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-18 12:37:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 355 transitions. [2018-09-18 12:37:50,263 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 355 transitions. Word has length 103 [2018-09-18 12:37:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:50,263 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 355 transitions. [2018-09-18 12:37:50,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 12:37:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 355 transitions. [2018-09-18 12:37:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-18 12:37:50,265 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:50,265 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:50,265 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash -498500945, now seen corresponding path program 2 times [2018-09-18 12:37:50,265 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:50,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:50,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 12:37:50,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:50,266 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:50,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:50,935 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:50,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:50,943 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:51,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:51,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:51,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:51,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-18 12:37:51,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:51,441 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:51,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:51,456 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:51,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:51,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:51,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 248 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:51,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 22 proven. 120 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-09-18 12:37:52,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:52,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 8, 4] total 11 [2018-09-18 12:37:52,045 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:52,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:37:52,046 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:37:52,046 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:37:52,046 INFO L87 Difference]: Start difference. First operand 255 states and 355 transitions. Second operand 9 states. [2018-09-18 12:37:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:52,191 INFO L93 Difference]: Finished difference Result 297 states and 411 transitions. [2018-09-18 12:37:52,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 12:37:52,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2018-09-18 12:37:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:52,194 INFO L225 Difference]: With dead ends: 297 [2018-09-18 12:37:52,195 INFO L226 Difference]: Without dead ends: 294 [2018-09-18 12:37:52,195 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:37:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-09-18 12:37:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2018-09-18 12:37:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-18 12:37:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 405 transitions. [2018-09-18 12:37:52,205 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 405 transitions. Word has length 121 [2018-09-18 12:37:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:52,206 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 405 transitions. [2018-09-18 12:37:52,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:37:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 405 transitions. [2018-09-18 12:37:52,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-18 12:37:52,207 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:52,207 INFO L376 BasicCegarLoop]: trace histogram [12, 11, 8, 8, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:52,208 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -363229152, now seen corresponding path program 2 times [2018-09-18 12:37:52,208 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:52,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 12:37:52,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:52,209 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:52,530 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:52,675 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:52,853 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:37:53,064 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:53,296 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:53,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:53,527 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:53,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:53,534 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:53,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:53,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:53,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:53,789 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 107 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-09-18 12:37:54,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:54,763 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:54,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:54,777 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:55,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:55,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:55,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:55,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 22 proven. 183 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-18 12:37:56,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:56,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 9, 13, 6] total 23 [2018-09-18 12:37:56,748 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:56,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 12:37:56,749 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 12:37:56,749 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-09-18 12:37:56,749 INFO L87 Difference]: Start difference. First operand 291 states and 405 transitions. Second operand 14 states. [2018-09-18 12:37:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:57,046 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2018-09-18 12:37:57,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-18 12:37:57,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-09-18 12:37:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:57,051 INFO L225 Difference]: With dead ends: 294 [2018-09-18 12:37:57,051 INFO L226 Difference]: Without dead ends: 292 [2018-09-18 12:37:57,052 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 480 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-09-18 12:37:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-09-18 12:37:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-09-18 12:37:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-18 12:37:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2018-09-18 12:37:57,062 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 124 [2018-09-18 12:37:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:57,062 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2018-09-18 12:37:57,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 12:37:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2018-09-18 12:37:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-18 12:37:57,064 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:57,064 INFO L376 BasicCegarLoop]: trace histogram [13, 12, 9, 9, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:57,064 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -730440230, now seen corresponding path program 2 times [2018-09-18 12:37:57,065 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:57,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:57,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 12:37:57,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:57,066 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:57,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:57,604 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:37:57,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:57,612 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:57,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:57,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:57,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:37:57,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 225 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-18 12:37:58,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:37:58,155 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:37:58,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 12:37:58,171 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 12:37:58,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 12:37:58,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:37:58,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:37:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 318 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-09-18 12:37:58,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:37:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 24 proven. 153 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-09-18 12:37:58,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:37:58,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 6, 9, 4] total 27 [2018-09-18 12:37:58,713 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:37:58,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-18 12:37:58,714 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-18 12:37:58,714 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-09-18 12:37:58,715 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand 21 states. [2018-09-18 12:37:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:37:59,016 INFO L93 Difference]: Finished difference Result 335 states and 466 transitions. [2018-09-18 12:37:59,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 12:37:59,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 135 [2018-09-18 12:37:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:37:59,019 INFO L225 Difference]: With dead ends: 335 [2018-09-18 12:37:59,019 INFO L226 Difference]: Without dead ends: 331 [2018-09-18 12:37:59,020 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2018-09-18 12:37:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-18 12:37:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 328. [2018-09-18 12:37:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-18 12:37:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 457 transitions. [2018-09-18 12:37:59,032 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 457 transitions. Word has length 135 [2018-09-18 12:37:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:37:59,033 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 457 transitions. [2018-09-18 12:37:59,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-18 12:37:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 457 transitions. [2018-09-18 12:37:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-18 12:37:59,034 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:37:59,035 INFO L376 BasicCegarLoop]: trace histogram [14, 13, 9, 9, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:37:59,035 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:37:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1381697249, now seen corresponding path program 3 times [2018-09-18 12:37:59,035 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:37:59,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:59,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 12:37:59,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:37:59,036 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:37:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:37:59,475 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:37:59,640 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-09-18 12:38:00,022 WARN L178 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-09-18 12:38:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 26 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:38:00,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:38:00,277 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:38:00,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-18 12:38:00,288 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-18 12:38:00,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-18 12:38:00,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:38:00,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:38:00,846 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2018-09-18 12:38:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-18 12:38:01,469 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:38:01,948 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 22 [2018-09-18 12:38:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-18 12:38:02,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:38:02,729 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:38:02,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-18 12:38:02,744 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-09-18 12:38:03,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-18 12:38:03,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 12:38:03,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:38:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 209 proven. 25 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-18 12:38:03,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:38:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 208 proven. 26 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-18 12:38:04,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:38:04,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7, 8, 8] total 28 [2018-09-18 12:38:04,084 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:38:04,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-18 12:38:04,085 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-18 12:38:04,086 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2018-09-18 12:38:04,086 INFO L87 Difference]: Start difference. First operand 328 states and 457 transitions. Second operand 22 states. [2018-09-18 12:38:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:38:05,420 INFO L93 Difference]: Finished difference Result 348 states and 478 transitions. [2018-09-18 12:38:05,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-18 12:38:05,420 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2018-09-18 12:38:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:38:05,421 INFO L225 Difference]: With dead ends: 348 [2018-09-18 12:38:05,421 INFO L226 Difference]: Without dead ends: 0 [2018-09-18 12:38:05,423 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 575 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2018-09-18 12:38:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-18 12:38:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-18 12:38:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-18 12:38:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-18 12:38:05,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 145 [2018-09-18 12:38:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:38:05,424 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-18 12:38:05,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-18 12:38:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-18 12:38:05,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-18 12:38:05,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-18 12:38:05,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,492 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,510 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,513 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,524 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-18 12:38:05,999 WARN L178 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2018-09-18 12:38:06,090 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-09-18 12:38:06,090 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-09-18 12:38:06,090 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-09-18 12:38:06,090 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-09-18 12:38:06,090 INFO L429 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-09-18 12:38:06,090 INFO L429 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 14 566) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L498(lines 498 500) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L366(lines 366 368) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L466(lines 466 468) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 14 566) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L39(lines 39 58) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L40(lines 40 55) no Hoare annotation was computed. [2018-09-18 12:38:06,091 INFO L426 ceAbstractionStarter]: For program point L140(lines 140 155) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L240(lines 240 255) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L108(lines 108 123) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L42(lines 42 53) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L340(lines 340 355) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L208(lines 208 223) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L142(lines 142 153) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L76(lines 76 91) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L440(lines 440 455) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L308(lines 308 323) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L242(lines 242 253) no Hoare annotation was computed. [2018-09-18 12:38:06,092 INFO L426 ceAbstractionStarter]: For program point L176(lines 176 191) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L110(lines 110 121) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L540(lines 540 555) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L408(lines 408 423) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L342(lines 342 353) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L276(lines 276 291) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L210(lines 210 221) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L78(lines 78 89) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L508(lines 508 523) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L442(lines 442 453) no Hoare annotation was computed. [2018-09-18 12:38:06,093 INFO L426 ceAbstractionStarter]: For program point L376(lines 376 391) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L310(lines 310 321) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L178(lines 178 189) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L46(lines 46 48) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L542(lines 542 553) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L476(lines 476 491) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L410(lines 410 421) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L278(lines 278 289) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L146(lines 146 148) no Hoare annotation was computed. [2018-09-18 12:38:06,094 INFO L426 ceAbstractionStarter]: For program point L510(lines 510 521) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L378(lines 378 389) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L246(lines 246 248) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L114(lines 114 116) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L478(lines 478 489) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L346(lines 346 348) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L214(lines 214 216) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L82(lines 82 84) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L446(lines 446 448) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L314(lines 314 316) no Hoare annotation was computed. [2018-09-18 12:38:06,095 INFO L426 ceAbstractionStarter]: For program point L182(lines 182 184) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L546(lines 546 548) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L414(lines 414 416) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L282(lines 282 284) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L422 ceAbstractionStarter]: At program point L547(lines 14 566) the Hoare annotation is: false [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L514(lines 514 516) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L382(lines 382 384) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L426 ceAbstractionStarter]: For program point L482(lines 482 484) no Hoare annotation was computed. [2018-09-18 12:38:06,096 INFO L422 ceAbstractionStarter]: At program point L24-3(lines 24 561) the Hoare annotation is: (let ((.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (<= 0 main_~this_expect~0) (= main_~q~0 0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod main_~this_expect~0 2))))) (<= 5 main_~q~0) (<= 0 (+ main_~P8~0 2147483648)) (<= main_~P8~0 2147483647) .cse0 .cse1))) [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L24-4(lines 24 561) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L124(lines 124 139) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L224(lines 224 239) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L92(lines 92 107) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L59(lines 59 158) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L324(lines 324 339) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L192(lines 192 207) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L159(lines 159 258) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L126(lines 126 137) no Hoare annotation was computed. [2018-09-18 12:38:06,097 INFO L426 ceAbstractionStarter]: For program point L60(lines 60 75) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L424(lines 424 439) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L292(lines 292 307) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L259(lines 259 358) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L226(lines 226 237) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L160(lines 160 175) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L94(lines 94 105) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L422 ceAbstractionStarter]: At program point L557(lines 24 561) the Hoare annotation is: (let ((.cse3 (<= main_~this_buffer_empty~0 1)) (.cse5 (<= 1 main_~this_buffer_empty~0)) (.cse7 (exists ((main_~P1~0 Int)) (let ((.cse8 (mod main_~P1~0 2))) (and (= .cse8 0) (= .cse8 (mod main_~this_expect~0 2)))))) (.cse4 (<= 0 (+ main_~P8~0 2147483648))) (.cse6 (<= main_~P8~0 2147483647)) (.cse0 (<= main_~this_buffer_empty~0 0)) (.cse1 (<= 0 main_~this_buffer_empty~0))) (or (and (<= main_~this_expect~0 0) (= main_~q~0 0) (<= 0 main_~this_expect~0) .cse0 .cse1) (and (exists ((main_~P1~0 Int)) (let ((.cse2 (mod main_~P1~0 2))) (and (= .cse2 0) (= .cse2 (mod (+ main_~this_expect~0 1) 2))))) .cse3 .cse4 .cse5 (= main_~q~0 4) .cse6) (and (= 0 (mod (+ main_~this_expect~0 1) 2)) .cse4 (= main_~q~0 3) .cse6 .cse0 .cse1) (and .cse7 (= main_~q~0 1) .cse3 .cse4 .cse5 .cse6) (and .cse7 (<= 5 main_~q~0) .cse4 .cse6 .cse0 .cse1))) [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L524(lines 524 539) no Hoare annotation was computed. [2018-09-18 12:38:06,098 INFO L426 ceAbstractionStarter]: For program point L392(lines 392 407) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L359(lines 359 458) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L326(lines 326 337) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L260(lines 260 275) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L194(lines 194 205) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L62(lines 62 73) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L492(lines 492 507) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L459(lines 459 558) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L426(lines 426 437) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L360(lines 360 375) no Hoare annotation was computed. [2018-09-18 12:38:06,099 INFO L426 ceAbstractionStarter]: For program point L294(lines 294 305) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L162(lines 162 173) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L429 ceAbstractionStarter]: At program point mainENTRY(lines 14 566) the Hoare annotation is: true [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L526(lines 526 537) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L460(lines 460 475) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L394(lines 394 405) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L262(lines 262 273) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L130(lines 130 132) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L494(lines 494 505) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L362(lines 362 373) no Hoare annotation was computed. [2018-09-18 12:38:06,100 INFO L426 ceAbstractionStarter]: For program point L230(lines 230 232) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L98(lines 98 100) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 565) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L462(lines 462 473) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L330(lines 330 332) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L198(lines 198 200) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L66(lines 66 68) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L430(lines 430 432) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L298(lines 298 300) no Hoare annotation was computed. [2018-09-18 12:38:06,101 INFO L426 ceAbstractionStarter]: For program point L166(lines 166 168) no Hoare annotation was computed. [2018-09-18 12:38:06,102 INFO L426 ceAbstractionStarter]: For program point L530(lines 530 532) no Hoare annotation was computed. [2018-09-18 12:38:06,102 INFO L426 ceAbstractionStarter]: For program point L398(lines 398 400) no Hoare annotation was computed. [2018-09-18 12:38:06,102 INFO L426 ceAbstractionStarter]: For program point L266(lines 266 268) no Hoare annotation was computed. [2018-09-18 12:38:06,108 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,109 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,109 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,109 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,109 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,110 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,120 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,120 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,120 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,121 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,121 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,121 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,123 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,123 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,124 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,124 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:38:06 BoogieIcfgContainer [2018-09-18 12:38:06,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:38:06,127 INFO L168 Benchmark]: Toolchain (without parser) took 48089.51 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.2 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -738.3 MB). Peak memory consumption was 417.7 MB. Max. memory is 7.1 GB. [2018-09-18 12:38:06,128 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:38:06,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-18 12:38:06,129 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:38:06,130 INFO L168 Benchmark]: Boogie Preprocessor took 70.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-09-18 12:38:06,130 INFO L168 Benchmark]: RCFGBuilder took 2164.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -755.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2018-09-18 12:38:06,131 INFO L168 Benchmark]: TraceAbstraction took 45314.26 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 420.5 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -14.6 MB). Peak memory consumption was 405.9 MB. Max. memory is 7.1 GB. [2018-09-18 12:38:06,135 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 485.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2164.80 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -755.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 45314.26 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 420.5 MB). Free memory was 2.1 GB in the beginning and 2.2 GB in the end (delta: -14.6 MB). Peak memory consumption was 405.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 565]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant [2018-09-18 12:38:06,143 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,144 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,144 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,144 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,144 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,144 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,146 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,146 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,147 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,147 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,147 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,147 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: (((((((this_expect <= 0 && q == 0) && 0 <= this_expect) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == (this_expect + 1) % 2) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && q == 4) && P8 <= 2147483647)) || (((((0 == (this_expect + 1) % 2 && 0 <= P8 + 2147483648) && q == 3) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && q == 1) && this_buffer_empty <= 1) && 0 <= P8 + 2147483648) && 1 <= this_buffer_empty) && P8 <= 2147483647)) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 24]: Loop Invariant [2018-09-18 12:38:06,149 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,149 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,150 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] [2018-09-18 12:38:06,150 WARN L389 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~P1~0,QUANTIFIED] Derived loop invariant: ((((this_expect <= 0 && 0 <= this_expect) && q == 0) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) || ((((((\exists main_~P1~0 : int :: main_~P1~0 % 2 == 0 && main_~P1~0 % 2 == this_expect % 2) && 5 <= q) && 0 <= P8 + 2147483648) && P8 <= 2147483647) && this_buffer_empty <= 0) && 0 <= this_buffer_empty) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 114 locations, 1 error locations. SAFE Result, 45.2s OverallTime, 24 OverallIterations, 14 TraceHistogramMax, 8.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 4505 SDtfs, 2827 SDslu, 23008 SDs, 0 SdLazy, 2578 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4695 GetRequests, 4399 SyntacticMatches, 61 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 23.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=328occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 83 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 49 NumberOfFragments, 194 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3418 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 27.3s InterpolantComputationTime, 3659 NumberOfCodeBlocks, 3491 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 5834 ConstructedInterpolants, 1245 QuantifiedInterpolants, 8189772 SizeOfPredicates, 123 NumberOfNonLiveVariables, 14032 ConjunctsInSsa, 688 ConjunctsInUnsatCore, 80 InterpolantComputations, 12 PerfectInterpolantSequences, 3991/10453 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-38-06-155.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/psyco_abp_1_true-unreach-call_false-termination_true-no-overflow.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-38-06-155.csv Received shutdown request...